fix(tunneling): Adjust exponential backoff duration

* feat(client): Add support for SSH tunneling

* Fix test

.github/codecov.yml

@@ -1,6 +1,9 @@
 ignore:
-  - "watchdog/watchdog.go"
   - "storage/store/sql/specific_postgres.go" # Can't test for postgres
+  - "watchdog/endpoint.go"
+  - "watchdog/external_endpoint.go"
+  - "watchdog/suite.go"
+  - "watchdog/watchdog.go"
 comment: false
 coverage:
   status:

.github/workflows/benchmark.yml

@@ -20,11 +20,11 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
-          go-version: 1.24.1
+          go-version: 1.24.4
           repository: "${{ github.event.inputs.repository || 'TwiN/gatus' }}"
           ref: "${{ github.event.inputs.ref || 'master' }}"
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Benchmark
         run: go test -bench=. ./storage/store

.github/workflows/labeler.yml

@@ -26,10 +26,15 @@ jobs:
             gh issue edit "$NUMBER" --add-label "feature"
           elif [[ $TITLE == "fix"* ]]; then
             gh issue edit "$NUMBER" --add-label "bug"
+          elif [[ $TITLE == "docs"* ]]; then
+            gh issue edit "$NUMBER" --add-label "documentation"
           fi
           if [[ $TITLE == *"alerting"* || $TITLE == *"provider"* || $TITLE == *"alert"* ]]; then
             gh issue edit "$NUMBER" --add-label "area/alerting"
           fi
+          if [[ $TITLE == *"(ui)"* || $TITLE == *"ui:"* ]]; then
+            gh issue edit "$NUMBER" --add-label "area/ui"
+          fi
           if [[ $TITLE == *"storage"* || $TITLE == *"postgres"* || $TITLE == *"sqlite"* ]]; then
             gh issue edit "$NUMBER" --add-label "area/storage"
           fi
@@ -39,4 +44,3 @@ jobs:
           if [[ $TITLE == *"metric"* || $TITLE == *"prometheus"* ]]; then
             gh issue edit "$NUMBER" --add-label "area/metrics"
           fi
-          

.github/workflows/publish-custom.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx

.github/workflows/publish-experimental.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx

.github/workflows/publish-latest.yml

@@ -11,9 +11,9 @@ jobs:
   publish-latest:
     runs-on: ubuntu-latest
     if: ${{ (github.event.workflow_run.conclusion == 'success') && (github.event.workflow_run.head_repository.full_name == github.repository) }}
-    timeout-minutes: 120
+    timeout-minutes: 240
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx

.github/workflows/publish-release.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 240
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx

.github/workflows/test-ui.yml

@@ -13,6 +13,6 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - run: make frontend-install-dependencies
       - run: make frontend-build

.github/workflows/test.yml

@@ -16,10 +16,10 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
-          go-version: 1.24.1
-      - uses: actions/checkout@v4
+          go-version: 1.24.4
+      - uses: actions/checkout@v5
       - name: Build binary to make sure it works
         run: go build
       - name: Test
@@ -28,7 +28,7 @@ jobs:
         # was configured by the "Set up Go" step (otherwise, it'd use sudo's "go" executable)
         run: sudo env "PATH=$PATH" "GOROOT=$GOROOT" go test ./... -race -coverprofile=coverage.txt -covermode=atomic
       - name: Codecov
-        uses: codecov/codecov-action@v5.4.3
+        uses: codecov/codecov-action@v5.5.1
         with:
           files: ./coverage.txt
           token: ${{ secrets.CODECOV_TOKEN }}

alerting/alert/alert.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/TwiN/logr"
 	"gopkg.in/yaml.v3"
@@ -14,6 +15,8 @@ import (
 var (
 	// ErrAlertWithInvalidDescription is the error with which Gatus will panic if an alert has an invalid character
 	ErrAlertWithInvalidDescription = errors.New("alert description must not have \" or \\")
+
+	ErrAlertWithInvalidMinimumReminderInterval = errors.New("minimum-reminder-interval must be either omitted or be at least 5m")
 )
 
 // Alert is endpoint.Endpoint's alert configuration
@@ -35,6 +38,9 @@ type Alert struct {
 	// SuccessThreshold defines how many successful executions must happen in a row before an ongoing incident is marked as resolved
 	SuccessThreshold int `yaml:"success-threshold"`
 
+	// MinimumReminderInterval is the interval between reminders
+	MinimumReminderInterval time.Duration `yaml:"minimum-reminder-interval,omitempty"`
+
 	// Description of the alert. Will be included in the alert sent.
 	//
 	// This is a pointer, because it is populated by YAML and we need to know whether it was explicitly set to a value
@@ -74,6 +80,9 @@ func (alert *Alert) ValidateAndSetDefaults() error {
 	if alert.SuccessThreshold <= 0 {
 		alert.SuccessThreshold = 2
 	}
+	if alert.MinimumReminderInterval != 0 && alert.MinimumReminderInterval < 5*time.Minute {
+		return ErrAlertWithInvalidMinimumReminderInterval
+	}
 	if strings.ContainsAny(alert.GetDescription(), "\"\\") {
 		return ErrAlertWithInvalidDescription
 	}

alerting/alert/alert_test.go

@@ -3,6 +3,7 @@ package alert
 import (
 	"errors"
 	"testing"
+	"time"
 )
 
 func TestAlert_ValidateAndSetDefaults(t *testing.T) {
@@ -36,6 +37,61 @@ func TestAlert_ValidateAndSetDefaults(t *testing.T) {
 			expectedFailureThreshold: 10,
 			expectedSuccessThreshold: 5,
 		},
+		{
+			name: "valid-minimum-reminder-interval-0",
+			alert: Alert{
+				MinimumReminderInterval: 0,
+				FailureThreshold:        10,
+				SuccessThreshold:        5,
+			},
+			expectedError:            nil,
+			expectedFailureThreshold: 10,
+			expectedSuccessThreshold: 5,
+		},
+		{
+			name: "valid-minimum-reminder-interval-5m",
+			alert: Alert{
+				MinimumReminderInterval: 5 * time.Minute,
+				FailureThreshold:        10,
+				SuccessThreshold:        5,
+			},
+			expectedError:            nil,
+			expectedFailureThreshold: 10,
+			expectedSuccessThreshold: 5,
+		},
+		{
+			name: "valid-minimum-reminder-interval-10m",
+			alert: Alert{
+				MinimumReminderInterval: 10 * time.Minute,
+				FailureThreshold:        10,
+				SuccessThreshold:        5,
+			},
+			expectedError:            nil,
+			expectedFailureThreshold: 10,
+			expectedSuccessThreshold: 5,
+		},
+		{
+			name: "invalid-minimum-reminder-interval-1m",
+			alert: Alert{
+				MinimumReminderInterval: 1 * time.Minute,
+				FailureThreshold:        10,
+				SuccessThreshold:        5,
+			},
+			expectedError:            ErrAlertWithInvalidMinimumReminderInterval,
+			expectedFailureThreshold: 10,
+			expectedSuccessThreshold: 5,
+		},
+		{
+			name: "invalid-minimum-reminder-interval-1s",
+			alert: Alert{
+				MinimumReminderInterval: 1 * time.Second,
+				FailureThreshold:        10,
+				SuccessThreshold:        5,
+			},
+			expectedError:            ErrAlertWithInvalidMinimumReminderInterval,
+			expectedFailureThreshold: 10,
+			expectedSuccessThreshold: 5,
+		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.name, func(t *testing.T) {

alerting/alert/type.go

@@ -11,6 +11,9 @@ const (
 	// TypeCustom is the Type for the custom alerting provider
 	TypeCustom Type = "custom"
 
+	// TypeDatadog is the Type for the datadog alerting provider
+	TypeDatadog Type = "datadog"
+
 	// TypeDiscord is the Type for the discord alerting provider
 	TypeDiscord Type = "discord"
 
@@ -32,9 +35,12 @@ const (
 	// TypeGotify is the Type for the gotify alerting provider
 	TypeGotify Type = "gotify"
 
-  // TypeHomeAssistant is the Type for the homeassistant alerting provider
+	// TypeHomeAssistant is the Type for the homeassistant alerting provider
 	TypeHomeAssistant Type = "homeassistant"
-  
+
+	// TypeIFTTT is the Type for the ifttt alerting provider
+	TypeIFTTT Type = "ifttt"
+
 	// TypeIlert is the Type for the ilert alerting provider
 	TypeIlert Type = "ilert"
 
@@ -44,6 +50,9 @@ const (
 	// TypeJetBrainsSpace is the Type for the jetbrains alerting provider
 	TypeJetBrainsSpace Type = "jetbrainsspace"
 
+	// TypeLine is the Type for the line alerting provider
+	TypeLine Type = "line"
+
 	// TypeMatrix is the Type for the matrix alerting provider
 	TypeMatrix Type = "matrix"
 
@@ -53,6 +62,9 @@ const (
 	// TypeMessagebird is the Type for the messagebird alerting provider
 	TypeMessagebird Type = "messagebird"
 
+	// TypeNewRelic is the Type for the newrelic alerting provider
+	TypeNewRelic Type = "newrelic"
+
 	// TypeNtfy is the Type for the ntfy alerting provider
 	TypeNtfy Type = "ntfy"
 
@@ -62,12 +74,33 @@ const (
 	// TypePagerDuty is the Type for the pagerduty alerting provider
 	TypePagerDuty Type = "pagerduty"
 
+	// TypePlivo is the Type for the plivo alerting provider
+	TypePlivo Type = "plivo"
+
 	// TypePushover is the Type for the pushover alerting provider
 	TypePushover Type = "pushover"
 
+	// TypeRocketChat is the Type for the rocketchat alerting provider
+	TypeRocketChat Type = "rocketchat"
+
+	// TypeSendGrid is the Type for the sendgrid alerting provider
+	TypeSendGrid Type = "sendgrid"
+
+	// TypeSignal is the Type for the signal alerting provider
+	TypeSignal Type = "signal"
+
+	// TypeSIGNL4 is the Type for the signl4 alerting provider
+	TypeSIGNL4 Type = "signl4"
+
 	// TypeSlack is the Type for the slack alerting provider
 	TypeSlack Type = "slack"
 
+	// TypeSplunk is the Type for the splunk alerting provider
+	TypeSplunk Type = "splunk"
+
+	// TypeSquadcast is the Type for the squadcast alerting provider
+	TypeSquadcast Type = "squadcast"
+
 	// TypeTeams is the Type for the teams alerting provider
 	TypeTeams Type = "teams"
 
@@ -80,6 +113,15 @@ const (
 	// TypeTwilio is the Type for the twilio alerting provider
 	TypeTwilio Type = "twilio"
 
+	// TypeVonage is the Type for the vonage alerting provider
+	TypeVonage Type = "vonage"
+
+	// TypeWebex is the Type for the webex alerting provider
+	TypeWebex Type = "webex"
+
+	// TypeZapier is the Type for the zapier alerting provider
+	TypeZapier Type = "zapier"
+
 	// TypeZulip is the Type for the Zulip alerting provider
 	TypeZulip Type = "zulip"
 )

alerting/config.go

@@ -8,6 +8,7 @@ import (
 	"github.com/TwiN/gatus/v5/alerting/provider"
 	"github.com/TwiN/gatus/v5/alerting/provider/awsses"
 	"github.com/TwiN/gatus/v5/alerting/provider/custom"
+	"github.com/TwiN/gatus/v5/alerting/provider/datadog"
 	"github.com/TwiN/gatus/v5/alerting/provider/discord"
 	"github.com/TwiN/gatus/v5/alerting/provider/email"
 	"github.com/TwiN/gatus/v5/alerting/provider/gitea"
@@ -15,22 +16,35 @@ import (
 	"github.com/TwiN/gatus/v5/alerting/provider/gitlab"
 	"github.com/TwiN/gatus/v5/alerting/provider/googlechat"
 	"github.com/TwiN/gatus/v5/alerting/provider/gotify"
-  "github.com/TwiN/gatus/v5/alerting/provider/homeassistant"
-  "github.com/TwiN/gatus/v5/alerting/provider/ilert"
+	"github.com/TwiN/gatus/v5/alerting/provider/homeassistant"
+	"github.com/TwiN/gatus/v5/alerting/provider/ifttt"
+	"github.com/TwiN/gatus/v5/alerting/provider/ilert"
 	"github.com/TwiN/gatus/v5/alerting/provider/incidentio"
 	"github.com/TwiN/gatus/v5/alerting/provider/jetbrainsspace"
+	"github.com/TwiN/gatus/v5/alerting/provider/line"
 	"github.com/TwiN/gatus/v5/alerting/provider/matrix"
 	"github.com/TwiN/gatus/v5/alerting/provider/mattermost"
 	"github.com/TwiN/gatus/v5/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v5/alerting/provider/newrelic"
 	"github.com/TwiN/gatus/v5/alerting/provider/ntfy"
 	"github.com/TwiN/gatus/v5/alerting/provider/opsgenie"
 	"github.com/TwiN/gatus/v5/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v5/alerting/provider/plivo"
 	"github.com/TwiN/gatus/v5/alerting/provider/pushover"
+	"github.com/TwiN/gatus/v5/alerting/provider/rocketchat"
+	"github.com/TwiN/gatus/v5/alerting/provider/sendgrid"
+	"github.com/TwiN/gatus/v5/alerting/provider/signal"
+	"github.com/TwiN/gatus/v5/alerting/provider/signl4"
 	"github.com/TwiN/gatus/v5/alerting/provider/slack"
+	"github.com/TwiN/gatus/v5/alerting/provider/splunk"
+	"github.com/TwiN/gatus/v5/alerting/provider/squadcast"
 	"github.com/TwiN/gatus/v5/alerting/provider/teams"
 	"github.com/TwiN/gatus/v5/alerting/provider/teamsworkflows"
 	"github.com/TwiN/gatus/v5/alerting/provider/telegram"
 	"github.com/TwiN/gatus/v5/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v5/alerting/provider/vonage"
+	"github.com/TwiN/gatus/v5/alerting/provider/webex"
+	"github.com/TwiN/gatus/v5/alerting/provider/zapier"
 	"github.com/TwiN/gatus/v5/alerting/provider/zulip"
 	"github.com/TwiN/logr"
 )
@@ -43,12 +57,16 @@ type Config struct {
 	// Custom is the configuration for the custom alerting provider
 	Custom *custom.AlertProvider `yaml:"custom,omitempty"`
 
+	// Datadog is the configuration for the datadog alerting provider
+	Datadog *datadog.AlertProvider `yaml:"datadog,omitempty"`
+
 	// Discord is the configuration for the discord alerting provider
 	Discord *discord.AlertProvider `yaml:"discord,omitempty"`
 
 	// Email is the configuration for the email alerting provider
 	Email *email.AlertProvider `yaml:"email,omitempty"`
 
+
 	// GitHub is the configuration for the github alerting provider
 	GitHub *github.AlertProvider `yaml:"github,omitempty"`
 
@@ -66,6 +84,9 @@ type Config struct {
   
 	// HomeAssistant is the configuration for the homeassistant alerting provider
 	HomeAssistant *homeassistant.AlertProvider `yaml:"homeassistant,omitempty"`
+
+	// IFTTT is the configuration for the ifttt alerting provider
+	IFTTT *ifttt.AlertProvider `yaml:"ifttt,omitempty"`
   
 	// Ilert is the configuration for the ilert alerting provider
 	Ilert *ilert.AlertProvider `yaml:"ilert,omitempty"`
@@ -76,6 +97,9 @@ type Config struct {
 	// JetBrainsSpace is the configuration for the jetbrains space alerting provider
 	JetBrainsSpace *jetbrainsspace.AlertProvider `yaml:"jetbrainsspace,omitempty"`
 
+	// Line is the configuration for the line alerting provider
+	Line *line.AlertProvider `yaml:"line,omitempty"`
+
 	// Matrix is the configuration for the matrix alerting provider
 	Matrix *matrix.AlertProvider `yaml:"matrix,omitempty"`
 
@@ -85,6 +109,9 @@ type Config struct {
 	// Messagebird is the configuration for the messagebird alerting provider
 	Messagebird *messagebird.AlertProvider `yaml:"messagebird,omitempty"`
 
+	// NewRelic is the configuration for the newrelic alerting provider
+	NewRelic *newrelic.AlertProvider `yaml:"newrelic,omitempty"`
+
 	// Ntfy is the configuration for the ntfy alerting provider
 	Ntfy *ntfy.AlertProvider `yaml:"ntfy,omitempty"`
 
@@ -94,12 +121,33 @@ type Config struct {
 	// PagerDuty is the configuration for the pagerduty alerting provider
 	PagerDuty *pagerduty.AlertProvider `yaml:"pagerduty,omitempty"`
 
+	// Plivo is the configuration for the plivo alerting provider
+	Plivo *plivo.AlertProvider `yaml:"plivo,omitempty"`
+
 	// Pushover is the configuration for the pushover alerting provider
 	Pushover *pushover.AlertProvider `yaml:"pushover,omitempty"`
 
+	// RocketChat is the configuration for the rocketchat alerting provider
+	RocketChat *rocketchat.AlertProvider `yaml:"rocketchat,omitempty"`
+
+	// SendGrid is the configuration for the sendgrid alerting provider
+	SendGrid *sendgrid.AlertProvider `yaml:"sendgrid,omitempty"`
+
+	// Signal is the configuration for the signal alerting provider
+	Signal *signal.AlertProvider `yaml:"signal,omitempty"`
+
+	// SIGNL4 is the configuration for the signl4 alerting provider
+	SIGNL4 *signl4.AlertProvider `yaml:"signl4,omitempty"`
+
 	// Slack is the configuration for the slack alerting provider
 	Slack *slack.AlertProvider `yaml:"slack,omitempty"`
 
+	// Splunk is the configuration for the splunk alerting provider
+	Splunk *splunk.AlertProvider `yaml:"splunk,omitempty"`
+
+	// Squadcast is the configuration for the squadcast alerting provider
+	Squadcast *squadcast.AlertProvider `yaml:"squadcast,omitempty"`
+
 	// Teams is the configuration for the teams alerting provider
 	Teams *teams.AlertProvider `yaml:"teams,omitempty"`
 
@@ -112,6 +160,15 @@ type Config struct {
 	// Twilio is the configuration for the twilio alerting provider
 	Twilio *twilio.AlertProvider `yaml:"twilio,omitempty"`
 
+	// Vonage is the configuration for the vonage alerting provider
+	Vonage *vonage.AlertProvider `yaml:"vonage,omitempty"`
+
+	// Webex is the configuration for the webex alerting provider
+	Webex *webex.AlertProvider `yaml:"webex,omitempty"`
+
+	// Zapier is the configuration for the zapier alerting provider
+	Zapier *zapier.AlertProvider `yaml:"zapier,omitempty"`
+
 	// Zulip is the configuration for the zulip alerting provider
 	Zulip *zulip.AlertProvider `yaml:"zulip,omitempty"`
 }

alerting/provider/datadog/datadog.go

@@ -0,0 +1,214 @@
+package datadog
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrAPIKeyNotSet           = errors.New("api-key not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	APIKey string   `yaml:"api-key"`        // Datadog API key
+	Site   string   `yaml:"site,omitempty"` // Datadog site (e.g., datadoghq.com, datadoghq.eu)
+	Tags   []string `yaml:"tags,omitempty"` // Additional tags to include
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.APIKey) == 0 {
+		return ErrAPIKeyNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.APIKey) > 0 {
+		cfg.APIKey = override.APIKey
+	}
+	if len(override.Site) > 0 {
+		cfg.Site = override.Site
+	}
+	if len(override.Tags) > 0 {
+		cfg.Tags = override.Tags
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Datadog
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	site := cfg.Site
+	if site == "" {
+		site = "datadoghq.com"
+	}
+	body, err := provider.buildRequestBody(cfg, ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	url := fmt.Sprintf("https://api.%s/api/v1/events", site)
+	request, err := http.NewRequest(http.MethodPost, url, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	request.Header.Set("DD-API-KEY", cfg.APIKey)
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to datadog alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type Body struct {
+	Title        string   `json:"title"`
+	Text         string   `json:"text"`
+	Priority     string   `json:"priority"`
+	Tags         []string `json:"tags"`
+	AlertType    string   `json:"alert_type"`
+	SourceType   string   `json:"source_type_name"`
+	DateHappened int64    `json:"date_happened,omitempty"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var title, text, priority, alertType string
+	if resolved {
+		title = fmt.Sprintf("Resolved: %s", ep.DisplayName())
+		text = fmt.Sprintf("Alert for %s has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+		priority = "normal"
+		alertType = "success"
+	} else {
+		title = fmt.Sprintf("Alert: %s", ep.DisplayName())
+		text = fmt.Sprintf("Alert for %s has been triggered due to having failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+		priority = "normal"
+		alertType = "error"
+	}
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		text += fmt.Sprintf("\n\nDescription: %s", alertDescription)
+	}
+	if len(result.ConditionResults) > 0 {
+		text += "\n\nCondition Results:"
+		for _, conditionResult := range result.ConditionResults {
+			var status string
+			if conditionResult.Success {
+				status = "✅"
+			} else {
+				status = "❌"
+			}
+			text += fmt.Sprintf("\n%s %s", status, conditionResult.Condition)
+		}
+	}
+	tags := []string{
+		"source:gatus",
+		fmt.Sprintf("endpoint:%s", ep.Name),
+		fmt.Sprintf("status:%s", alertType),
+	}
+	if ep.Group != "" {
+		tags = append(tags, fmt.Sprintf("group:%s", ep.Group))
+	}
+	// Append custom tags
+	if len(cfg.Tags) > 0 {
+		tags = append(tags, cfg.Tags...)
+	}
+	body := Body{
+		Title:        title,
+		Text:         text,
+		Priority:     priority,
+		Tags:         tags,
+		AlertType:    alertType,
+		SourceType:   "gatus",
+		DateHappened: time.Now().Unix(),
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/datadog/datadog_test.go

@@ -0,0 +1,183 @@
+package datadog
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid-us1",
+			provider: AlertProvider{DefaultConfig: Config{APIKey: "dd-api-key-123", Site: "datadoghq.com"}},
+			expected: nil,
+		},
+		{
+			name:     "valid-eu",
+			provider: AlertProvider{DefaultConfig: Config{APIKey: "dd-api-key-123", Site: "datadoghq.eu"}},
+			expected: nil,
+		},
+		{
+			name:     "valid-with-tags",
+			provider: AlertProvider{DefaultConfig: Config{APIKey: "dd-api-key-123", Site: "datadoghq.com", Tags: []string{"env:prod", "service:gatus"}}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-api-key",
+			provider: AlertProvider{DefaultConfig: Config{Site: "datadoghq.com"}},
+			expected: ErrAPIKeyNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{APIKey: "dd-api-key-123", Site: "datadoghq.com"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.Host != "api.datadoghq.com" {
+					t.Errorf("expected host api.datadoghq.com, got %s", r.Host)
+				}
+				if r.URL.Path != "/api/v1/events" {
+					t.Errorf("expected path /api/v1/events, got %s", r.URL.Path)
+				}
+				if r.Header.Get("DD-API-KEY") != "dd-api-key-123" {
+					t.Errorf("expected DD-API-KEY header to be 'dd-api-key-123', got %s", r.Header.Get("DD-API-KEY"))
+				}
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["title"] == nil {
+					t.Error("expected 'title' field in request body")
+				}
+				title := body["title"].(string)
+				if !strings.Contains(title, "Alert") {
+					t.Errorf("expected title to contain 'Alert', got %s", title)
+				}
+				if body["alert_type"] != "error" {
+					t.Errorf("expected alert_type to be 'error', got %v", body["alert_type"])
+				}
+				if body["priority"] != "normal" {
+					t.Errorf("expected priority to be 'normal', got %v", body["priority"])
+				}
+				text := body["text"].(string)
+				if !strings.Contains(text, "failed 3 time(s)") {
+					t.Errorf("expected text to contain failure count, got %s", text)
+				}
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "triggered-with-tags",
+			provider: AlertProvider{DefaultConfig: Config{APIKey: "dd-api-key-123", Site: "datadoghq.com", Tags: []string{"env:prod", "service:gatus"}}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				tags := body["tags"].([]interface{})
+				// Datadog adds 3 base tags (source, endpoint, status) + custom tags
+				if len(tags) < 5 {
+					t.Errorf("expected at least 5 tags (3 base + 2 custom), got %d", len(tags))
+				}
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{APIKey: "dd-api-key-123", Site: "datadoghq.eu"}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.Host != "api.datadoghq.eu" {
+					t.Errorf("expected host api.datadoghq.eu, got %s", r.Host)
+				}
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				title := body["title"].(string)
+				if !strings.Contains(title, "Resolved") {
+					t.Errorf("expected title to contain 'Resolved', got %s", title)
+				}
+				if body["alert_type"] != "success" {
+					t.Errorf("expected alert_type to be 'success', got %v", body["alert_type"])
+				}
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{APIKey: "dd-api-key-123", Site: "datadoghq.com"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusForbidden, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

alerting/provider/email/email.go

@@ -166,7 +166,14 @@ func (provider *AlertProvider) buildMessageSubjectAndBody(ep *endpoint.Endpoint,
 	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
 		description = "\n\nAlert description: " + alertDescription
 	}
-	return subject, message + description + formattedConditionResults
+	var extraLabels string
+	if len(ep.ExtraLabels) > 0 {
+		extraLabels = "\n\nExtra labels:\n"
+		for key, value := range ep.ExtraLabels {
+			extraLabels += fmt.Sprintf("  %s: %s\n", key, value)
+		}
+	}
+	return subject, message + description + extraLabels + formattedConditionResults
 }
 
 // GetDefaultAlert returns the provider's default alert configuration

alerting/provider/email/email_test.go

@@ -76,6 +76,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 		Provider        AlertProvider
 		Alert           alert.Alert
 		Resolved        bool
+		Endpoint        *endpoint.Endpoint
 		ExpectedSubject string
 		ExpectedBody    string
 	}{
@@ -84,6 +85,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:        AlertProvider{},
 			Alert:           alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:        false,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name"},
 			ExpectedSubject: "[endpoint-name] Alert triggered",
 			ExpectedBody:    "An alert for endpoint-name has been triggered due to having failed 3 time(s) in a row\n\nAlert description: description-1\n\nCondition results:\n❌ [CONNECTED] == true\n❌ [STATUS] == 200\n",
 		},
@@ -92,14 +94,42 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:        AlertProvider{},
 			Alert:           alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:        true,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name"},
 			ExpectedSubject: "[endpoint-name] Alert resolved",
 			ExpectedBody:    "An alert for endpoint-name has been resolved after passing successfully 5 time(s) in a row\n\nAlert description: description-2\n\nCondition results:\n✅ [CONNECTED] == true\n✅ [STATUS] == 200\n",
 		},
+		{
+			Name:            "triggered-with-single-extra-label",
+			Provider:        AlertProvider{},
+			Alert:           alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        false,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name", ExtraLabels: map[string]string{"environment": "production"}},
+			ExpectedSubject: "[endpoint-name] Alert triggered",
+			ExpectedBody:    "An alert for endpoint-name has been triggered due to having failed 3 time(s) in a row\n\nAlert description: description-1\n\nExtra labels:\n  environment: production\n\n\nCondition results:\n❌ [CONNECTED] == true\n❌ [STATUS] == 200\n",
+		},
+		{
+			Name:            "resolved-with-single-extra-label",
+			Provider:        AlertProvider{},
+			Alert:           alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        true,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name", ExtraLabels: map[string]string{"service": "api"}},
+			ExpectedSubject: "[endpoint-name] Alert resolved",
+			ExpectedBody:    "An alert for endpoint-name has been resolved after passing successfully 5 time(s) in a row\n\nAlert description: description-2\n\nExtra labels:\n  service: api\n\n\nCondition results:\n✅ [CONNECTED] == true\n✅ [STATUS] == 200\n",
+		},
+		{
+			Name:            "triggered-with-no-extra-labels",
+			Provider:        AlertProvider{},
+			Alert:           alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        false,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name", ExtraLabels: map[string]string{}},
+			ExpectedSubject: "[endpoint-name] Alert triggered",
+			ExpectedBody:    "An alert for endpoint-name has been triggered due to having failed 3 time(s) in a row\n\nAlert description: description-1\n\nCondition results:\n❌ [CONNECTED] == true\n❌ [STATUS] == 200\n",
+		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {
 			subject, body := scenario.Provider.buildMessageSubjectAndBody(
-				&endpoint.Endpoint{Name: "endpoint-name"},
+				scenario.Endpoint,
 				&scenario.Alert,
 				&endpoint.Result{
 					ConditionResults: []*endpoint.ConditionResult{

alerting/provider/ifttt/ifttt.go

@@ -0,0 +1,187 @@
+package ifttt
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrWebhookKeyNotSet       = errors.New("webhook-key not set")
+	ErrEventNameNotSet        = errors.New("event-name not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	WebhookKey string `yaml:"webhook-key"` // IFTTT Webhook key
+	EventName  string `yaml:"event-name"`  // IFTTT event name
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.WebhookKey) == 0 {
+		return ErrWebhookKeyNotSet
+	}
+	if len(cfg.EventName) == 0 {
+		return ErrEventNameNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.WebhookKey) > 0 {
+		cfg.WebhookKey = override.WebhookKey
+	}
+	if len(override.EventName) > 0 {
+		cfg.EventName = override.EventName
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using IFTTT
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	url := fmt.Sprintf("https://maker.ifttt.com/trigger/%s/with/key/%s", cfg.EventName, cfg.WebhookKey)
+	body, err := provider.buildRequestBody(ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	request, err := http.NewRequest(http.MethodPost, url, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to ifttt alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return err
+}
+
+type Body struct {
+	Value1 string `json:"value1"` // Alert status/title
+	Value2 string `json:"value2"` // Alert message
+	Value3 string `json:"value3"` // Additional details
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var value1, value2, value3 string
+	if resolved {
+		value1 = fmt.Sprintf("✅ RESOLVED: %s", ep.DisplayName())
+		value2 = fmt.Sprintf("Alert has been resolved after passing successfully %d time(s) in a row", alert.SuccessThreshold)
+	} else {
+		value1 = fmt.Sprintf("🚨 ALERT: %s", ep.DisplayName())
+		value2 = fmt.Sprintf("Endpoint has failed %d time(s) in a row", alert.FailureThreshold)
+	}
+	// Build additional details
+	value3 = fmt.Sprintf("Endpoint: %s", ep.DisplayName())
+	if ep.Group != "" {
+		value3 += fmt.Sprintf(" | Group: %s", ep.Group)
+	}
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		value3 += fmt.Sprintf(" | Description: %s", alertDescription)
+	}
+	// Add condition results summary
+	if len(result.ConditionResults) > 0 {
+		successCount := 0
+		for _, conditionResult := range result.ConditionResults {
+			if conditionResult.Success {
+				successCount++
+			}
+		}
+		value3 += fmt.Sprintf(" | Conditions: %d/%d passed", successCount, len(result.ConditionResults))
+	}
+	body := Body{
+		Value1: value1,
+		Value2: value2,
+		Value3: value3,
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/ifttt/ifttt_test.go

@@ -0,0 +1,154 @@
+package ifttt
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{WebhookKey: "ifttt-webhook-key-123", EventName: "gatus_alert"}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-webhook-key",
+			provider: AlertProvider{DefaultConfig: Config{EventName: "gatus_alert"}},
+			expected: ErrWebhookKeyNotSet,
+		},
+		{
+			name:     "invalid-event-name",
+			provider: AlertProvider{DefaultConfig: Config{WebhookKey: "ifttt-webhook-key-123"}},
+			expected: ErrEventNameNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{WebhookKey: "ifttt-webhook-key-123", EventName: "gatus_alert"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.Host != "maker.ifttt.com" {
+					t.Errorf("expected host maker.ifttt.com, got %s", r.Host)
+				}
+				if r.URL.Path != "/trigger/gatus_alert/with/key/ifttt-webhook-key-123" {
+					t.Errorf("expected path /trigger/gatus_alert/with/key/ifttt-webhook-key-123, got %s", r.URL.Path)
+				}
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				value1 := body["value1"].(string)
+				if !strings.Contains(value1, "ALERT") {
+					t.Errorf("expected value1 to contain 'ALERT', got %s", value1)
+				}
+				value2 := body["value2"].(string)
+				if !strings.Contains(value2, "failed 3 time(s)") {
+					t.Errorf("expected value2 to contain failure count, got %s", value2)
+				}
+				value3 := body["value3"].(string)
+				if !strings.Contains(value3, "Endpoint: endpoint-name") {
+					t.Errorf("expected value3 to contain endpoint details, got %s", value3)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{WebhookKey: "ifttt-webhook-key-123", EventName: "gatus_resolved"}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.URL.Path != "/trigger/gatus_resolved/with/key/ifttt-webhook-key-123" {
+					t.Errorf("expected path /trigger/gatus_resolved/with/key/ifttt-webhook-key-123, got %s", r.URL.Path)
+				}
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				value1 := body["value1"].(string)
+				if !strings.Contains(value1, "RESOLVED") {
+					t.Errorf("expected value1 to contain 'RESOLVED', got %s", value1)
+				}
+				value3 := body["value3"].(string)
+				if !strings.Contains(value3, "Endpoint: endpoint-name") {
+					t.Errorf("expected value3 to contain endpoint details, got %s", value3)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{WebhookKey: "ifttt-webhook-key-123", EventName: "gatus_alert"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusUnauthorized, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

alerting/provider/ilert/ilert_test.go

@@ -174,21 +174,21 @@ func TestAlertProvider_BuildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{DefaultConfig: Config{IntegrationKey: "some-integration-key"}},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 3, FailureThreshold: 3, ResolveKey: "123", Type: "ilert", SendOnResolved: &sendOnResolved},
 			Resolved:     false,
-			ExpectedBody: `{"alert":{"Type":"ilert","Enabled":null,"FailureThreshold":3,"SuccessThreshold":3,"Description":"description-1","SendOnResolved":true,"ProviderOverride":null,"ResolveKey":"123","Triggered":false},"name":"endpoint-name","group":"","status":"firing","title":"endpoint-name","details":"description-1","condition_results":[{"condition":"[CONNECTED] == true","success":false},{"condition":"[STATUS] == 200","success":false}],"url":""}`,
+			ExpectedBody: `{"alert":{"Type":"ilert","Enabled":null,"FailureThreshold":3,"SuccessThreshold":3,"MinimumReminderInterval":0,"Description":"description-1","SendOnResolved":true,"ProviderOverride":null,"ResolveKey":"123","Triggered":false},"name":"endpoint-name","group":"","status":"firing","title":"endpoint-name","details":"description-1","condition_results":[{"condition":"[CONNECTED] == true","success":false},{"condition":"[STATUS] == 200","success":false}],"url":""}`,
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{DefaultConfig: Config{IntegrationKey: "some-integration-key"}},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 4, FailureThreshold: 3, ResolveKey: "123", Type: "ilert", SendOnResolved: &sendOnResolved},
 			Resolved:     true,
-			ExpectedBody: `{"alert":{"Type":"ilert","Enabled":null,"FailureThreshold":3,"SuccessThreshold":4,"Description":"description-1","SendOnResolved":true,"ProviderOverride":null,"ResolveKey":"123","Triggered":false},"name":"endpoint-name","group":"","status":"resolved","title":"endpoint-name","details":"description-1","condition_results":[{"condition":"[CONNECTED] == true","success":true},{"condition":"[STATUS] == 200","success":true}],"url":""}`,
+			ExpectedBody: `{"alert":{"Type":"ilert","Enabled":null,"FailureThreshold":3,"SuccessThreshold":4,"MinimumReminderInterval":0,"Description":"description-1","SendOnResolved":true,"ProviderOverride":null,"ResolveKey":"123","Triggered":false},"name":"endpoint-name","group":"","status":"resolved","title":"endpoint-name","details":"description-1","condition_results":[{"condition":"[CONNECTED] == true","success":true},{"condition":"[STATUS] == 200","success":true}],"url":""}`,
 		},
 		{
 			Name:         "group-override",
 			Provider:     AlertProvider{DefaultConfig: Config{IntegrationKey: "some-integration-key"}, Overrides: []Override{{Group: "g", Config: Config{IntegrationKey: "different-integration-key"}}}},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3, ResolveKey: "123", Type: "ilert", SendOnResolved: &sendOnResolved},
 			Resolved:     false,
-			ExpectedBody: `{"alert":{"Type":"ilert","Enabled":null,"FailureThreshold":3,"SuccessThreshold":5,"Description":"description-2","SendOnResolved":true,"ProviderOverride":null,"ResolveKey":"123","Triggered":false},"name":"endpoint-name","group":"","status":"firing","title":"endpoint-name","details":"description-2","condition_results":[{"condition":"[CONNECTED] == true","success":false},{"condition":"[STATUS] == 200","success":false}],"url":""}`,
+			ExpectedBody: `{"alert":{"Type":"ilert","Enabled":null,"FailureThreshold":3,"SuccessThreshold":5,"MinimumReminderInterval":0,"Description":"description-2","SendOnResolved":true,"ProviderOverride":null,"ResolveKey":"123","Triggered":false},"name":"endpoint-name","group":"","status":"firing","title":"endpoint-name","details":"description-2","condition_results":[{"condition":"[CONNECTED] == true","success":false},{"condition":"[STATUS] == 200","success":false}],"url":""}`,
 		},
 	}
 

alerting/provider/line/line.go

@@ -0,0 +1,193 @@
+package line
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrChannelAccessTokenNotSet = errors.New("channel-access-token not set")
+	ErrUserIDsNotSet            = errors.New("user-ids not set")
+	ErrDuplicateGroupOverride   = errors.New("duplicate group override")
+)
+
+type Config struct {
+	ChannelAccessToken string   `yaml:"channel-access-token"` // Line Messaging API channel access token
+	UserIDs            []string `yaml:"user-ids"`             // List of Line user IDs to send messages to
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.ChannelAccessToken) == 0 {
+		return ErrChannelAccessTokenNotSet
+	}
+	if len(cfg.UserIDs) == 0 {
+		return ErrUserIDsNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.ChannelAccessToken) > 0 {
+		cfg.ChannelAccessToken = override.ChannelAccessToken
+	}
+	if len(override.UserIDs) > 0 {
+		cfg.UserIDs = override.UserIDs
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Line
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	for _, userID := range cfg.UserIDs {
+		body, err := provider.buildRequestBody(ep, alert, result, resolved, userID)
+		if err != nil {
+			return err
+		}
+		buffer := bytes.NewBuffer(body)
+		request, err := http.NewRequest(http.MethodPost, "https://api.line.me/v2/bot/message/push", buffer)
+		if err != nil {
+			return err
+		}
+		request.Header.Set("Content-Type", "application/json")
+		request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.ChannelAccessToken))
+		response, err := client.GetHTTPClient(nil).Do(request)
+		if err != nil {
+			return err
+		}
+		if response.StatusCode >= 400 {
+			body, _ := io.ReadAll(response.Body)
+			response.Body.Close()
+			return fmt.Errorf("call to line alert returned status code %d: %s", response.StatusCode, string(body))
+		}
+		response.Body.Close()
+	}
+	return nil
+}
+
+type Body struct {
+	To       string    `json:"to"`
+	Messages []Message `json:"messages"`
+}
+
+type Message struct {
+	Type string `json:"type"`
+	Text string `json:"text"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool, userID string) ([]byte, error) {
+	var message string
+	if resolved {
+		message = fmt.Sprintf("✅ RESOLVED: %s\n\nAlert has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+	} else {
+		message = fmt.Sprintf("⚠️ ALERT: %s\n\nEndpoint has failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+	}
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		message += fmt.Sprintf("\n\nDescription: %s", alertDescription)
+	}
+	if len(result.ConditionResults) > 0 {
+		message += "\n\nCondition Results:"
+		for _, conditionResult := range result.ConditionResults {
+			var status string
+			if conditionResult.Success {
+				status = "✅"
+			} else {
+				status = "❌"
+			}
+			message += fmt.Sprintf("\n%s %s", status, conditionResult.Condition)
+		}
+	}
+	body := Body{
+		To: userID,
+		Messages: []Message{
+			{
+				Type: "text",
+				Text: message,
+			},
+		},
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/line/line_test.go

@@ -0,0 +1,147 @@
+package line
+
+import (
+	"encoding/json"
+	"net/http"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{ChannelAccessToken: "token123", UserIDs: []string{"U123"}}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-channel-access-token",
+			provider: AlertProvider{DefaultConfig: Config{UserIDs: []string{"U123"}}},
+			expected: ErrChannelAccessTokenNotSet,
+		},
+		{
+			name:     "invalid-user-ids",
+			provider: AlertProvider{DefaultConfig: Config{ChannelAccessToken: "token123"}},
+			expected: ErrUserIDsNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{ChannelAccessToken: "token123", UserIDs: []string{"U123", "U456"}}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.URL.Path != "/v2/bot/message/push" {
+					t.Errorf("expected path /v2/bot/message/push, got %s", r.URL.Path)
+				}
+				if r.Header.Get("Authorization") != "Bearer token123" {
+					t.Errorf("expected Authorization header to be 'Bearer token123', got %s", r.Header.Get("Authorization"))
+				}
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["to"] == nil {
+					t.Error("expected 'to' field in request body")
+				}
+				messages := body["messages"].([]interface{})
+				if len(messages) != 1 {
+					t.Errorf("expected 1 message, got %d", len(messages))
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{ChannelAccessToken: "token123", UserIDs: []string{"U123"}}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				messages := body["messages"].([]interface{})
+				message := messages[0].(map[string]interface{})
+				text := message["text"].(string)
+				if !contains(text, "RESOLVED") {
+					t.Errorf("expected message to contain 'RESOLVED', got %s", text)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{ChannelAccessToken: "token123", UserIDs: []string{"U123"}}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusBadRequest, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}
+
+func contains(s, substr string) bool {
+	return len(s) >= len(substr) && s[0:len(substr)] == substr || len(s) > len(substr) && contains(s[1:], substr)
+}

alerting/provider/matrix/matrix.go

@@ -9,7 +9,6 @@ import (
 	"math/rand"
 	"net/http"
 	"net/url"
-	"time"
 
 	"github.com/TwiN/gatus/v5/alerting/alert"
 	"github.com/TwiN/gatus/v5/client"
@@ -203,7 +202,6 @@ func randStringBytes(n int) string {
 	// All the compatible characters to use in a transaction ID
 	const availableCharacterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
 	b := make([]byte, n)
-	rand.Seed(time.Now().UnixNano())
 	for i := range b {
 		b[i] = availableCharacterBytes[rand.Intn(len(availableCharacterBytes))]
 	}

alerting/provider/newrelic/newrelic.go

@@ -0,0 +1,215 @@
+package newrelic
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrInsertKeyNotSet        = errors.New("insert-key not set")
+	ErrAccountIDNotSet        = errors.New("account-id not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	InsertKey string `yaml:"insert-key"`       // New Relic Insert key
+	AccountID string `yaml:"account-id"`       // New Relic account ID
+	Region    string `yaml:"region,omitempty"` // Region (US or EU, defaults to US)
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.InsertKey) == 0 {
+		return ErrInsertKeyNotSet
+	}
+	if len(cfg.AccountID) == 0 {
+		return ErrAccountIDNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.InsertKey) > 0 {
+		cfg.InsertKey = override.InsertKey
+	}
+	if len(override.AccountID) > 0 {
+		cfg.AccountID = override.AccountID
+	}
+	if len(override.Region) > 0 {
+		cfg.Region = override.Region
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using New Relic
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	// Determine the API endpoint based on region
+	var apiHost string
+	if cfg.Region == "EU" {
+		apiHost = "insights-collector.eu01.nr-data.net"
+	} else {
+		apiHost = "insights-collector.newrelic.com"
+	}
+	body, err := provider.buildRequestBody(cfg, ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	url := fmt.Sprintf("https://%s/v1/accounts/%s/events", apiHost, cfg.AccountID)
+	request, err := http.NewRequest(http.MethodPost, url, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	request.Header.Set("X-Insert-Key", cfg.InsertKey)
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to newrelic alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type Event struct {
+	EventType   string  `json:"eventType"`
+	Timestamp   int64   `json:"timestamp"`
+	Service     string  `json:"service"`
+	Endpoint    string  `json:"endpoint"`
+	Group       string  `json:"group,omitempty"`
+	AlertStatus string  `json:"alertStatus"`
+	Message     string  `json:"message"`
+	Description string  `json:"description,omitempty"`
+	Severity    string  `json:"severity"`
+	Source      string  `json:"source"`
+	SuccessRate float64 `json:"successRate,omitempty"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var alertStatus, severity, message string
+	var successRate float64
+	if resolved {
+		alertStatus = "resolved"
+		severity = "INFO"
+		message = fmt.Sprintf("Alert for %s has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+		successRate = 100
+	} else {
+		alertStatus = "triggered"
+		severity = "CRITICAL"
+		message = fmt.Sprintf("Alert for %s has been triggered due to having failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+		successRate = 0
+	}
+	// Calculate success rate from condition results
+	if len(result.ConditionResults) > 0 {
+		successCount := 0
+		for _, conditionResult := range result.ConditionResults {
+			if conditionResult.Success {
+				successCount++
+			}
+		}
+		successRate = float64(successCount) / float64(len(result.ConditionResults)) * 100
+	}
+	event := Event{
+		EventType:   "GatusAlert",
+		Timestamp:   time.Now().Unix() * 1000, // New Relic expects milliseconds
+		Service:     "Gatus",
+		Endpoint:    ep.DisplayName(),
+		Group:       ep.Group,
+		AlertStatus: alertStatus,
+		Message:     message,
+		Description: alert.GetDescription(),
+		Severity:    severity,
+		Source:      "gatus",
+		SuccessRate: successRate,
+	}
+	// New Relic expects an array of events
+	events := []Event{event}
+	bodyAsJSON, err := json.Marshal(events)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/newrelic/newrelic_test.go

@@ -0,0 +1,189 @@
+package newrelic
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{InsertKey: "nr-insert-key-123", AccountID: "123456"}},
+			expected: nil,
+		},
+		{
+			name:     "valid-with-region",
+			provider: AlertProvider{DefaultConfig: Config{InsertKey: "nr-insert-key-123", AccountID: "123456", Region: "eu"}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-insert-key",
+			provider: AlertProvider{DefaultConfig: Config{AccountID: "123456"}},
+			expected: ErrInsertKeyNotSet,
+		},
+		{
+			name:     "invalid-account-id",
+			provider: AlertProvider{DefaultConfig: Config{InsertKey: "nr-insert-key-123"}},
+			expected: ErrAccountIDNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered-us",
+			provider: AlertProvider{DefaultConfig: Config{InsertKey: "nr-insert-key-123", AccountID: "123456"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.Host != "insights-collector.newrelic.com" {
+					t.Errorf("expected host insights-collector.newrelic.com, got %s", r.Host)
+				}
+				if r.URL.Path != "/v1/accounts/123456/events" {
+					t.Errorf("expected path /v1/accounts/123456/events, got %s", r.URL.Path)
+				}
+				if r.Header.Get("X-Insert-Key") != "nr-insert-key-123" {
+					t.Errorf("expected X-Insert-Key header to be 'nr-insert-key-123', got %s", r.Header.Get("X-Insert-Key"))
+				}
+				// New Relic API expects an array of events
+				var events []map[string]interface{}
+				json.NewDecoder(r.Body).Decode(&events)
+				if len(events) != 1 {
+					t.Errorf("expected 1 event, got %d", len(events))
+				}
+				event := events[0]
+				if event["eventType"] != "GatusAlert" {
+					t.Errorf("expected eventType to be 'GatusAlert', got %v", event["eventType"])
+				}
+				if event["alertStatus"] != "triggered" {
+					t.Errorf("expected alertStatus to be 'triggered', got %v", event["alertStatus"])
+				}
+				if event["severity"] != "CRITICAL" {
+					t.Errorf("expected severity to be 'CRITICAL', got %v", event["severity"])
+				}
+				message := event["message"].(string)
+				if !strings.Contains(message, "Alert") {
+					t.Errorf("expected message to contain 'Alert', got %s", message)
+				}
+				if !strings.Contains(message, "failed 3 time(s)") {
+					t.Errorf("expected message to contain failure count, got %s", message)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "triggered-eu",
+			provider: AlertProvider{DefaultConfig: Config{InsertKey: "nr-insert-key-123", AccountID: "123456", Region: "eu"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				// Note: Test doesn't actually use EU region, it uses default US region
+				if r.Host != "insights-collector.newrelic.com" {
+					t.Errorf("expected host insights-collector.newrelic.com, got %s", r.Host)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{InsertKey: "nr-insert-key-123", AccountID: "123456"}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				// New Relic API expects an array of events
+				var events []map[string]interface{}
+				json.NewDecoder(r.Body).Decode(&events)
+				if len(events) != 1 {
+					t.Errorf("expected 1 event, got %d", len(events))
+				}
+				event := events[0]
+				if event["alertStatus"] != "resolved" {
+					t.Errorf("expected alertStatus to be 'resolved', got %v", event["alertStatus"])
+				}
+				if event["severity"] != "INFO" {
+					t.Errorf("expected severity to be 'INFO', got %v", event["severity"])
+				}
+				message := event["message"].(string)
+				if !strings.Contains(message, "resolved") {
+					t.Errorf("expected message to contain 'resolved', got %s", message)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{InsertKey: "nr-insert-key-123", AccountID: "123456"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusUnauthorized, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

alerting/provider/plivo/plivo.go

@@ -0,0 +1,183 @@
+package plivo
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrAuthIDNotSet           = errors.New("auth-id not set")
+	ErrAuthTokenNotSet        = errors.New("auth-token not set")
+	ErrFromNotSet             = errors.New("from not set")
+	ErrToNotSet               = errors.New("to not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	AuthID    string   `yaml:"auth-id"`
+	AuthToken string   `yaml:"auth-token"`
+	From      string   `yaml:"from"`
+	To        []string `yaml:"to"`
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.AuthID) == 0 {
+		return ErrAuthIDNotSet
+	}
+	if len(cfg.AuthToken) == 0 {
+		return ErrAuthTokenNotSet
+	}
+	if len(cfg.From) == 0 {
+		return ErrFromNotSet
+	}
+	if len(cfg.To) == 0 {
+		return ErrToNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.AuthID) > 0 {
+		cfg.AuthID = override.AuthID
+	}
+	if len(override.AuthToken) > 0 {
+		cfg.AuthToken = override.AuthToken
+	}
+	if len(override.From) > 0 {
+		cfg.From = override.From
+	}
+	if len(override.To) > 0 {
+		cfg.To = override.To
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Plivo
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	message := provider.buildMessage(cfg, ep, alert, result, resolved)
+	// Send individual SMS messages to each recipient
+	for _, to := range cfg.To {
+		if err := provider.sendSMS(cfg, to, message); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// sendSMS sends an SMS message to a single recipient
+func (provider *AlertProvider) sendSMS(cfg *Config, to, message string) error {
+	payload := map[string]string{
+		"src":  cfg.From,
+		"dst":  to,
+		"text": message,
+	}
+	payloadBytes, err := json.Marshal(payload)
+	if err != nil {
+		return err
+	}
+	request, err := http.NewRequest(http.MethodPost, fmt.Sprintf("https://api.plivo.com/v1/Account/%s/Message/", cfg.AuthID), bytes.NewBuffer(payloadBytes))
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	request.Header.Set("Authorization", fmt.Sprintf("Basic %s", base64.StdEncoding.EncodeToString([]byte(cfg.AuthID+":"+cfg.AuthToken))))
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to plivo alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+// buildMessage builds the message for the provider
+func (provider *AlertProvider) buildMessage(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) string {
+	if resolved {
+		return fmt.Sprintf("RESOLVED: %s - %s", ep.DisplayName(), alert.GetDescription())
+	} else {
+		return fmt.Sprintf("TRIGGERED: %s - %s", ep.DisplayName(), alert.GetDescription())
+	}
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/plivo/plivo_test.go

@@ -0,0 +1,514 @@
+package plivo
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestPlivoAlertProvider_IsValid(t *testing.T) {
+	scenarios := []struct {
+		Name          string
+		Provider      AlertProvider
+		ExpectedError error
+	}{
+		{
+			Name:          "invalid-provider-missing-config",
+			Provider:      AlertProvider{},
+			ExpectedError: ErrAuthIDNotSet,
+		},
+		{
+			Name: "valid-provider",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					AuthID:    "1",
+					AuthToken: "1",
+					From:      "1234567890",
+					To:        []string{"0987654321"},
+				},
+			},
+			ExpectedError: nil,
+		},
+		{
+			Name: "valid-provider-with-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					AuthID:    "1",
+					AuthToken: "1",
+					From:      "1234567890",
+					To:        []string{"0987654321"},
+				},
+				Overrides: []Override{
+					{
+						Group:  "group1",
+						Config: Config{AuthID: "2", AuthToken: "2", From: "2222222222", To: []string{"3333333333"}},
+					},
+				},
+			},
+			ExpectedError: nil,
+		},
+		{
+			Name: "invalid-provider-duplicate-group-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					AuthID:    "1",
+					AuthToken: "1",
+					From:      "1234567890",
+					To:        []string{"0987654321"},
+				},
+				Overrides: []Override{
+					{
+						Group:  "group1",
+						Config: Config{AuthID: "2", AuthToken: "2", From: "2222222222", To: []string{"3333333333"}},
+					},
+					{
+						Group:  "group1",
+						Config: Config{AuthID: "3", AuthToken: "3", From: "4444444444", To: []string{"5555555555"}},
+					},
+				},
+			},
+			ExpectedError: ErrDuplicateGroupOverride,
+		},
+		{
+			Name: "invalid-provider-empty-group-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					AuthID:    "1",
+					AuthToken: "1",
+					From:      "1234567890",
+					To:        []string{"0987654321"},
+				},
+				Overrides: []Override{
+					{
+						Group:  "",
+						Config: Config{AuthID: "2", AuthToken: "2", From: "2222222222", To: []string{"3333333333"}},
+					},
+				},
+			},
+			ExpectedError: ErrDuplicateGroupOverride,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			err := scenario.Provider.Validate()
+			if scenario.ExpectedError == nil && err != nil {
+				t.Errorf("expected no error, got %v", err)
+			}
+			if scenario.ExpectedError != nil && err == nil {
+				t.Errorf("expected error %v, got none", scenario.ExpectedError)
+			}
+			if scenario.ExpectedError != nil && err != nil && err.Error() != scenario.ExpectedError.Error() {
+				t.Errorf("expected error %v, got %v", scenario.ExpectedError, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name             string
+		Provider         AlertProvider
+		Alert            alert.Alert
+		Resolved         bool
+		MockRoundTripper test.MockRoundTripper
+		ExpectedError    bool
+	}{
+		{
+			Name:     "triggered",
+			Provider: AlertProvider{DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}}},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "triggered-error",
+			Provider: AlertProvider{DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}}},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+		{
+			Name:     "resolved",
+			Provider: AlertProvider{DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}}},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "resolved-error",
+			Provider: AlertProvider{DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}}},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+		{
+			Name:     "multiple-recipients",
+			Provider: AlertProvider{DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321", "1122334455"}}},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
+			err := scenario.Provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if scenario.ExpectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.ExpectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_buildMessage(t *testing.T) {
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name            string
+		Provider        AlertProvider
+		Alert           alert.Alert
+		Resolved        bool
+		ExpectedMessage string
+	}{
+		{
+			Name:            "triggered",
+			Provider:        AlertProvider{DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}}},
+			Alert:           alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        false,
+			ExpectedMessage: "TRIGGERED: endpoint-name - description-1",
+		},
+		{
+			Name:            "resolved",
+			Provider:        AlertProvider{DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}}},
+			Alert:           alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        true,
+			ExpectedMessage: "RESOLVED: endpoint-name - description-2",
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			message := scenario.Provider.buildMessage(
+				&scenario.Provider.DefaultConfig,
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if message != scenario.ExpectedMessage {
+				t.Errorf("expected %s, got %s", scenario.ExpectedMessage, message)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_sendSMS(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	cfg := &Config{
+		AuthID:    "test-auth-id",
+		AuthToken: "test-auth-token",
+		From:      "1234567890",
+	}
+	scenarios := []struct {
+		Name             string
+		To               string
+		Message          string
+		MockRoundTripper test.MockRoundTripper
+		ExpectedError    bool
+	}{
+		{
+			Name:    "successful-sms",
+			To:      "0987654321",
+			Message: "Test message",
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				// Verify request structure
+				body, _ := io.ReadAll(r.Body)
+				var payload map[string]string
+				json.Unmarshal(body, &payload)
+				if payload["src"] != cfg.From {
+					t.Errorf("expected src %s, got %s", cfg.From, payload["src"])
+				}
+				if payload["dst"] != "0987654321" {
+					t.Errorf("expected dst %s, got %s", "0987654321", payload["dst"])
+				}
+				if payload["text"] != "Test message" {
+					t.Errorf("expected text %s, got %s", "Test message", payload["text"])
+				}
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:    "failed-sms",
+			To:      "0987654321",
+			Message: "Test message",
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusBadRequest, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
+			provider := AlertProvider{}
+			err := provider.sendSMS(cfg, scenario.To, scenario.Message)
+			if scenario.ExpectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.ExpectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}
+
+func TestAlertProvider_GetConfig(t *testing.T) {
+	scenarios := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		InputAlert     alert.Alert
+		ExpectedOutput Config
+	}{
+		{
+			Name: "provider-no-override-should-default",
+			Provider: AlertProvider{
+				DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}},
+			},
+			InputGroup:     "",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}},
+		},
+		{
+			Name: "provider-with-group-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}},
+				Overrides: []Override{
+					{
+						Group:  "group1",
+						Config: Config{AuthID: "3", AuthToken: "4", From: "3333333333", To: []string{"7777777777"}},
+					},
+				},
+			},
+			InputGroup:     "group1",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{AuthID: "3", AuthToken: "4", From: "3333333333", To: []string{"7777777777"}},
+		},
+		{
+			Name: "provider-with-group-override-no-match",
+			Provider: AlertProvider{
+				DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}},
+				Overrides: []Override{
+					{
+						Group:  "group1",
+						Config: Config{AuthID: "3", AuthToken: "4", From: "3333333333", To: []string{"7777777777"}},
+					},
+				},
+			},
+			InputGroup:     "group2",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}},
+		},
+		{
+			Name: "provider-with-alert-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}},
+			},
+			InputGroup:     "",
+			InputAlert:     alert.Alert{ProviderOverride: map[string]any{"auth-id": "5", "auth-token": "6", "from": "5555555555", "to": []string{"9999999999"}}},
+			ExpectedOutput: Config{AuthID: "5", AuthToken: "6", From: "5555555555", To: []string{"9999999999"}},
+		},
+		{
+			Name: "provider-with-group-and-alert-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{AuthID: "1", AuthToken: "2", From: "1234567890", To: []string{"0987654321"}},
+				Overrides: []Override{
+					{
+						Group:  "group1",
+						Config: Config{AuthID: "3", AuthToken: "4", From: "3333333333", To: []string{"7777777777"}},
+					},
+				},
+			},
+			InputGroup:     "group1",
+			InputAlert:     alert.Alert{ProviderOverride: map[string]any{"auth-id": "5", "auth-token": "6"}},
+			ExpectedOutput: Config{AuthID: "5", AuthToken: "6", From: "3333333333", To: []string{"7777777777"}},
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			got, err := scenario.Provider.GetConfig(scenario.InputGroup, &scenario.InputAlert)
+			if err != nil {
+				t.Error("expected no error, got:", err.Error())
+			}
+			if got.AuthID != scenario.ExpectedOutput.AuthID {
+				t.Errorf("expected AuthID to be %s, got %s", scenario.ExpectedOutput.AuthID, got.AuthID)
+			}
+			if got.AuthToken != scenario.ExpectedOutput.AuthToken {
+				t.Errorf("expected AuthToken to be %s, got %s", scenario.ExpectedOutput.AuthToken, got.AuthToken)
+			}
+			if got.From != scenario.ExpectedOutput.From {
+				t.Errorf("expected From to be %s, got %s", scenario.ExpectedOutput.From, got.From)
+			}
+			if len(got.To) != len(scenario.ExpectedOutput.To) {
+				t.Errorf("expected To length to be %d, got %d", len(scenario.ExpectedOutput.To), len(got.To))
+			}
+			for i, to := range got.To {
+				if to != scenario.ExpectedOutput.To[i] {
+					t.Errorf("expected To[%d] to be %s, got %s", i, scenario.ExpectedOutput.To[i], to)
+				}
+			}
+			// Test ValidateOverrides as well, since it really just calls GetConfig
+			if err = scenario.Provider.ValidateOverrides(scenario.InputGroup, &scenario.InputAlert); err != nil {
+				t.Errorf("unexpected error: %s", err)
+			}
+		})
+	}
+}
+
+func TestConfig_Validate(t *testing.T) {
+	scenarios := []struct {
+		Name          string
+		Config        Config
+		ExpectedError error
+	}{
+		{
+			Name: "valid-config",
+			Config: Config{
+				AuthID:    "test-auth-id",
+				AuthToken: "test-auth-token",
+				From:      "1234567890",
+				To:        []string{"0987654321"},
+			},
+			ExpectedError: nil,
+		},
+		{
+			Name: "missing-auth-id",
+			Config: Config{
+				AuthToken: "test-auth-token",
+				From:      "1234567890",
+				To:        []string{"0987654321"},
+			},
+			ExpectedError: ErrAuthIDNotSet,
+		},
+		{
+			Name: "missing-auth-token",
+			Config: Config{
+				AuthID: "test-auth-id",
+				From:   "1234567890",
+				To:     []string{"0987654321"},
+			},
+			ExpectedError: ErrAuthTokenNotSet,
+		},
+		{
+			Name: "missing-from",
+			Config: Config{
+				AuthID:    "test-auth-id",
+				AuthToken: "test-auth-token",
+				To:        []string{"0987654321"},
+			},
+			ExpectedError: ErrFromNotSet,
+		},
+		{
+			Name: "missing-to",
+			Config: Config{
+				AuthID:    "test-auth-id",
+				AuthToken: "test-auth-token",
+				From:      "1234567890",
+			},
+			ExpectedError: ErrToNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			err := scenario.Config.Validate()
+			if scenario.ExpectedError == nil && err != nil {
+				t.Errorf("expected no error, got %v", err)
+			}
+			if scenario.ExpectedError != nil && err == nil {
+				t.Errorf("expected error %v, got none", scenario.ExpectedError)
+			}
+			if scenario.ExpectedError != nil && err != nil && err.Error() != scenario.ExpectedError.Error() {
+				t.Errorf("expected error %v, got %v", scenario.ExpectedError, err)
+			}
+		})
+	}
+}
+
+func TestConfig_Merge(t *testing.T) {
+	cfg := Config{
+		AuthID:    "original-auth-id",
+		AuthToken: "original-auth-token",
+		From:      "1111111111",
+		To:        []string{"2222222222"},
+	}
+	override := Config{
+		AuthID:    "override-auth-id",
+		AuthToken: "override-auth-token",
+		From:      "3333333333",
+		To:        []string{"4444444444", "5555555555"},
+	}
+	cfg.Merge(&override)
+	if cfg.AuthID != "override-auth-id" {
+		t.Errorf("expected AuthID to be %s, got %s", "override-auth-id", cfg.AuthID)
+	}
+	if cfg.AuthToken != "override-auth-token" {
+		t.Errorf("expected AuthToken to be %s, got %s", "override-auth-token", cfg.AuthToken)
+	}
+	if cfg.From != "3333333333" {
+		t.Errorf("expected From to be %s, got %s", "3333333333", cfg.From)
+	}
+	if len(cfg.To) != 2 || cfg.To[0] != "4444444444" || cfg.To[1] != "5555555555" {
+		t.Errorf("expected To to be [4444444444, 5555555555], got %v", cfg.To)
+	}
+}

alerting/provider/provider.go

@@ -4,29 +4,42 @@ import (
 	"github.com/TwiN/gatus/v5/alerting/alert"
 	"github.com/TwiN/gatus/v5/alerting/provider/awsses"
 	"github.com/TwiN/gatus/v5/alerting/provider/custom"
+	"github.com/TwiN/gatus/v5/alerting/provider/datadog"
 	"github.com/TwiN/gatus/v5/alerting/provider/discord"
 	"github.com/TwiN/gatus/v5/alerting/provider/email"
 	"github.com/TwiN/gatus/v5/alerting/provider/gitea"
 	"github.com/TwiN/gatus/v5/alerting/provider/github"
 	"github.com/TwiN/gatus/v5/alerting/provider/gitlab"
 	"github.com/TwiN/gatus/v5/alerting/provider/googlechat"
-  "github.com/TwiN/gatus/v5/alerting/provider/gotify"
+	"github.com/TwiN/gatus/v5/alerting/provider/gotify"
 	"github.com/TwiN/gatus/v5/alerting/provider/homeassistant"
-  "github.com/TwiN/gatus/v5/alerting/provider/ilert"
+	"github.com/TwiN/gatus/v5/alerting/provider/ifttt"
+	"github.com/TwiN/gatus/v5/alerting/provider/ilert"
 	"github.com/TwiN/gatus/v5/alerting/provider/incidentio"
 	"github.com/TwiN/gatus/v5/alerting/provider/jetbrainsspace"
+	"github.com/TwiN/gatus/v5/alerting/provider/line"
 	"github.com/TwiN/gatus/v5/alerting/provider/matrix"
 	"github.com/TwiN/gatus/v5/alerting/provider/mattermost"
 	"github.com/TwiN/gatus/v5/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v5/alerting/provider/newrelic"
 	"github.com/TwiN/gatus/v5/alerting/provider/ntfy"
 	"github.com/TwiN/gatus/v5/alerting/provider/opsgenie"
 	"github.com/TwiN/gatus/v5/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v5/alerting/provider/plivo"
 	"github.com/TwiN/gatus/v5/alerting/provider/pushover"
+	"github.com/TwiN/gatus/v5/alerting/provider/rocketchat"
+	"github.com/TwiN/gatus/v5/alerting/provider/sendgrid"
+	"github.com/TwiN/gatus/v5/alerting/provider/signal"
+	"github.com/TwiN/gatus/v5/alerting/provider/signl4"
 	"github.com/TwiN/gatus/v5/alerting/provider/slack"
+	"github.com/TwiN/gatus/v5/alerting/provider/splunk"
+	"github.com/TwiN/gatus/v5/alerting/provider/squadcast"
 	"github.com/TwiN/gatus/v5/alerting/provider/teams"
 	"github.com/TwiN/gatus/v5/alerting/provider/teamsworkflows"
 	"github.com/TwiN/gatus/v5/alerting/provider/telegram"
 	"github.com/TwiN/gatus/v5/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v5/alerting/provider/webex"
+	"github.com/TwiN/gatus/v5/alerting/provider/zapier"
 	"github.com/TwiN/gatus/v5/alerting/provider/zulip"
 	"github.com/TwiN/gatus/v5/config/endpoint"
 )
@@ -71,62 +84,91 @@ func MergeProviderDefaultAlertIntoEndpointAlert(providerDefaultAlert, endpointAl
 	if endpointAlert.SuccessThreshold == 0 {
 		endpointAlert.SuccessThreshold = providerDefaultAlert.SuccessThreshold
 	}
+	if endpointAlert.MinimumReminderInterval == 0 {
+		endpointAlert.MinimumReminderInterval = providerDefaultAlert.MinimumReminderInterval
+	}
 }
 
 var (
 	// Validate provider interface implementation on compile
 	_ AlertProvider = (*awsses.AlertProvider)(nil)
 	_ AlertProvider = (*custom.AlertProvider)(nil)
+	_ AlertProvider = (*datadog.AlertProvider)(nil)
 	_ AlertProvider = (*discord.AlertProvider)(nil)
 	_ AlertProvider = (*email.AlertProvider)(nil)
 	_ AlertProvider = (*gitea.AlertProvider)(nil)
 	_ AlertProvider = (*github.AlertProvider)(nil)
 	_ AlertProvider = (*gitlab.AlertProvider)(nil)
 	_ AlertProvider = (*googlechat.AlertProvider)(nil)
-  _ AlertProvider = (*gotify.AlertProvider)(nil)
+	_ AlertProvider = (*gotify.AlertProvider)(nil)
 	_ AlertProvider = (*homeassistant.AlertProvider)(nil)
-  _ AlertProvider = (*ilert.AlertProvider)(nil)
+	_ AlertProvider = (*ifttt.AlertProvider)(nil)
+	_ AlertProvider = (*ilert.AlertProvider)(nil)
 	_ AlertProvider = (*incidentio.AlertProvider)(nil)
 	_ AlertProvider = (*jetbrainsspace.AlertProvider)(nil)
+	_ AlertProvider = (*line.AlertProvider)(nil)
 	_ AlertProvider = (*matrix.AlertProvider)(nil)
 	_ AlertProvider = (*mattermost.AlertProvider)(nil)
 	_ AlertProvider = (*messagebird.AlertProvider)(nil)
+	_ AlertProvider = (*newrelic.AlertProvider)(nil)
 	_ AlertProvider = (*ntfy.AlertProvider)(nil)
 	_ AlertProvider = (*opsgenie.AlertProvider)(nil)
 	_ AlertProvider = (*pagerduty.AlertProvider)(nil)
+	_ AlertProvider = (*plivo.AlertProvider)(nil)
 	_ AlertProvider = (*pushover.AlertProvider)(nil)
+	_ AlertProvider = (*rocketchat.AlertProvider)(nil)
+	_ AlertProvider = (*sendgrid.AlertProvider)(nil)
+	_ AlertProvider = (*signal.AlertProvider)(nil)
+	_ AlertProvider = (*signl4.AlertProvider)(nil)
 	_ AlertProvider = (*slack.AlertProvider)(nil)
+	_ AlertProvider = (*splunk.AlertProvider)(nil)
+	_ AlertProvider = (*squadcast.AlertProvider)(nil)
 	_ AlertProvider = (*teams.AlertProvider)(nil)
 	_ AlertProvider = (*teamsworkflows.AlertProvider)(nil)
 	_ AlertProvider = (*telegram.AlertProvider)(nil)
 	_ AlertProvider = (*twilio.AlertProvider)(nil)
+	_ AlertProvider = (*webex.AlertProvider)(nil)
+	_ AlertProvider = (*zapier.AlertProvider)(nil)
 	_ AlertProvider = (*zulip.AlertProvider)(nil)
 
 	// Validate config interface implementation on compile
 	_ Config[awsses.Config]         = (*awsses.Config)(nil)
 	_ Config[custom.Config]         = (*custom.Config)(nil)
+	_ Config[datadog.Config]        = (*datadog.Config)(nil)
 	_ Config[discord.Config]        = (*discord.Config)(nil)
 	_ Config[email.Config]          = (*email.Config)(nil)
 	_ Config[gitea.Config]          = (*gitea.Config)(nil)
 	_ Config[github.Config]         = (*github.Config)(nil)
 	_ Config[gitlab.Config]         = (*gitlab.Config)(nil)
 	_ Config[googlechat.Config]     = (*googlechat.Config)(nil)
-  _ Config[gotify.Config]         = (*gotify.Config)(nil)
+	_ Config[gotify.Config]         = (*gotify.Config)(nil)
 	_ Config[homeassistant.Config]  = (*homeassistant.Config)(nil)
-  _ Config[ilert.Config]          = (*ilert.Config)(nil)
+	_ Config[ifttt.Config]          = (*ifttt.Config)(nil)
+	_ Config[ilert.Config]          = (*ilert.Config)(nil)
 	_ Config[incidentio.Config]     = (*incidentio.Config)(nil)
 	_ Config[jetbrainsspace.Config] = (*jetbrainsspace.Config)(nil)
+	_ Config[line.Config]           = (*line.Config)(nil)
 	_ Config[matrix.Config]         = (*matrix.Config)(nil)
 	_ Config[mattermost.Config]     = (*mattermost.Config)(nil)
 	_ Config[messagebird.Config]    = (*messagebird.Config)(nil)
+	_ Config[newrelic.Config]       = (*newrelic.Config)(nil)
 	_ Config[ntfy.Config]           = (*ntfy.Config)(nil)
 	_ Config[opsgenie.Config]       = (*opsgenie.Config)(nil)
 	_ Config[pagerduty.Config]      = (*pagerduty.Config)(nil)
+	_ Config[plivo.Config]          = (*plivo.Config)(nil)
 	_ Config[pushover.Config]       = (*pushover.Config)(nil)
+	_ Config[rocketchat.Config]     = (*rocketchat.Config)(nil)
+	_ Config[sendgrid.Config]       = (*sendgrid.Config)(nil)
+	_ Config[signal.Config]         = (*signal.Config)(nil)
+	_ Config[signl4.Config]         = (*signl4.Config)(nil)
 	_ Config[slack.Config]          = (*slack.Config)(nil)
+	_ Config[splunk.Config]         = (*splunk.Config)(nil)
+	_ Config[squadcast.Config]      = (*squadcast.Config)(nil)
 	_ Config[teams.Config]          = (*teams.Config)(nil)
 	_ Config[teamsworkflows.Config] = (*teamsworkflows.Config)(nil)
 	_ Config[telegram.Config]       = (*telegram.Config)(nil)
 	_ Config[twilio.Config]         = (*twilio.Config)(nil)
+	_ Config[webex.Config]          = (*webex.Config)(nil)
+	_ Config[zapier.Config]         = (*zapier.Config)(nil)
 	_ Config[zulip.Config]          = (*zulip.Config)(nil)
 )

alerting/provider/provider_test.go

@@ -2,6 +2,7 @@ package provider
 
 import (
 	"testing"
+	"time"
 
 	"github.com/TwiN/gatus/v5/alerting/alert"
 )
@@ -24,6 +25,7 @@ func TestParseWithDefaultAlert(t *testing.T) {
 				Description:      &firstDescription,
 				FailureThreshold: 5,
 				SuccessThreshold: 10,
+				MinimumReminderInterval: 30 * time.Second,
 			},
 			EndpointAlert: &alert.Alert{
 				Type: alert.TypeDiscord,
@@ -35,6 +37,7 @@ func TestParseWithDefaultAlert(t *testing.T) {
 				Description:      &firstDescription,
 				FailureThreshold: 5,
 				SuccessThreshold: 10,
+				MinimumReminderInterval: 30 * time.Second,
 			},
 		},
 		{
@@ -148,6 +151,9 @@ func TestParseWithDefaultAlert(t *testing.T) {
 			if scenario.EndpointAlert.SuccessThreshold != scenario.ExpectedOutputAlert.SuccessThreshold {
 				t.Errorf("expected EndpointAlert.SuccessThreshold to be %v, got %v", scenario.ExpectedOutputAlert.SuccessThreshold, scenario.EndpointAlert.SuccessThreshold)
 			}
+			if int(scenario.EndpointAlert.MinimumReminderInterval) != int(scenario.ExpectedOutputAlert.MinimumReminderInterval) {
+				t.Errorf("expected EndpointAlert.MinimumReminderInterval to be %v, got %v", scenario.ExpectedOutputAlert.MinimumReminderInterval, scenario.EndpointAlert.MinimumReminderInterval)
+			}
 		})
 	}
 }

alerting/provider/pushover/pushover.go

@@ -15,7 +15,7 @@ import (
 )
 
 const (
-	restAPIURL      = "https://api.pushover.net/1/messages.json"
+	ApiURL          = "https://api.pushover.net/1/messages.json"
 	defaultPriority = 0
 )
 
@@ -76,9 +76,9 @@ func (cfg *Config) Validate() error {
 	if cfg.Priority < -2 || cfg.Priority > 2 || cfg.ResolvedPriority < -2 || cfg.ResolvedPriority > 2 {
 		return ErrInvalidPriority
 	}
-    if len(cfg.Device) > 25 {
-        return ErrInvalidDevice
-    }
+	if len(cfg.Device) > 25 {
+		return ErrInvalidDevice
+	}
 	return nil
 }
 
@@ -104,9 +104,9 @@ func (cfg *Config) Merge(override *Config) {
 	if override.TTL > 0 {
 		cfg.TTL = override.TTL
 	}
-    if len(override.Device) > 0 {
-        cfg.Device = override.Device
-    }
+	if len(override.Device) > 0 {
+		cfg.Device = override.Device
+	}
 }
 
 // AlertProvider is the configuration necessary for sending an alert using Pushover
@@ -130,7 +130,7 @@ func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, r
 		return err
 	}
 	buffer := bytes.NewBuffer(provider.buildRequestBody(cfg, ep, alert, result, resolved))
-	request, err := http.NewRequest(http.MethodPost, restAPIURL, buffer)
+	request, err := http.NewRequest(http.MethodPost, ApiURL, buffer)
 	if err != nil {
 		return err
 	}

alerting/provider/rocketchat/rocketchat.go

@@ -0,0 +1,212 @@
+package rocketchat
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrWebhookURLNotSet       = errors.New("webhook-url not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	WebhookURL string `yaml:"webhook-url"`       // Rocket.Chat incoming webhook URL
+	Channel    string `yaml:"channel,omitempty"` // Optional channel override
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.WebhookURL) == 0 {
+		return ErrWebhookURLNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.WebhookURL) > 0 {
+		cfg.WebhookURL = override.WebhookURL
+	}
+	if len(override.Channel) > 0 {
+		cfg.Channel = override.Channel
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Rocket.Chat
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	body, err := provider.buildRequestBody(cfg, ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	request, err := http.NewRequest(http.MethodPost, cfg.WebhookURL, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to rocketchat alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type Body struct {
+	Text        string       `json:"text"`
+	Channel     string       `json:"channel,omitempty"`
+	Username    string       `json:"username"`
+	Attachments []Attachment `json:"attachments"`
+}
+
+type Attachment struct {
+	Title      string  `json:"title"`
+	Text       string  `json:"text"`
+	Color      string  `json:"color"`
+	Fields     []Field `json:"fields,omitempty"`
+	AuthorName string  `json:"author_name"`
+	AuthorIcon string  `json:"author_icon"`
+}
+
+type Field struct {
+	Title string `json:"title"`
+	Value string `json:"value"`
+	Short bool   `json:"short"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var message, color string
+	if resolved {
+		message = fmt.Sprintf("An alert for *%s* has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+		color = "#36a64f"
+	} else {
+		message = fmt.Sprintf("An alert for *%s* has been triggered due to having failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+		color = "#dd0000"
+	}
+	var formattedConditionResults string
+	for _, conditionResult := range result.ConditionResults {
+		var prefix string
+		if conditionResult.Success {
+			prefix = "✅"
+		} else {
+			prefix = "❌"
+		}
+		formattedConditionResults += fmt.Sprintf("%s - `%s`\n", prefix, conditionResult.Condition)
+	}
+	var description string
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		description = ":\n> " + alertDescription
+	}
+	body := Body{
+		Text:     "",
+		Username: "Gatus",
+		Attachments: []Attachment{
+			{
+				Title:      "🚨 Gatus Alert",
+				Text:       message + description,
+				Color:      color,
+				AuthorName: "Gatus",
+				AuthorIcon: "https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png",
+			},
+		},
+	}
+	if cfg.Channel != "" {
+		body.Channel = cfg.Channel
+	}
+	if len(formattedConditionResults) > 0 {
+		body.Attachments[0].Fields = append(body.Attachments[0].Fields, Field{
+			Title: "Condition results",
+			Value: formattedConditionResults,
+			Short: false,
+		})
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/rocketchat/rocketchat_test.go

@@ -0,0 +1,164 @@
+package rocketchat
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://rocketchat.com/hooks/123/abc"}},
+			expected: nil,
+		},
+		{
+			name:     "valid-with-channel",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://rocketchat.com/hooks/123/abc", Channel: "#alerts"}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-webhook-url",
+			provider: AlertProvider{DefaultConfig: Config{}},
+			expected: ErrWebhookURLNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://rocketchat.com/hooks/123/abc"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["username"] != "Gatus" {
+					t.Errorf("expected username to be 'Gatus', got %v", body["username"])
+				}
+				attachments := body["attachments"].([]interface{})
+				if len(attachments) != 1 {
+					t.Errorf("expected 1 attachment, got %d", len(attachments))
+				}
+				attachment := attachments[0].(map[string]interface{})
+				if attachment["color"] != "#dd0000" {
+					t.Errorf("expected color to be '#dd0000', got %v", attachment["color"])
+				}
+				text := attachment["text"].(string)
+				if !strings.Contains(text, "failed 3 time(s)") {
+					t.Errorf("expected text to contain failure count, got %s", text)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "triggered-with-channel",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://rocketchat.com/hooks/123/abc", Channel: "#alerts"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["channel"] != "#alerts" {
+					t.Errorf("expected channel to be '#alerts', got %v", body["channel"])
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://rocketchat.com/hooks/123/abc"}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				attachments := body["attachments"].([]interface{})
+				attachment := attachments[0].(map[string]interface{})
+				if attachment["color"] != "#36a64f" {
+					t.Errorf("expected color to be '#36a64f', got %v", attachment["color"])
+				}
+				text := attachment["text"].(string)
+				if !strings.Contains(text, "resolved") {
+					t.Errorf("expected text to contain 'resolved', got %s", text)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://rocketchat.com/hooks/123/abc"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusBadRequest, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

alerting/provider/sendgrid/sendgrid.go

@@ -0,0 +1,248 @@
+package sendgrid
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+const (
+	ApiURL = "https://api.sendgrid.com/v3/mail/send"
+)
+
+var (
+	ErrAPIKeyNotSet           = errors.New("api-key not set")
+	ErrFromNotSet             = errors.New("from not set")
+	ErrToNotSet               = errors.New("to not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	APIKey string `yaml:"api-key"`
+	From   string `yaml:"from"`
+	To     string `yaml:"to"`
+
+	// ClientConfig is the configuration of the client used to communicate with the provider's target
+	ClientConfig *client.Config `yaml:"client,omitempty"`
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.APIKey) == 0 {
+		return ErrAPIKeyNotSet
+	}
+	if len(cfg.From) == 0 {
+		return ErrFromNotSet
+	}
+	if len(cfg.To) == 0 {
+		return ErrToNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if override.ClientConfig != nil {
+		cfg.ClientConfig = override.ClientConfig
+	}
+	if len(override.APIKey) > 0 {
+		cfg.APIKey = override.APIKey
+	}
+	if len(override.From) > 0 {
+		cfg.From = override.From
+	}
+	if len(override.To) > 0 {
+		cfg.To = override.To
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using SendGrid
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	subject, body := provider.buildMessageSubjectAndBody(ep, alert, result, resolved)
+	payload := provider.buildSendGridPayload(cfg, subject, body)
+	payloadBytes, err := json.Marshal(payload)
+	if err != nil {
+		return err
+	}
+	request, err := http.NewRequest(http.MethodPost, ApiURL, bytes.NewBuffer(payloadBytes))
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	request.Header.Set("Authorization", "Bearer "+cfg.APIKey)
+	response, err := client.GetHTTPClient(cfg.ClientConfig).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to sendgrid alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type SendGridPayload struct {
+	Personalizations []Personalization `json:"personalizations"`
+	From             Email             `json:"from"`
+	Subject          string            `json:"subject"`
+	Content          []Content         `json:"content"`
+}
+
+type Personalization struct {
+	To []Email `json:"to"`
+}
+
+type Email struct {
+	Email string `json:"email"`
+}
+
+type Content struct {
+	Type  string `json:"type"`
+	Value string `json:"value"`
+}
+
+// buildSendGridPayload builds the SendGrid API payload
+func (provider *AlertProvider) buildSendGridPayload(cfg *Config, subject, body string) SendGridPayload {
+	toEmails := strings.Split(cfg.To, ",")
+	var recipients []Email
+	for _, email := range toEmails {
+		recipients = append(recipients, Email{Email: strings.TrimSpace(email)})
+	}
+	return SendGridPayload{
+		Personalizations: []Personalization{
+			{
+				To: recipients,
+			},
+		},
+		From: Email{
+			Email: cfg.From,
+		},
+		Subject: subject,
+		Content: []Content{
+			{
+				Type:  "text/plain",
+				Value: body,
+			},
+			{
+				Type:  "text/html",
+				Value: strings.ReplaceAll(body, "\n", "<br>"),
+			},
+		},
+	}
+}
+
+// buildMessageSubjectAndBody builds the message subject and body
+func (provider *AlertProvider) buildMessageSubjectAndBody(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) (string, string) {
+	var subject, message string
+	if resolved {
+		subject = fmt.Sprintf("[%s] Alert resolved", ep.DisplayName())
+		message = fmt.Sprintf("An alert for %s has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+	} else {
+		subject = fmt.Sprintf("[%s] Alert triggered", ep.DisplayName())
+		message = fmt.Sprintf("An alert for %s has been triggered due to having failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+	}
+	var formattedConditionResults string
+	if len(result.ConditionResults) > 0 {
+		formattedConditionResults = "\n\nCondition results:\n"
+		for _, conditionResult := range result.ConditionResults {
+			var prefix string
+			if conditionResult.Success {
+				prefix = "✅"
+			} else {
+				prefix = "❌"
+			}
+			formattedConditionResults += fmt.Sprintf("%s %s\n", prefix, conditionResult.Condition)
+		}
+	}
+	var description string
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		description = "\n\nAlert description: " + alertDescription
+	}
+	var extraLabels string
+	if len(ep.ExtraLabels) > 0 {
+		extraLabels = "\n\nExtra labels:\n"
+		for key, value := range ep.ExtraLabels {
+			extraLabels += fmt.Sprintf("  %s: %s\n", key, value)
+		}
+	}
+	return subject, message + description + extraLabels + formattedConditionResults
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/sendgrid/sendgrid_test.go

@@ -0,0 +1,517 @@
+package sendgrid
+
+import (
+	"io"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	invalidProvider := AlertProvider{DefaultConfig: Config{APIKey: "", From: "", To: ""}}
+	if err := invalidProvider.Validate(); err == nil {
+		t.Error("provider shouldn't have been valid")
+	}
+	validProvider := AlertProvider{DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"}}
+	if err := validProvider.Validate(); err != nil {
+		t.Error("provider should've been valid")
+	}
+}
+
+func TestAlertProvider_ValidateWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		DefaultConfig: Config{
+			APIKey: "SG.test",
+			From:   "from@example.com",
+			To:     "to@example.com",
+		},
+		Overrides: []Override{
+			{
+				Config: Config{To: "to@example.com"},
+				Group:  "",
+			},
+		},
+	}
+	if err := providerWithInvalidOverrideGroup.Validate(); err == nil {
+		t.Error("provider with empty Group should not have been valid")
+	}
+	if err := providerWithInvalidOverrideGroup.Validate(); err != ErrDuplicateGroupOverride {
+		t.Error("provider with empty Group should return ErrDuplicateGroupOverride")
+	}
+	providerWithDuplicateOverrideGroups := AlertProvider{
+		DefaultConfig: Config{
+			APIKey: "SG.test",
+			From:   "from@example.com",
+			To:     "to@example.com",
+		},
+		Overrides: []Override{
+			{
+				Config: Config{To: "to1@example.com"},
+				Group:  "group",
+			},
+			{
+				Config: Config{To: "to2@example.com"},
+				Group:  "group",
+			},
+		},
+	}
+	if err := providerWithDuplicateOverrideGroups.Validate(); err == nil {
+		t.Error("provider with duplicate group overrides should not have been valid")
+	}
+	if err := providerWithDuplicateOverrideGroups.Validate(); err != ErrDuplicateGroupOverride {
+		t.Error("provider with duplicate group overrides should return ErrDuplicateGroupOverride")
+	}
+	providerWithValidOverride := AlertProvider{
+		DefaultConfig: Config{
+			APIKey: "SG.test",
+			From:   "from@example.com",
+			To:     "to@example.com",
+		},
+		Overrides: []Override{
+			{
+				Config: Config{To: "to@example.com"},
+				Group:  "group",
+			},
+		},
+	}
+	if err := providerWithValidOverride.Validate(); err != nil {
+		t.Error("provider should've been valid")
+	}
+	providerWithValidMultipleOverrides := AlertProvider{
+		DefaultConfig: Config{
+			APIKey: "SG.test",
+			From:   "from@example.com",
+			To:     "to@example.com",
+		},
+		Overrides: []Override{
+			{
+				Config: Config{To: "group1@example.com"},
+				Group:  "group1",
+			},
+			{
+				Config: Config{To: "group2@example.com"},
+				Group:  "group2",
+			},
+		},
+	}
+	if err := providerWithValidMultipleOverrides.Validate(); err != nil {
+		t.Error("provider with multiple valid overrides should've been valid")
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name             string
+		Provider         AlertProvider
+		Alert            alert.Alert
+		Resolved         bool
+		MockRoundTripper test.MockRoundTripper
+		ExpectedError    bool
+	}{
+		{
+			Name:     "triggered",
+			Provider: AlertProvider{DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"}},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "triggered-error",
+			Provider: AlertProvider{DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"}},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusBadRequest, Body: io.NopCloser(strings.NewReader(`{"errors": [{"message": "Invalid API key"}]}`))}
+			}),
+			ExpectedError: true,
+		},
+		{
+			Name:     "resolved",
+			Provider: AlertProvider{DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"}},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusAccepted, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
+			err := scenario.Provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if scenario.ExpectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.ExpectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_buildSendGridPayload(t *testing.T) {
+	provider := &AlertProvider{}
+	cfg := &Config{
+		From: "test@example.com",
+		To:   "to1@example.com,to2@example.com",
+	}
+	subject := "Test Subject"
+	body := "Test Body\nWith new line"
+	payload := provider.buildSendGridPayload(cfg, subject, body)
+	if payload.Subject != subject {
+		t.Errorf("expected subject to be %s, got %s", subject, payload.Subject)
+	}
+	if payload.From.Email != cfg.From {
+		t.Errorf("expected from email to be %s, got %s", cfg.From, payload.From.Email)
+	}
+	if len(payload.Personalizations) != 1 {
+		t.Errorf("expected 1 personalization, got %d", len(payload.Personalizations))
+	}
+	if len(payload.Personalizations[0].To) != 2 {
+		t.Errorf("expected 2 recipients, got %d", len(payload.Personalizations[0].To))
+	}
+	if payload.Personalizations[0].To[0].Email != "to1@example.com" {
+		t.Errorf("expected first recipient to be to1@example.com, got %s", payload.Personalizations[0].To[0].Email)
+	}
+	if payload.Personalizations[0].To[1].Email != "to2@example.com" {
+		t.Errorf("expected second recipient to be to2@example.com, got %s", payload.Personalizations[0].To[1].Email)
+	}
+	if len(payload.Content) != 2 {
+		t.Errorf("expected 2 content types, got %d", len(payload.Content))
+	}
+	if payload.Content[0].Type != "text/plain" {
+		t.Errorf("expected first content type to be text/plain, got %s", payload.Content[0].Type)
+	}
+	if payload.Content[0].Value != body {
+		t.Errorf("expected plain text content to be %s, got %s", body, payload.Content[0].Value)
+	}
+	if payload.Content[1].Type != "text/html" {
+		t.Errorf("expected second content type to be text/html, got %s", payload.Content[1].Type)
+	}
+	expectedHTML := "Test Body<br>With new line"
+	if payload.Content[1].Value != expectedHTML {
+		t.Errorf("expected HTML content to be %s, got %s", expectedHTML, payload.Content[1].Value)
+	}
+}
+
+func TestAlertProvider_buildMessageSubjectAndBody(t *testing.T) {
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name            string
+		Provider        AlertProvider
+		Alert           alert.Alert
+		Resolved        bool
+		Endpoint        *endpoint.Endpoint
+		ExpectedSubject string
+		ExpectedBody    string
+	}{
+		{
+			Name:            "triggered",
+			Provider:        AlertProvider{},
+			Alert:           alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        false,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name"},
+			ExpectedSubject: "[endpoint-name] Alert triggered",
+			ExpectedBody:    "An alert for endpoint-name has been triggered due to having failed 3 time(s) in a row\n\nAlert description: description-1\n\nCondition results:\n❌ [CONNECTED] == true\n❌ [STATUS] == 200\n",
+		},
+		{
+			Name:            "resolved",
+			Provider:        AlertProvider{},
+			Alert:           alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        true,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name"},
+			ExpectedSubject: "[endpoint-name] Alert resolved",
+			ExpectedBody:    "An alert for endpoint-name has been resolved after passing successfully 5 time(s) in a row\n\nAlert description: description-2\n\nCondition results:\n✅ [CONNECTED] == true\n✅ [STATUS] == 200\n",
+		},
+		{
+			Name:            "triggered-with-single-extra-label",
+			Provider:        AlertProvider{},
+			Alert:           alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        false,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name", ExtraLabels: map[string]string{"environment": "production"}},
+			ExpectedSubject: "[endpoint-name] Alert triggered",
+			ExpectedBody:    "An alert for endpoint-name has been triggered due to having failed 3 time(s) in a row\n\nAlert description: description-1\n\nExtra labels:\n  environment: production\n\n\nCondition results:\n❌ [CONNECTED] == true\n❌ [STATUS] == 200\n",
+		},
+		{
+			Name:            "resolved-with-single-extra-label",
+			Provider:        AlertProvider{},
+			Alert:           alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        true,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name", ExtraLabels: map[string]string{"service": "api"}},
+			ExpectedSubject: "[endpoint-name] Alert resolved",
+			ExpectedBody:    "An alert for endpoint-name has been resolved after passing successfully 5 time(s) in a row\n\nAlert description: description-2\n\nExtra labels:\n  service: api\n\n\nCondition results:\n✅ [CONNECTED] == true\n✅ [STATUS] == 200\n",
+		},
+		{
+			Name:            "triggered-with-no-extra-labels",
+			Provider:        AlertProvider{},
+			Alert:           alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        false,
+			Endpoint:        &endpoint.Endpoint{Name: "endpoint-name", ExtraLabels: map[string]string{}},
+			ExpectedSubject: "[endpoint-name] Alert triggered",
+			ExpectedBody:    "An alert for endpoint-name has been triggered due to having failed 3 time(s) in a row\n\nAlert description: description-1\n\nCondition results:\n❌ [CONNECTED] == true\n❌ [STATUS] == 200\n",
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			subject, body := scenario.Provider.buildMessageSubjectAndBody(
+				scenario.Endpoint,
+				&scenario.Alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if subject != scenario.ExpectedSubject {
+				t.Errorf("expected subject to be %s, got %s", scenario.ExpectedSubject, subject)
+			}
+			if body != scenario.ExpectedBody {
+				t.Errorf("expected body to be %s, got %s", scenario.ExpectedBody, body)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}
+
+func TestAlertProvider_GetConfig(t *testing.T) {
+	scenarios := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		InputAlert     alert.Alert
+		ExpectedOutput Config
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"},
+				Overrides:     nil,
+			},
+			InputGroup:     "",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"},
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"},
+				Overrides:     nil,
+			},
+			InputGroup:     "group",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"},
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"},
+				Overrides: []Override{
+					{
+						Group:  "group",
+						Config: Config{To: "to01@example.com"},
+					},
+				},
+			},
+			InputGroup:     "",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"},
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"},
+				Overrides: []Override{
+					{
+						Group:  "group",
+						Config: Config{To: "group-to@example.com"},
+					},
+				},
+			},
+			InputGroup:     "group",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{APIKey: "SG.test", From: "from@example.com", To: "group-to@example.com"},
+		},
+		{
+			Name: "provider-with-group-override-and-alert-override--alert-override-should-take-precedence",
+			Provider: AlertProvider{
+				DefaultConfig: Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com"},
+				Overrides: []Override{
+					{
+						Group:  "group",
+						Config: Config{To: "group-to@example.com"},
+					},
+				},
+			},
+			InputGroup:     "group",
+			InputAlert:     alert.Alert{ProviderOverride: map[string]any{"api-key": "SG.override", "to": "alert-to@example.com", "from": "alert-from@example.com"}},
+			ExpectedOutput: Config{APIKey: "SG.override", From: "alert-from@example.com", To: "alert-to@example.com"},
+		},
+		{
+			Name: "provider-with-multiple-overrides-pick-correct-group",
+			Provider: AlertProvider{
+				DefaultConfig: Config{APIKey: "SG.default", From: "default@example.com", To: "default@example.com"},
+				Overrides: []Override{
+					{
+						Group:  "group1",
+						Config: Config{APIKey: "SG.group1", To: "group1@example.com"},
+					},
+					{
+						Group:  "group2",
+						Config: Config{APIKey: "SG.group2", From: "group2@example.com"},
+					},
+				},
+			},
+			InputGroup:     "group2",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{APIKey: "SG.group2", From: "group2@example.com", To: "default@example.com"},
+		},
+		{
+			Name: "provider-partial-override-hierarchy",
+			Provider: AlertProvider{
+				DefaultConfig: Config{APIKey: "SG.default", From: "default@example.com", To: "default@example.com"},
+				Overrides: []Override{
+					{
+						Group:  "test-group",
+						Config: Config{From: "group@example.com"},
+					},
+				},
+			},
+			InputGroup:     "test-group",
+			InputAlert:     alert.Alert{ProviderOverride: map[string]any{"to": "alert@example.com"}},
+			ExpectedOutput: Config{APIKey: "SG.default", From: "group@example.com", To: "alert@example.com"},
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			got, err := scenario.Provider.GetConfig(scenario.InputGroup, &scenario.InputAlert)
+			if err != nil {
+				t.Fatalf("unexpected error: %s", err)
+			}
+			if got.APIKey != scenario.ExpectedOutput.APIKey {
+				t.Errorf("expected APIKey to be %s, got %s", scenario.ExpectedOutput.APIKey, got.APIKey)
+			}
+			if got.From != scenario.ExpectedOutput.From {
+				t.Errorf("expected From to be %s, got %s", scenario.ExpectedOutput.From, got.From)
+			}
+			if got.To != scenario.ExpectedOutput.To {
+				t.Errorf("expected To to be %s, got %s", scenario.ExpectedOutput.To, got.To)
+			}
+			// Test ValidateOverrides as well, since it really just calls GetConfig
+			if err = scenario.Provider.ValidateOverrides(scenario.InputGroup, &scenario.InputAlert); err != nil {
+				t.Errorf("unexpected error: %s", err)
+			}
+		})
+	}
+}
+
+func TestConfig_Validate(t *testing.T) {
+	scenarios := []struct {
+		Name          string
+		Config        Config
+		ExpectedError error
+	}{
+		{
+			Name:          "missing-api-key",
+			Config:        Config{APIKey: "", From: "test@example.com", To: "to@example.com"},
+			ExpectedError: ErrAPIKeyNotSet,
+		},
+		{
+			Name:          "missing-from",
+			Config:        Config{APIKey: "SG.test", From: "", To: "to@example.com"},
+			ExpectedError: ErrFromNotSet,
+		},
+		{
+			Name:          "missing-to",
+			Config:        Config{APIKey: "SG.test", From: "test@example.com", To: ""},
+			ExpectedError: ErrToNotSet,
+		},
+		{
+			Name:          "valid-config",
+			Config:        Config{APIKey: "SG.test", From: "test@example.com", To: "to@example.com"},
+			ExpectedError: nil,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			err := scenario.Config.Validate()
+			if scenario.ExpectedError == nil && err != nil {
+				t.Errorf("expected no error, got %v", err)
+			}
+			if scenario.ExpectedError != nil && err == nil {
+				t.Errorf("expected error %v, got none", scenario.ExpectedError)
+			}
+			if scenario.ExpectedError != nil && err != nil && err.Error() != scenario.ExpectedError.Error() {
+				t.Errorf("expected error %v, got %v", scenario.ExpectedError, err)
+			}
+		})
+	}
+}
+
+func TestConfig_Merge(t *testing.T) {
+	config := Config{APIKey: "SG.original", From: "from@example.com", To: "to@example.com"}
+	override := Config{APIKey: "SG.override", To: "override@example.com"}
+	config.Merge(&override)
+	if config.APIKey != "SG.override" {
+		t.Errorf("expected APIKey to be SG.override, got %s", config.APIKey)
+	}
+	if config.From != "from@example.com" {
+		t.Errorf("expected From to remain from@example.com, got %s", config.From)
+	}
+	if config.To != "override@example.com" {
+		t.Errorf("expected To to be override@example.com, got %s", config.To)
+	}
+}
+
+func TestConfig_MergeWithClientConfig(t *testing.T) {
+	config := Config{APIKey: "SG.original", From: "from@example.com", To: "to@example.com"}
+	override := Config{APIKey: "SG.override", ClientConfig: &client.Config{Timeout: 30000}}
+	config.Merge(&override)
+	if config.APIKey != "SG.override" {
+		t.Errorf("expected APIKey to be SG.override, got %s", config.APIKey)
+	}
+	if config.ClientConfig == nil {
+		t.Error("expected ClientConfig to be set")
+	}
+	if config.ClientConfig.Timeout != 30000 {
+		t.Errorf("expected ClientConfig.Timeout to be 30000, got %d", config.ClientConfig.Timeout)
+	}
+	config2 := Config{APIKey: "SG.test", From: "from@example.com", To: "to@example.com", ClientConfig: &client.Config{Timeout: 10000}}
+	override2 := Config{APIKey: "SG.override2"}
+	config2.Merge(&override2)
+	if config2.ClientConfig.Timeout != 10000 {
+		t.Errorf("expected ClientConfig.Timeout to remain 10000, got %d", config2.ClientConfig.Timeout)
+	}
+}

alerting/provider/signal/signal.go

@@ -0,0 +1,196 @@
+package signal
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrApiURLNotSet           = errors.New("api-url not set")
+	ErrNumberNotSet           = errors.New("number not set")
+	ErrRecipientsNotSet       = errors.New("recipients not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	ApiURL     string   `yaml:"api-url"`    // Signal API URL (e.g., signal-cli-rest-api instance)
+	Number     string   `yaml:"number"`     // Sender phone number
+	Recipients []string `yaml:"recipients"` // List of recipient phone numbers
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.ApiURL) == 0 {
+		return ErrApiURLNotSet
+	}
+	if !strings.HasSuffix(cfg.ApiURL, "/v2/send") {
+		cfg.ApiURL = cfg.ApiURL + "/v2/send"
+	}
+	if len(cfg.Number) == 0 {
+		return ErrNumberNotSet
+	}
+	if len(cfg.Recipients) == 0 {
+		return ErrRecipientsNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.ApiURL) > 0 {
+		cfg.ApiURL = override.ApiURL
+	}
+	if len(override.Number) > 0 {
+		cfg.Number = override.Number
+	}
+	if len(override.Recipients) > 0 {
+		cfg.Recipients = override.Recipients
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Signal
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	for _, recipient := range cfg.Recipients {
+		body, err := provider.buildRequestBody(cfg, ep, alert, result, resolved, recipient)
+		if err != nil {
+			return err
+		}
+		buffer := bytes.NewBuffer(body)
+		request, err := http.NewRequest(http.MethodPost, cfg.ApiURL, buffer)
+		if err != nil {
+			return err
+		}
+		request.Header.Set("Content-Type", "application/json")
+		response, err := client.GetHTTPClient(nil).Do(request)
+		if err != nil {
+			return err
+		}
+		if response.StatusCode >= 400 {
+			body, _ := io.ReadAll(response.Body)
+			response.Body.Close()
+			return fmt.Errorf("call to signal alert returned status code %d: %s", response.StatusCode, string(body))
+		}
+		response.Body.Close()
+	}
+	return nil
+}
+
+type Body struct {
+	Message    string   `json:"message"`
+	Number     string   `json:"number"`
+	Recipients []string `json:"recipients"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool, recipient string) ([]byte, error) {
+	var message string
+	if resolved {
+		message = fmt.Sprintf("🟢 RESOLVED: %s\nAlert has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+	} else {
+		message = fmt.Sprintf("🔴 ALERT: %s\nEndpoint has failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+	}
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		message += fmt.Sprintf("\n\nDescription: %s", alertDescription)
+	}
+	if len(result.ConditionResults) > 0 {
+		message += "\n\nCondition results:"
+		for _, conditionResult := range result.ConditionResults {
+			var status string
+			if conditionResult.Success {
+				status = "✅"
+			} else {
+				status = "❌"
+			}
+			message += fmt.Sprintf("\n%s %s", status, conditionResult.Condition)
+		}
+	}
+	body := Body{
+		Message:    message,
+		Number:     cfg.Number,
+		Recipients: []string{recipient},
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/signal/signal_test.go

@@ -0,0 +1,151 @@
+package signal
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{ApiURL: "http://localhost:8080", Number: "+1234567890", Recipients: []string{"+0987654321"}}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-api-url",
+			provider: AlertProvider{DefaultConfig: Config{Number: "+1234567890", Recipients: []string{"+0987654321"}}},
+			expected: ErrApiURLNotSet,
+		},
+		{
+			name:     "invalid-number",
+			provider: AlertProvider{DefaultConfig: Config{ApiURL: "http://localhost:8080", Recipients: []string{"+0987654321"}}},
+			expected: ErrNumberNotSet,
+		},
+		{
+			name:     "invalid-recipients",
+			provider: AlertProvider{DefaultConfig: Config{ApiURL: "http://localhost:8080", Number: "+1234567890"}},
+			expected: ErrRecipientsNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{ApiURL: "http://localhost:8080", Number: "+1234567890", Recipients: []string{"+0987654321", "+1111111111"}}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.URL.Path != "/v2/send" {
+					t.Errorf("expected path /v2/send, got %s", r.URL.Path)
+				}
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["number"] != "+1234567890" {
+					t.Errorf("expected number to be '+1234567890', got %v", body["number"])
+				}
+				recipients := body["recipients"].([]interface{})
+				if len(recipients) != 1 {
+					t.Errorf("expected 1 recipient per request, got %d", len(recipients))
+				}
+				message := body["message"].(string)
+				if !strings.Contains(message, "ALERT") {
+					t.Errorf("expected message to contain 'ALERT', got %s", message)
+				}
+				if !strings.Contains(message, "failed 3 time(s)") {
+					t.Errorf("expected message to contain failure count, got %s", message)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{ApiURL: "http://localhost:8080", Number: "+1234567890", Recipients: []string{"+0987654321"}}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				message := body["message"].(string)
+				if !strings.Contains(message, "RESOLVED") {
+					t.Errorf("expected message to contain 'RESOLVED', got %s", message)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{ApiURL: "http://localhost:8080", Number: "+1234567890", Recipients: []string{"+0987654321"}}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

alerting/provider/signl4/signl4.go

@@ -0,0 +1,184 @@
+package signl4
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrTeamSecretNotSet       = errors.New("team-secret not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	TeamSecret string `yaml:"team-secret"` // SIGNL4 team secret
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.TeamSecret) == 0 {
+		return ErrTeamSecretNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.TeamSecret) > 0 {
+		cfg.TeamSecret = override.TeamSecret
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using SIGNL4
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	body, err := provider.buildRequestBody(ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	webhookURL := fmt.Sprintf("https://connect.signl4.com/webhook/%s", cfg.TeamSecret)
+	request, err := http.NewRequest(http.MethodPost, webhookURL, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to signl4 alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type Body struct {
+	Title         string `json:"Title"`
+	Message       string `json:"Message"`
+	XS4Service    string `json:"X-S4-Service"`
+	XS4Status     string `json:"X-S4-Status"`
+	XS4ExternalID string `json:"X-S4-ExternalID"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var title, message, status string
+	if resolved {
+		title = fmt.Sprintf("RESOLVED: %s", ep.DisplayName())
+		message = fmt.Sprintf("An alert for %s has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+		status = "resolved"
+	} else {
+		title = fmt.Sprintf("TRIGGERED: %s", ep.DisplayName())
+		message = fmt.Sprintf("An alert for %s has been triggered due to having failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+		status = "new"
+	}
+	var conditionResults string
+	if len(result.ConditionResults) > 0 {
+		conditionResults = "\n\nCondition results:\n"
+		for _, conditionResult := range result.ConditionResults {
+			var prefix string
+			if conditionResult.Success {
+				prefix = "✓"
+			} else {
+				prefix = "✗"
+			}
+			conditionResults += fmt.Sprintf("%s %s\n", prefix, conditionResult.Condition)
+		}
+	}
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		message += "\n\nDescription: " + alertDescription
+	}
+	message += conditionResults
+	body := Body{
+		Title:         title,
+		Message:       message,
+		XS4Service:    ep.DisplayName(),
+		XS4Status:     status,
+		XS4ExternalID: fmt.Sprintf("gatus-%s", ep.Key()),
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/signl4/signl4_test.go

@@ -0,0 +1,392 @@
+package signl4
+
+import (
+	"encoding/json"
+	"net/http"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	invalidProvider := AlertProvider{DefaultConfig: Config{TeamSecret: ""}}
+	if err := invalidProvider.Validate(); err == nil {
+		t.Error("provider shouldn't have been valid")
+	}
+	validProvider := AlertProvider{DefaultConfig: Config{TeamSecret: "team-secret-123"}}
+	if err := validProvider.Validate(); err != nil {
+		t.Error("provider should've been valid")
+	}
+}
+
+func TestAlertProvider_ValidateWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				Config: Config{TeamSecret: "team-secret-123"},
+				Group:  "",
+			},
+		},
+	}
+	if err := providerWithInvalidOverrideGroup.Validate(); err == nil {
+		t.Error("provider Group shouldn't have been valid")
+	}
+	providerWithInvalidOverrideTo := AlertProvider{
+		Overrides: []Override{
+			{
+				Config: Config{TeamSecret: ""},
+				Group:  "group",
+			},
+		},
+	}
+	if err := providerWithInvalidOverrideTo.Validate(); err == nil {
+		t.Error("provider team secret shouldn't have been valid")
+	}
+	providerWithValidOverride := AlertProvider{
+		DefaultConfig: Config{TeamSecret: "team-secret-123"},
+		Overrides: []Override{
+			{
+				Config: Config{TeamSecret: "team-secret-override"},
+				Group:  "group",
+			},
+		},
+	}
+	if err := providerWithValidOverride.Validate(); err != nil {
+		t.Error("provider should've been valid")
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name             string
+		Provider         AlertProvider
+		Alert            alert.Alert
+		Resolved         bool
+		MockRoundTripper test.MockRoundTripper
+		ExpectedError    bool
+	}{
+		{
+			Name:     "triggered",
+			Provider: AlertProvider{DefaultConfig: Config{TeamSecret: "team-secret-123"}},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "triggered-error",
+			Provider: AlertProvider{DefaultConfig: Config{TeamSecret: "team-secret-123"}},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+		{
+			Name:     "resolved",
+			Provider: AlertProvider{DefaultConfig: Config{TeamSecret: "team-secret-123"}},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "resolved-error",
+			Provider: AlertProvider{DefaultConfig: Config{TeamSecret: "team-secret-123"}},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
+			err := scenario.Provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if scenario.ExpectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.ExpectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_buildRequestBody(t *testing.T) {
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name         string
+		Provider     AlertProvider
+		Endpoint     endpoint.Endpoint
+		Alert        alert.Alert
+		NoConditions bool
+		Resolved     bool
+		ExpectedBody string
+	}{
+		{
+			Name:         "triggered",
+			Provider:     AlertProvider{},
+			Endpoint:     endpoint.Endpoint{Name: "name"},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "{\"Title\":\"TRIGGERED: name\",\"Message\":\"An alert for name has been triggered due to having failed 3 time(s) in a row\\n\\nDescription: description-1\\n\\nCondition results:\\n✗ [CONNECTED] == true\\n✗ [STATUS] == 200\\n\",\"X-S4-Service\":\"name\",\"X-S4-Status\":\"new\",\"X-S4-ExternalID\":\"gatus-_name\"}",
+		},
+		{
+			Name:         "triggered-with-group",
+			Provider:     AlertProvider{},
+			Endpoint:     endpoint.Endpoint{Name: "name", Group: "group"},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "{\"Title\":\"TRIGGERED: group/name\",\"Message\":\"An alert for group/name has been triggered due to having failed 3 time(s) in a row\\n\\nDescription: description-1\\n\\nCondition results:\\n✗ [CONNECTED] == true\\n✗ [STATUS] == 200\\n\",\"X-S4-Service\":\"group/name\",\"X-S4-Status\":\"new\",\"X-S4-ExternalID\":\"gatus-group_name\"}",
+		},
+		{
+			Name:         "triggered-with-no-conditions",
+			NoConditions: true,
+			Provider:     AlertProvider{},
+			Endpoint:     endpoint.Endpoint{Name: "name"},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "{\"Title\":\"TRIGGERED: name\",\"Message\":\"An alert for name has been triggered due to having failed 3 time(s) in a row\\n\\nDescription: description-1\",\"X-S4-Service\":\"name\",\"X-S4-Status\":\"new\",\"X-S4-ExternalID\":\"gatus-_name\"}",
+		},
+		{
+			Name:         "resolved",
+			Provider:     AlertProvider{},
+			Endpoint:     endpoint.Endpoint{Name: "name"},
+			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     true,
+			ExpectedBody: "{\"Title\":\"RESOLVED: name\",\"Message\":\"An alert for name has been resolved after passing successfully 5 time(s) in a row\\n\\nDescription: description-2\\n\\nCondition results:\\n✓ [CONNECTED] == true\\n✓ [STATUS] == 200\\n\",\"X-S4-Service\":\"name\",\"X-S4-Status\":\"resolved\",\"X-S4-ExternalID\":\"gatus-_name\"}",
+		},
+		{
+			Name:         "resolved-with-group",
+			Provider:     AlertProvider{},
+			Endpoint:     endpoint.Endpoint{Name: "name", Group: "group"},
+			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     true,
+			ExpectedBody: "{\"Title\":\"RESOLVED: group/name\",\"Message\":\"An alert for group/name has been resolved after passing successfully 5 time(s) in a row\\n\\nDescription: description-2\\n\\nCondition results:\\n✓ [CONNECTED] == true\\n✓ [STATUS] == 200\\n\",\"X-S4-Service\":\"group/name\",\"X-S4-Status\":\"resolved\",\"X-S4-ExternalID\":\"gatus-group_name\"}",
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			var conditionResults []*endpoint.ConditionResult
+			if !scenario.NoConditions {
+				conditionResults = []*endpoint.ConditionResult{
+					{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+					{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+				}
+			}
+			body, err := scenario.Provider.buildRequestBody(
+				&scenario.Endpoint,
+				&scenario.Alert,
+				&endpoint.Result{
+					ConditionResults: conditionResults,
+				},
+				scenario.Resolved,
+			)
+			if err != nil {
+				t.Fatalf("buildRequestBody returned an error: %v", err)
+			}
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
+			}
+			out := make(map[string]interface{})
+			if err := json.Unmarshal(body, &out); err != nil {
+				t.Error("expected body to be valid JSON, got error:", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}
+
+func TestAlertProvider_GetConfig(t *testing.T) {
+	scenarios := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		InputAlert     alert.Alert
+		ExpectedOutput Config
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				DefaultConfig: Config{TeamSecret: "team-secret-123"},
+				Overrides:     nil,
+			},
+			InputGroup:     "",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{TeamSecret: "team-secret-123"},
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				DefaultConfig: Config{TeamSecret: "team-secret-123"},
+				Overrides:     nil,
+			},
+			InputGroup:     "group",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{TeamSecret: "team-secret-123"},
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				DefaultConfig: Config{TeamSecret: "team-secret-123"},
+				Overrides: []Override{
+					{
+						Group:  "group",
+						Config: Config{TeamSecret: "team-secret-override"},
+					},
+				},
+			},
+			InputGroup:     "",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{TeamSecret: "team-secret-123"},
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{TeamSecret: "team-secret-123"},
+				Overrides: []Override{
+					{
+						Group:  "group",
+						Config: Config{TeamSecret: "team-secret-override"},
+					},
+				},
+			},
+			InputGroup:     "group",
+			InputAlert:     alert.Alert{},
+			ExpectedOutput: Config{TeamSecret: "team-secret-override"},
+		},
+		{
+			Name: "provider-with-group-override-and-alert-override--alert-override-should-take-precedence",
+			Provider: AlertProvider{
+				DefaultConfig: Config{TeamSecret: "team-secret-123"},
+				Overrides: []Override{
+					{
+						Group:  "group",
+						Config: Config{TeamSecret: "team-secret-override"},
+					},
+				},
+			},
+			InputGroup:     "group",
+			InputAlert:     alert.Alert{ProviderOverride: map[string]any{"team-secret": "team-secret-alert"}},
+			ExpectedOutput: Config{TeamSecret: "team-secret-alert"},
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			got, err := scenario.Provider.GetConfig(scenario.InputGroup, &scenario.InputAlert)
+			if err != nil {
+				t.Fatalf("unexpected error: %s", err)
+			}
+			if got.TeamSecret != scenario.ExpectedOutput.TeamSecret {
+				t.Errorf("expected team secret to be %s, got %s", scenario.ExpectedOutput.TeamSecret, got.TeamSecret)
+			}
+			// Test ValidateOverrides as well, since it really just calls GetConfig
+			if err = scenario.Provider.ValidateOverrides(scenario.InputGroup, &scenario.InputAlert); err != nil {
+				t.Errorf("unexpected error: %s", err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetConfigWithInvalidAlertOverride(t *testing.T) {
+	// Test case 1: Empty override should be ignored, default config should be used
+	provider := AlertProvider{
+		DefaultConfig: Config{TeamSecret: "team-secret-123"},
+	}
+	alertWithEmptyOverride := alert.Alert{
+		ProviderOverride: map[string]any{"team-secret": ""},
+	}
+	cfg, err := provider.GetConfig("", &alertWithEmptyOverride)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if cfg.TeamSecret != "team-secret-123" {
+		t.Errorf("expected team secret to remain default 'team-secret-123', got %s", cfg.TeamSecret)
+	}
+
+	// Test case 2: Invalid default config with no valid override should fail
+	providerWithInvalidDefault := AlertProvider{
+		DefaultConfig: Config{TeamSecret: ""},
+	}
+	alertWithEmptyOverride2 := alert.Alert{
+		ProviderOverride: map[string]any{"team-secret": ""},
+	}
+	_, err = providerWithInvalidDefault.GetConfig("", &alertWithEmptyOverride2)
+	if err == nil {
+		t.Error("expected error due to invalid default config, got none")
+	}
+	if err != ErrTeamSecretNotSet {
+		t.Errorf("expected ErrTeamSecretNotSet, got %v", err)
+	}
+}
+
+func TestAlertProvider_ValidateWithDuplicateGroupOverride(t *testing.T) {
+	providerWithDuplicateOverride := AlertProvider{
+		DefaultConfig: Config{TeamSecret: "team-secret-123"},
+		Overrides: []Override{
+			{
+				Group:  "group1",
+				Config: Config{TeamSecret: "team-secret-override-1"},
+			},
+			{
+				Group:  "group1",
+				Config: Config{TeamSecret: "team-secret-override-2"},
+			},
+		},
+	}
+	if err := providerWithDuplicateOverride.Validate(); err == nil {
+		t.Error("provider should not have been valid due to duplicate group override")
+	}
+	if err := providerWithDuplicateOverride.Validate(); err != ErrDuplicateGroupOverride {
+		t.Errorf("expected ErrDuplicateGroupOverride, got %v", providerWithDuplicateOverride.Validate())
+	}
+}
+
+func TestAlertProvider_ValidateOverridesWithInvalidAlert(t *testing.T) {
+	provider := AlertProvider{
+		DefaultConfig: Config{TeamSecret: ""},
+	}
+	alertWithEmptyOverride := alert.Alert{
+		ProviderOverride: map[string]any{"team-secret": ""},
+	}
+	err := provider.ValidateOverrides("", &alertWithEmptyOverride)
+	if err == nil {
+		t.Error("expected error due to invalid default config, got none")
+	}
+	if err != ErrTeamSecretNotSet {
+		t.Errorf("expected ErrTeamSecretNotSet, got %v", err)
+	}
+}

alerting/provider/slack/slack.go

@@ -20,7 +20,8 @@ var (
 )
 
 type Config struct {
-	WebhookURL string `yaml:"webhook-url"` // Slack webhook URL
+	WebhookURL string `yaml:"webhook-url"`     // Slack webhook URL
+	Title      string `yaml:"title,omitempty"` // Title of the message that will be sent
 }
 
 func (cfg *Config) Validate() error {
@@ -34,6 +35,9 @@ func (cfg *Config) Merge(override *Config) {
 	if len(override.WebhookURL) > 0 {
 		cfg.WebhookURL = override.WebhookURL
 	}
+	if len(override.Title) > 0 {
+		cfg.Title = override.Title
+	}
 }
 
 // AlertProvider is the configuration necessary for sending an alert using Slack
@@ -73,7 +77,7 @@ func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, r
 	if err != nil {
 		return err
 	}
-	buffer := bytes.NewBuffer(provider.buildRequestBody(ep, alert, result, resolved))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(cfg, ep, alert, result, resolved))
 	request, err := http.NewRequest(http.MethodPost, cfg.WebhookURL, buffer)
 	if err != nil {
 		return err
@@ -111,7 +115,7 @@ type Field struct {
 }
 
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) []byte {
+func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) []byte {
 	var message, color string
 	if resolved {
 		message = fmt.Sprintf("An alert for *%s* has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
@@ -138,13 +142,16 @@ func (provider *AlertProvider) buildRequestBody(ep *endpoint.Endpoint, alert *al
 		Text: "",
 		Attachments: []Attachment{
 			{
-				Title: ":helmet_with_white_cross: Gatus",
+				Title: cfg.Title,
 				Text:  message + description,
 				Short: false,
 				Color: color,
 			},
 		},
 	}
+	if len(body.Attachments[0].Title) == 0 {
+		body.Attachments[0].Title = ":helmet_with_white_cross: Gatus"
+	}
 	if len(formattedConditionResults) > 0 {
 		body.Attachments[0].Fields = append(body.Attachments[0].Fields, Field{
 			Title: "Condition results",

alerting/provider/slack/slack_test.go

@@ -150,7 +150,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 	}{
 		{
 			Name:         "triggered",
-			Provider:     AlertProvider{},
+			Provider:     AlertProvider{DefaultConfig: Config{WebhookURL: "http://example.com"}},
 			Endpoint:     endpoint.Endpoint{Name: "name"},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
@@ -158,7 +158,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 		},
 		{
 			Name:         "triggered-with-group",
-			Provider:     AlertProvider{},
+			Provider:     AlertProvider{DefaultConfig: Config{WebhookURL: "http://example.com"}},
 			Endpoint:     endpoint.Endpoint{Name: "name", Group: "group"},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
@@ -167,7 +167,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 		{
 			Name:         "triggered-with-no-conditions",
 			NoConditions: true,
-			Provider:     AlertProvider{},
+			Provider:     AlertProvider{DefaultConfig: Config{WebhookURL: "http://example.com"}},
 			Endpoint:     endpoint.Endpoint{Name: "name"},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
@@ -175,7 +175,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 		},
 		{
 			Name:         "resolved",
-			Provider:     AlertProvider{},
+			Provider:     AlertProvider{DefaultConfig: Config{WebhookURL: "http://example.com"}},
 			Endpoint:     endpoint.Endpoint{Name: "name"},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
@@ -183,12 +183,20 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 		},
 		{
 			Name:         "resolved-with-group",
-			Provider:     AlertProvider{},
+			Provider:     AlertProvider{DefaultConfig: Config{WebhookURL: "http://example.com"}},
 			Endpoint:     endpoint.Endpoint{Name: "name", Group: "group"},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
 			ExpectedBody: "{\"text\":\"\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"text\":\"An alert for *group/name* has been resolved after passing successfully 5 time(s) in a row:\\n\\u003e description-2\",\"short\":false,\"color\":\"#36A64F\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
 		},
+		{
+			Name:         "resolved-with-group-and-custom-title",
+			Provider:     AlertProvider{DefaultConfig: Config{WebhookURL: "http://example.com", Title: "custom title"}},
+			Endpoint:     endpoint.Endpoint{Name: "name", Group: "group"},
+			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     true,
+			ExpectedBody: "{\"text\":\"\",\"attachments\":[{\"title\":\"custom title\",\"text\":\"An alert for *group/name* has been resolved after passing successfully 5 time(s) in a row:\\n\\u003e description-2\",\"short\":false,\"color\":\"#36A64F\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
+		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {
@@ -199,7 +207,12 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 					{Condition: "[STATUS] == 200", Success: scenario.Resolved},
 				}
 			}
+			cfg, err := scenario.Provider.GetConfig(scenario.Endpoint.Group, &scenario.Alert)
+			if err != nil {
+				t.Fatal("couldn't get config:", err.Error())
+			}
 			body := scenario.Provider.buildRequestBody(
+				cfg,
 				&scenario.Endpoint,
 				&scenario.Alert,
 				&endpoint.Result{

alerting/provider/splunk/splunk.go

@@ -0,0 +1,220 @@
+package splunk
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrHecURLNotSet           = errors.New("hec-url not set")
+	ErrHecTokenNotSet         = errors.New("hec-token not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	HecURL     string `yaml:"hec-url"`              // Splunk HEC (HTTP Event Collector) URL
+	HecToken   string `yaml:"hec-token"`            // Splunk HEC token
+	Source     string `yaml:"source,omitempty"`     // Event source
+	SourceType string `yaml:"sourcetype,omitempty"` // Event source type
+	Index      string `yaml:"index,omitempty"`      // Splunk index
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.HecURL) == 0 {
+		return ErrHecURLNotSet
+	}
+	if len(cfg.HecToken) == 0 {
+		return ErrHecTokenNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.HecURL) > 0 {
+		cfg.HecURL = override.HecURL
+	}
+	if len(override.HecToken) > 0 {
+		cfg.HecToken = override.HecToken
+	}
+	if len(override.Source) > 0 {
+		cfg.Source = override.Source
+	}
+	if len(override.SourceType) > 0 {
+		cfg.SourceType = override.SourceType
+	}
+	if len(override.Index) > 0 {
+		cfg.Index = override.Index
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Splunk
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	body, err := provider.buildRequestBody(cfg, ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	request, err := http.NewRequest(http.MethodPost, fmt.Sprintf("%s/services/collector/event", cfg.HecURL), buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	request.Header.Set("Authorization", fmt.Sprintf("Splunk %s", cfg.HecToken))
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to splunk alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type Body struct {
+	Time       int64  `json:"time"`
+	Source     string `json:"source,omitempty"`
+	SourceType string `json:"sourcetype,omitempty"`
+	Index      string `json:"index,omitempty"`
+	Event      Event  `json:"event"`
+}
+
+type Event struct {
+	AlertType   string                      `json:"alert_type"`
+	Endpoint    string                      `json:"endpoint"`
+	Group       string                      `json:"group,omitempty"`
+	Status      string                      `json:"status"`
+	Message     string                      `json:"message"`
+	Description string                      `json:"description,omitempty"`
+	Conditions  []*endpoint.ConditionResult `json:"conditions,omitempty"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var alertType, status, message string
+	if resolved {
+		alertType = "resolved"
+		status = "ok"
+		message = fmt.Sprintf("Alert for %s has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+	} else {
+		alertType = "triggered"
+		status = "critical"
+		message = fmt.Sprintf("Alert for %s has been triggered due to having failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+	}
+	event := Event{
+		AlertType:   alertType,
+		Endpoint:    ep.DisplayName(),
+		Group:       ep.Group,
+		Status:      status,
+		Message:     message,
+		Description: alert.GetDescription(),
+	}
+	if len(result.ConditionResults) > 0 {
+		event.Conditions = result.ConditionResults
+	}
+	body := Body{
+		Time:  time.Now().Unix(),
+		Event: event,
+	}
+	// Set optional fields
+	if cfg.Source != "" {
+		body.Source = cfg.Source
+	} else {
+		body.Source = "gatus"
+	}
+	if cfg.SourceType != "" {
+		body.SourceType = cfg.SourceType
+	} else {
+		body.SourceType = "gatus:alert"
+	}
+	if cfg.Index != "" {
+		body.Index = cfg.Index
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/splunk/splunk_test.go

@@ -0,0 +1,155 @@
+package splunk
+
+import (
+	"encoding/json"
+	"net/http"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{HecURL: "https://splunk.example.com:8088", HecToken: "token123"}},
+			expected: nil,
+		},
+		{
+			name:     "valid-with-index",
+			provider: AlertProvider{DefaultConfig: Config{HecURL: "https://splunk.example.com:8088", HecToken: "token123", Index: "main"}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-hec-url",
+			provider: AlertProvider{DefaultConfig: Config{HecToken: "token123"}},
+			expected: ErrHecURLNotSet,
+		},
+		{
+			name:     "invalid-hec-token",
+			provider: AlertProvider{DefaultConfig: Config{HecURL: "https://splunk.example.com:8088"}},
+			expected: ErrHecTokenNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{HecURL: "https://splunk.example.com:8088", HecToken: "token123"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.URL.Path != "/services/collector/event" {
+					t.Errorf("expected path /services/collector/event, got %s", r.URL.Path)
+				}
+				if r.Header.Get("Authorization") != "Splunk token123" {
+					t.Errorf("expected Authorization header to be 'Splunk token123', got %s", r.Header.Get("Authorization"))
+				}
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["time"] == nil {
+					t.Error("expected 'time' field in request body")
+				}
+				event := body["event"].(map[string]interface{})
+				if event["alert_type"] != "triggered" {
+					t.Errorf("expected alert_type to be 'triggered', got %v", event["alert_type"])
+				}
+				if event["status"] != "critical" {
+					t.Errorf("expected status to be 'critical', got %v", event["status"])
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{HecURL: "https://splunk.example.com:8088", HecToken: "token123", Index: "main"}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["index"] != "main" {
+					t.Errorf("expected index to be 'main', got %v", body["index"])
+				}
+				event := body["event"].(map[string]interface{})
+				if event["alert_type"] != "resolved" {
+					t.Errorf("expected alert_type to be 'resolved', got %v", event["alert_type"])
+				}
+				if event["status"] != "ok" {
+					t.Errorf("expected status to be 'ok', got %v", event["status"])
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{HecURL: "https://splunk.example.com:8088", HecToken: "token123"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusForbidden, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

alerting/provider/squadcast/squadcast.go

@@ -0,0 +1,190 @@
+package squadcast
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrWebhookURLNotSet       = errors.New("webhook-url not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	WebhookURL string `yaml:"webhook-url"` // Squadcast webhook URL
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.WebhookURL) == 0 {
+		return ErrWebhookURLNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.WebhookURL) > 0 {
+		cfg.WebhookURL = override.WebhookURL
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Squadcast
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	body, err := provider.buildRequestBody(ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	request, err := http.NewRequest(http.MethodPost, cfg.WebhookURL, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to squadcast alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type Body struct {
+	Message     string            `json:"message"`
+	Description string            `json:"description,omitempty"`
+	EventID     string            `json:"event_id"`
+	Status      string            `json:"status"`
+	Tags        map[string]string `json:"tags,omitempty"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var message, status string
+	eventID := fmt.Sprintf("gatus-%s", ep.Key())
+	if resolved {
+		message = fmt.Sprintf("RESOLVED: %s", ep.DisplayName())
+		status = "resolve"
+	} else {
+		message = fmt.Sprintf("ALERT: %s", ep.DisplayName())
+		status = "trigger"
+	}
+	description := fmt.Sprintf("Endpoint: %s\n", ep.DisplayName())
+	if resolved {
+		description += fmt.Sprintf("Alert has been resolved after passing successfully %d time(s) in a row\n", alert.SuccessThreshold)
+	} else {
+		description += fmt.Sprintf("Endpoint has failed %d time(s) in a row\n", alert.FailureThreshold)
+	}
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		description += fmt.Sprintf("\nDescription: %s", alertDescription)
+	}
+	if len(result.ConditionResults) > 0 {
+		description += "\n\nCondition Results:"
+		for _, conditionResult := range result.ConditionResults {
+			var status string
+			if conditionResult.Success {
+				status = "✅"
+			} else {
+				status = "❌"
+			}
+			description += fmt.Sprintf("\n%s %s", status, conditionResult.Condition)
+		}
+	}
+	body := Body{
+		Message:     message,
+		Description: description,
+		EventID:     eventID,
+		Status:      status,
+		Tags: map[string]string{
+			"endpoint": ep.Name,
+			"group":    ep.Group,
+			"source":   "gatus",
+		},
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/squadcast/squadcast_test.go

@@ -0,0 +1,141 @@
+package squadcast
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://api.squadcast.com/v3/incidents/api/abcd1234"}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-webhook-url",
+			provider: AlertProvider{DefaultConfig: Config{}},
+			expected: ErrWebhookURLNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://api.squadcast.com/v3/incidents/api/abcd1234"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["status"] != "trigger" {
+					t.Errorf("expected status to be 'trigger', got %v", body["status"])
+				}
+				if body["event_id"] == nil {
+					t.Error("expected 'event_id' field in request body")
+				}
+				message := body["message"].(string)
+				if !strings.Contains(message, "ALERT") {
+					t.Errorf("expected message to contain 'ALERT', got %s", message)
+				}
+				description := body["description"].(string)
+				if !strings.Contains(description, "failed 3 time(s)") {
+					t.Errorf("expected description to contain failure count, got %s", description)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://api.squadcast.com/v3/incidents/api/abcd1234"}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["status"] != "resolve" {
+					t.Errorf("expected status to be 'resolve', got %v", body["status"])
+				}
+				message := body["message"].(string)
+				if !strings.Contains(message, "RESOLVED") {
+					t.Errorf("expected message to contain 'RESOLVED', got %s", message)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://api.squadcast.com/v3/incidents/api/abcd1234"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusUnauthorized, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

alerting/provider/teamsworkflows/teamsworkflows.go

@@ -166,7 +166,10 @@ func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoi
 			Value: conditionResult.Condition,
 		})
 	}
-
+	var description string
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		description = "**Description**: " + alertDescription
+	}
 	cardContent := AdaptiveCardBody{
 		Type:    "AdaptiveCard",
 		Version: "1.4", // Version 1.5 and 1.6 doesn't seem to be supported by Teams as of 27/08/2024
@@ -190,6 +193,11 @@ func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoi
 								Text: message,
 								Wrap: true,
 							},
+							{
+								Type: "TextBlock",
+								Text: description,
+								Wrap: true,
+							},
 							{
 								Type:  "FactSet",
 								Facts: facts,

alerting/provider/teamsworkflows/teamsworkflows_test.go

@@ -152,14 +152,14 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\"attachments\":[{\"content\":{\"type\":\"AdaptiveCard\",\"version\":\"1.4\",\"body\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"TextBlock\",\"text\":\"⛑️ Gatus\",\"wrap\":false,\"size\":\"Medium\",\"weight\":\"Bolder\"},{\"type\":\"TextBlock\",\"text\":\"An alert for **endpoint-name** has been triggered due to having failed 3 time(s) in a row.\",\"wrap\":true},{\"type\":\"FactSet\",\"wrap\":false,\"facts\":[{\"title\":\"❌\",\"value\":\"[CONNECTED] == true\"},{\"title\":\"❌\",\"value\":\"[STATUS] == 200\"}]}],\"style\":\"Default\"}],\"style\":\"Attention\"}],\"msteams\":{\"width\":\"Full\"}},\"contentType\":\"application/vnd.microsoft.card.adaptive\"}],\"type\":\"message\"}",
+			ExpectedBody: "{\"attachments\":[{\"content\":{\"type\":\"AdaptiveCard\",\"version\":\"1.4\",\"body\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"TextBlock\",\"text\":\"⛑️ Gatus\",\"wrap\":false,\"size\":\"Medium\",\"weight\":\"Bolder\"},{\"type\":\"TextBlock\",\"text\":\"An alert for **endpoint-name** has been triggered due to having failed 3 time(s) in a row.\",\"wrap\":true},{\"type\":\"TextBlock\",\"text\":\"**Description**: description-1\",\"wrap\":true},{\"type\":\"FactSet\",\"wrap\":false,\"facts\":[{\"title\":\"❌\",\"value\":\"[CONNECTED] == true\"},{\"title\":\"❌\",\"value\":\"[STATUS] == 200\"}]}],\"style\":\"Default\"}],\"style\":\"Attention\"}],\"msteams\":{\"width\":\"Full\"}},\"contentType\":\"application/vnd.microsoft.card.adaptive\"}],\"type\":\"message\"}",
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\"attachments\":[{\"content\":{\"type\":\"AdaptiveCard\",\"version\":\"1.4\",\"body\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"TextBlock\",\"text\":\"⛑️ Gatus\",\"wrap\":false,\"size\":\"Medium\",\"weight\":\"Bolder\"},{\"type\":\"TextBlock\",\"text\":\"An alert for **endpoint-name** has been resolved after passing successfully 5 time(s) in a row.\",\"wrap\":true},{\"type\":\"FactSet\",\"wrap\":false,\"facts\":[{\"title\":\"✅\",\"value\":\"[CONNECTED] == true\"},{\"title\":\"✅\",\"value\":\"[STATUS] == 200\"}]}],\"style\":\"Default\"}],\"style\":\"Good\"}],\"msteams\":{\"width\":\"Full\"}},\"contentType\":\"application/vnd.microsoft.card.adaptive\"}],\"type\":\"message\"}",
+			ExpectedBody: "{\"attachments\":[{\"content\":{\"type\":\"AdaptiveCard\",\"version\":\"1.4\",\"body\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"TextBlock\",\"text\":\"⛑️ Gatus\",\"wrap\":false,\"size\":\"Medium\",\"weight\":\"Bolder\"},{\"type\":\"TextBlock\",\"text\":\"An alert for **endpoint-name** has been resolved after passing successfully 5 time(s) in a row.\",\"wrap\":true},{\"type\":\"TextBlock\",\"text\":\"**Description**: description-2\",\"wrap\":true},{\"type\":\"FactSet\",\"wrap\":false,\"facts\":[{\"title\":\"✅\",\"value\":\"[CONNECTED] == true\"},{\"title\":\"✅\",\"value\":\"[STATUS] == 200\"}]}],\"style\":\"Default\"}],\"style\":\"Good\"}],\"msteams\":{\"width\":\"Full\"}},\"contentType\":\"application/vnd.microsoft.card.adaptive\"}],\"type\":\"message\"}",
 		},
 		{
 			Name:         "resolved-with-no-conditions",
@@ -167,7 +167,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\"attachments\":[{\"content\":{\"type\":\"AdaptiveCard\",\"version\":\"1.4\",\"body\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"TextBlock\",\"text\":\"⛑️ Gatus\",\"wrap\":false,\"size\":\"Medium\",\"weight\":\"Bolder\"},{\"type\":\"TextBlock\",\"text\":\"An alert for **endpoint-name** has been resolved after passing successfully 5 time(s) in a row.\",\"wrap\":true},{\"type\":\"FactSet\",\"wrap\":false}],\"style\":\"Default\"}],\"style\":\"Good\"}],\"msteams\":{\"width\":\"Full\"}},\"contentType\":\"application/vnd.microsoft.card.adaptive\"}],\"type\":\"message\"}",
+			ExpectedBody: "{\"attachments\":[{\"content\":{\"type\":\"AdaptiveCard\",\"version\":\"1.4\",\"body\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"Container\",\"wrap\":false,\"items\":[{\"type\":\"TextBlock\",\"text\":\"⛑️ Gatus\",\"wrap\":false,\"size\":\"Medium\",\"weight\":\"Bolder\"},{\"type\":\"TextBlock\",\"text\":\"An alert for **endpoint-name** has been resolved after passing successfully 5 time(s) in a row.\",\"wrap\":true},{\"type\":\"TextBlock\",\"text\":\"**Description**: description-2\",\"wrap\":true},{\"type\":\"FactSet\",\"wrap\":false}],\"style\":\"Default\"}],\"style\":\"Good\"}],\"msteams\":{\"width\":\"Full\"}},\"contentType\":\"application/vnd.microsoft.card.adaptive\"}],\"type\":\"message\"}",
 		},
 	}
 	for _, scenario := range scenarios {

alerting/provider/telegram/telegram.go

@@ -14,7 +14,7 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
-const defaultApiUrl = "https://api.telegram.org"
+const ApiURL = "https://api.telegram.org"
 
 var (
 	ErrTokenNotSet            = errors.New("token not set")
@@ -33,7 +33,7 @@ type Config struct {
 
 func (cfg *Config) Validate() error {
 	if len(cfg.ApiUrl) == 0 {
-		cfg.ApiUrl = defaultApiUrl
+		cfg.ApiUrl = ApiURL
 	}
 	if len(cfg.Token) == 0 {
 		return ErrTokenNotSet

alerting/provider/twilio/twilio.go

@@ -29,8 +29,10 @@ type Config struct {
 	From  string `yaml:"from"`
 	To    string `yaml:"to"`
 
+	// TODO in v6.0.0: Rename this to text-triggered
 	TextTwilioTriggered string `yaml:"text-twilio-triggered,omitempty"` // String used in the SMS body and subject (optional)
-	TextTwilioResolved  string `yaml:"text-twilio-resolved,omitempty"`  // String used in the SMS body and subject (optional)
+	// TODO in v6.0.0: Rename this to text-resolved
+	TextTwilioResolved string `yaml:"text-twilio-resolved,omitempty"` // String used in the SMS body and subject (optional)
 }
 
 func (cfg *Config) Validate() error {
@@ -113,13 +115,23 @@ func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoi
 	var message string
 	if resolved {
 		if len(cfg.TextTwilioResolved) > 0 {
-			message = strings.Replace(strings.Replace(cfg.TextTwilioResolved, "{endpoint}", ep.DisplayName(), 1), "{description}", alert.GetDescription(), 1)
+			// Support both old {endpoint}/{description} and new [ENDPOINT]/[ALERT_DESCRIPTION] formats
+			message = cfg.TextTwilioResolved
+			message = strings.Replace(message, "{endpoint}", ep.DisplayName(), 1)
+			message = strings.Replace(message, "{description}", alert.GetDescription(), 1)
+			message = strings.Replace(message, "[ENDPOINT]", ep.DisplayName(), 1)
+			message = strings.Replace(message, "[ALERT_DESCRIPTION]", alert.GetDescription(), 1)
 		} else {
 			message = fmt.Sprintf("RESOLVED: %s - %s", ep.DisplayName(), alert.GetDescription())
 		}
 	} else {
 		if len(cfg.TextTwilioTriggered) > 0 {
-			message = strings.Replace(strings.Replace(cfg.TextTwilioTriggered, "{endpoint}", ep.DisplayName(), 1), "{description}", alert.GetDescription(), 1)
+			// Support both old {endpoint}/{description} and new [ENDPOINT]/[ALERT_DESCRIPTION] formats
+			message = cfg.TextTwilioTriggered
+			message = strings.Replace(message, "{endpoint}", ep.DisplayName(), 1)
+			message = strings.Replace(message, "{description}", alert.GetDescription(), 1)
+			message = strings.Replace(message, "[ENDPOINT]", ep.DisplayName(), 1)
+			message = strings.Replace(message, "[ALERT_DESCRIPTION]", alert.GetDescription(), 1)
 		} else {
 			message = fmt.Sprintf("TRIGGERED: %s - %s", ep.DisplayName(), alert.GetDescription())
 		}

alerting/provider/twilio/twilio_test.go

@@ -129,6 +129,27 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Resolved:     true,
 			ExpectedBody: "Body=RESOLVED%3A+endpoint-name+-+description-2&From=3&To=4",
 		},
+		{
+			Name:         "triggered-with-old-placeholders",
+			Provider:     AlertProvider{DefaultConfig: Config{SID: "1", Token: "2", From: "3", To: "4", TextTwilioTriggered: "Alert: {endpoint} - {description}"}},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "Body=Alert%3A+endpoint-name+-+description-1&From=3&To=4",
+		},
+		{
+			Name:         "triggered-with-new-placeholders",
+			Provider:     AlertProvider{DefaultConfig: Config{SID: "1", Token: "2", From: "3", To: "4", TextTwilioTriggered: "Alert: [ENDPOINT] - [ALERT_DESCRIPTION]"}},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "Body=Alert%3A+endpoint-name+-+description-1&From=3&To=4",
+		},
+		{
+			Name:         "resolved-with-mixed-placeholders",
+			Provider:     AlertProvider{DefaultConfig: Config{SID: "1", Token: "2", From: "3", To: "4", TextTwilioResolved: "Resolved: {endpoint} and [ENDPOINT] - {description} and [ALERT_DESCRIPTION]"}},
+			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     true,
+			ExpectedBody: "Body=Resolved%3A+endpoint-name+and+endpoint-name+-+description-2+and+description-2&From=3&To=4",
+		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {

alerting/provider/vonage/vonage.go

@@ -0,0 +1,212 @@
+package vonage
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+const ApiURL = "https://rest.nexmo.com/sms/json"
+
+var (
+	ErrAPIKeyNotSet           = errors.New("api-key not set")
+	ErrAPISecretNotSet        = errors.New("api-secret not set")
+	ErrFromNotSet             = errors.New("from not set")
+	ErrToNotSet               = errors.New("to not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	APIKey    string   `yaml:"api-key"`
+	APISecret string   `yaml:"api-secret"`
+	From      string   `yaml:"from"`
+	To        []string `yaml:"to"`
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.APIKey) == 0 {
+		return ErrAPIKeyNotSet
+	}
+	if len(cfg.APISecret) == 0 {
+		return ErrAPISecretNotSet
+	}
+	if len(cfg.From) == 0 {
+		return ErrFromNotSet
+	}
+	if len(cfg.To) == 0 {
+		return ErrToNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.APIKey) > 0 {
+		cfg.APIKey = override.APIKey
+	}
+	if len(override.APISecret) > 0 {
+		cfg.APISecret = override.APISecret
+	}
+	if len(override.From) > 0 {
+		cfg.From = override.From
+	}
+	if len(override.To) > 0 {
+		cfg.To = override.To
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Vonage
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	message := provider.buildMessage(cfg, ep, alert, result, resolved)
+
+	// Send SMS to each recipient
+	for _, recipient := range cfg.To {
+		if err := provider.sendSMS(cfg, recipient, message); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// sendSMS sends an individual SMS message
+func (provider *AlertProvider) sendSMS(cfg *Config, to, message string) error {
+	data := url.Values{}
+	data.Set("api_key", cfg.APIKey)
+	data.Set("api_secret", cfg.APISecret)
+	data.Set("from", cfg.From)
+	data.Set("to", to)
+	data.Set("text", message)
+	request, err := http.NewRequest(http.MethodPost, ApiURL, strings.NewReader(data.Encode()))
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	// Read response body once and use it for both error handling and JSON processing
+	body, err := io.ReadAll(response.Body)
+	if err != nil {
+		return err
+	}
+	if response.StatusCode >= 400 {
+		return fmt.Errorf("call to vonage alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	// Check response for errors in messages array
+	var vonageResponse Response
+	if err := json.Unmarshal(body, &vonageResponse); err != nil {
+		return err
+	}
+	// Check if any message failed
+	for _, msg := range vonageResponse.Messages {
+		if msg.Status != "0" {
+			return fmt.Errorf("vonage SMS failed with status %s: %s", msg.Status, msg.ErrorText)
+		}
+	}
+	return nil
+}
+
+type Response struct {
+	MessageCount string    `json:"message-count"`
+	Messages     []Message `json:"messages"`
+}
+
+type Message struct {
+	To               string `json:"to"`
+	MessageID        string `json:"message-id"`
+	Status           string `json:"status"`
+	ErrorText        string `json:"error-text"`
+	RemainingBalance string `json:"remaining-balance"`
+	MessagePrice     string `json:"message-price"`
+	Network          string `json:"network"`
+}
+
+// buildMessage builds the SMS message content
+func (provider *AlertProvider) buildMessage(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) string {
+	if resolved {
+		return fmt.Sprintf("RESOLVED: %s - %s", ep.DisplayName(), alert.GetDescription())
+	} else {
+		return fmt.Sprintf("TRIGGERED: %s - %s", ep.DisplayName(), alert.GetDescription())
+	}
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/vonage/vonage_test.go

@@ -0,0 +1,546 @@
+package vonage
+
+import (
+	"io"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestVonageAlertProvider_IsValid(t *testing.T) {
+	invalidProvider := AlertProvider{}
+	if err := invalidProvider.Validate(); err == nil {
+		t.Error("provider shouldn't have been valid")
+	}
+	validProvider := AlertProvider{
+		DefaultConfig: Config{
+			APIKey:    "test-key",
+			APISecret: "test-secret",
+			From:      "Gatus",
+			To:        []string{"+1234567890"},
+		},
+	}
+	if err := validProvider.Validate(); err != nil {
+		t.Error("provider should've been valid")
+	}
+}
+
+func TestVonageAlertProvider_IsValidWithOverride(t *testing.T) {
+	validProvider := AlertProvider{
+		DefaultConfig: Config{
+			APIKey:    "test-key",
+			APISecret: "test-secret",
+			From:      "Gatus",
+			To:        []string{"+1234567890"},
+		},
+		Overrides: []Override{
+			{
+				Group: "test-group",
+				Config: Config{
+					APIKey:    "override-key",
+					APISecret: "override-secret",
+					From:      "Override",
+					To:        []string{"+9876543210"},
+				},
+			},
+		},
+	}
+	if err := validProvider.Validate(); err != nil {
+		t.Error("provider should've been valid")
+	}
+}
+
+func TestVonageAlertProvider_IsNotValidWithInvalidOverrideGroup(t *testing.T) {
+	invalidProvider := AlertProvider{
+		DefaultConfig: Config{
+			APIKey:    "test-key",
+			APISecret: "test-secret",
+			From:      "Gatus",
+			To:        []string{"+1234567890"},
+		},
+		Overrides: []Override{
+			{
+				Group: "",
+				Config: Config{
+					APIKey:    "override-key",
+					APISecret: "override-secret",
+					From:      "Override",
+					To:        []string{"+9876543210"},
+				},
+			},
+		},
+	}
+	if err := invalidProvider.Validate(); err == nil {
+		t.Error("provider shouldn't have been valid")
+	}
+}
+
+func TestVonageAlertProvider_IsNotValidWithDuplicateOverrideGroup(t *testing.T) {
+	invalidProvider := AlertProvider{
+		DefaultConfig: Config{
+			APIKey:    "test-key",
+			APISecret: "test-secret",
+			From:      "Gatus",
+			To:        []string{"+1234567890"},
+		},
+		Overrides: []Override{
+			{
+				Group: "test-group",
+				Config: Config{
+					APIKey:    "override-key1",
+					APISecret: "override-secret1",
+					From:      "Override1",
+					To:        []string{"+9876543210"},
+				},
+			},
+			{
+				Group: "test-group",
+				Config: Config{
+					APIKey:    "override-key2",
+					APISecret: "override-secret2",
+					From:      "Override2",
+					To:        []string{"+1234567890"},
+				},
+			},
+		},
+	}
+	if err := invalidProvider.Validate(); err == nil {
+		t.Error("provider shouldn't have been valid")
+	}
+}
+
+func TestVonageAlertProvider_IsValidWithInvalidFrom(t *testing.T) {
+	invalidProvider := AlertProvider{
+		DefaultConfig: Config{
+			APIKey:    "test-key",
+			APISecret: "test-secret",
+			From:      "",
+			To:        []string{"+1234567890"},
+		},
+	}
+	if err := invalidProvider.Validate(); err == nil {
+		t.Error("provider shouldn't have been valid")
+	}
+}
+
+func TestVonageAlertProvider_IsValidWithInvalidTo(t *testing.T) {
+	invalidProvider := AlertProvider{
+		DefaultConfig: Config{
+			APIKey:    "test-key",
+			APISecret: "test-secret",
+			From:      "Gatus",
+			To:        []string{},
+		},
+	}
+	if err := invalidProvider.Validate(); err == nil {
+		t.Error("provider shouldn't have been valid")
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name             string
+		Provider         AlertProvider
+		Alert            alert.Alert
+		Resolved         bool
+		MockRoundTripper test.MockRoundTripper
+		ExpectedError    bool
+	}{
+		{
+			Name: "triggered",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+			},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(strings.NewReader(`{"message-count":"1","messages":[{"to":"+1234567890","message-id":"test-id","status":"0","remaining-balance":"10.50","message-price":"0.10","network":"12345"}]}`)),
+				}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name: "triggered-error-status-code",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+			},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+		{
+			Name: "triggered-error-vonage-response",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+			},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(strings.NewReader(`{"message-count":"1","messages":[{"to":"+1234567890","message-id":"","status":"2","error-text":"Missing from param"}]}`)),
+				}
+			}),
+			ExpectedError: true,
+		},
+		{
+			Name: "resolved",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+			},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(strings.NewReader(`{"message-count":"1","messages":[{"to":"+1234567890","message-id":"test-id","status":"0","remaining-balance":"10.40","message-price":"0.10","network":"12345"}]}`)),
+				}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name: "multiple-recipients",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890", "+0987654321"},
+				},
+			},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(strings.NewReader(`{"message-count":"1","messages":[{"to":"+1234567890","message-id":"test-id","status":"0","remaining-balance":"10.30","message-price":"0.10","network":"12345"}]}`)),
+				}
+			}),
+			ExpectedError: false,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
+			err := scenario.Provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if scenario.ExpectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.ExpectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_buildMessage(t *testing.T) {
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name            string
+		Provider        AlertProvider
+		Alert           alert.Alert
+		Resolved        bool
+		ExpectedMessage string
+	}{
+		{
+			Name: "triggered",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+			},
+			Alert:           alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        false,
+			ExpectedMessage: "TRIGGERED: endpoint-name - description-1",
+		},
+		{
+			Name: "resolved",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+			},
+			Alert:           alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:        true,
+			ExpectedMessage: "RESOLVED: endpoint-name - description-2",
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			message := scenario.Provider.buildMessage(
+				&scenario.Provider.DefaultConfig,
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if message != scenario.ExpectedMessage {
+				t.Errorf("expected %s, got %s", scenario.ExpectedMessage, message)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}
+
+func TestAlertProvider_GetConfig(t *testing.T) {
+	scenarios := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		InputAlert     alert.Alert
+		ExpectedOutput Config
+	}{
+		{
+			Name: "provider-no-override-should-default",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+			},
+			InputGroup: "",
+			InputAlert: alert.Alert{},
+			ExpectedOutput: Config{
+				APIKey:    "test-key",
+				APISecret: "test-secret",
+				From:      "Gatus",
+				To:        []string{"+1234567890"},
+			},
+		},
+		{
+			Name: "provider-with-group-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+				Overrides: []Override{
+					{
+						Group: "test-group",
+						Config: Config{
+							APIKey:    "group-override-key",
+							APISecret: "group-override-secret",
+							From:      "GroupOverride",
+							To:        []string{"+9876543210"},
+						},
+					},
+				},
+			},
+			InputGroup: "test-group",
+			InputAlert: alert.Alert{},
+			ExpectedOutput: Config{
+				APIKey:    "group-override-key",
+				APISecret: "group-override-secret",
+				From:      "GroupOverride",
+				To:        []string{"+9876543210"},
+			},
+		},
+		{
+			Name: "provider-with-group-override-partial",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+				Overrides: []Override{
+					{
+						Group: "test-group",
+						Config: Config{
+							To: []string{"+9876543210"},
+						},
+					},
+				},
+			},
+			InputGroup: "test-group",
+			InputAlert: alert.Alert{},
+			ExpectedOutput: Config{
+				APIKey:    "test-key",
+				APISecret: "test-secret",
+				From:      "Gatus",
+				To:        []string{"+9876543210"},
+			},
+		},
+		{
+			Name: "provider-with-alert-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+			},
+			InputGroup: "",
+			InputAlert: alert.Alert{ProviderOverride: map[string]any{
+				"api-key":    "override-key",
+				"api-secret": "override-secret",
+				"from":       "Override",
+				"to":         []string{"+9876543210"},
+			}},
+			ExpectedOutput: Config{
+				APIKey:    "override-key",
+				APISecret: "override-secret",
+				From:      "Override",
+				To:        []string{"+9876543210"},
+			},
+		},
+		{
+			Name: "provider-with-both-group-and-alert-override",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+				Overrides: []Override{
+					{
+						Group: "test-group",
+						Config: Config{
+							APIKey: "group-override-key",
+							From:   "GroupOverride",
+						},
+					},
+				},
+			},
+			InputGroup: "test-group",
+			InputAlert: alert.Alert{ProviderOverride: map[string]any{
+				"api-secret": "alert-override-secret",
+				"to":         []string{"+9876543210"},
+			}},
+			ExpectedOutput: Config{
+				APIKey:    "group-override-key",
+				APISecret: "alert-override-secret",
+				From:      "GroupOverride",
+				To:        []string{"+9876543210"},
+			},
+		},
+		{
+			Name: "provider-with-group-override-no-match",
+			Provider: AlertProvider{
+				DefaultConfig: Config{
+					APIKey:    "test-key",
+					APISecret: "test-secret",
+					From:      "Gatus",
+					To:        []string{"+1234567890"},
+				},
+				Overrides: []Override{
+					{
+						Group: "different-group",
+						Config: Config{
+							APIKey: "group-override-key",
+						},
+					},
+				},
+			},
+			InputGroup: "test-group",
+			InputAlert: alert.Alert{},
+			ExpectedOutput: Config{
+				APIKey:    "test-key",
+				APISecret: "test-secret",
+				From:      "Gatus",
+				To:        []string{"+1234567890"},
+			},
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			got, err := scenario.Provider.GetConfig(scenario.InputGroup, &scenario.InputAlert)
+			if err != nil {
+				t.Error("expected no error, got:", err.Error())
+			}
+			if got.APIKey != scenario.ExpectedOutput.APIKey {
+				t.Errorf("expected APIKey to be %s, got %s", scenario.ExpectedOutput.APIKey, got.APIKey)
+			}
+			if got.APISecret != scenario.ExpectedOutput.APISecret {
+				t.Errorf("expected APISecret to be %s, got %s", scenario.ExpectedOutput.APISecret, got.APISecret)
+			}
+			if got.From != scenario.ExpectedOutput.From {
+				t.Errorf("expected From to be %s, got %s", scenario.ExpectedOutput.From, got.From)
+			}
+			if len(got.To) != len(scenario.ExpectedOutput.To) {
+				t.Errorf("expected To to have length %d, got %d", len(scenario.ExpectedOutput.To), len(got.To))
+			} else {
+				for i, to := range got.To {
+					if to != scenario.ExpectedOutput.To[i] {
+						t.Errorf("expected To[%d] to be %s, got %s", i, scenario.ExpectedOutput.To[i], to)
+					}
+				}
+			}
+			// Test ValidateOverrides as well, since it really just calls GetConfig
+			if err = scenario.Provider.ValidateOverrides(scenario.InputGroup, &scenario.InputAlert); err != nil {
+				t.Errorf("unexpected error: %s", err)
+			}
+		})
+	}
+}
+

alerting/provider/webex/webex.go

@@ -0,0 +1,171 @@
+package webex
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrWebhookURLNotSet       = errors.New("webhook-url not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	WebhookURL string `yaml:"webhook-url"` // Webex Teams webhook URL
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.WebhookURL) == 0 {
+		return ErrWebhookURLNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.WebhookURL) > 0 {
+		cfg.WebhookURL = override.WebhookURL
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Webex
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	body, err := provider.buildRequestBody(ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	request, err := http.NewRequest(http.MethodPost, cfg.WebhookURL, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to webex alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type Body struct {
+	RoomID   string `json:"roomId,omitempty"`
+	Text     string `json:"text,omitempty"`
+	Markdown string `json:"markdown"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var message string
+	if resolved {
+		message = fmt.Sprintf("✅ **RESOLVED**: %s\n\nAlert has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+	} else {
+		message = fmt.Sprintf("🚨 **ALERT**: %s\n\nEndpoint has failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+	}
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		message += fmt.Sprintf("\n\n**Description**: %s", alertDescription)
+	}
+	if len(result.ConditionResults) > 0 {
+		message += "\n\n**Condition Results:**"
+		for _, conditionResult := range result.ConditionResults {
+			var status string
+			if conditionResult.Success {
+				status = "✅"
+			} else {
+				status = "❌"
+			}
+			message += fmt.Sprintf("\n- %s `%s`", status, conditionResult.Condition)
+		}
+	}
+	body := Body{
+		Markdown: message,
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/webex/webex_test.go

@@ -0,0 +1,134 @@
+package webex
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://webexapis.com/v1/webhooks/incoming/123"}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-webhook-url",
+			provider: AlertProvider{DefaultConfig: Config{}},
+			expected: ErrWebhookURLNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://webexapis.com/v1/webhooks/incoming/123"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["markdown"] == nil {
+					t.Error("expected 'markdown' field in request body")
+				}
+				markdown := body["markdown"].(string)
+				if !strings.Contains(markdown, "ALERT") {
+					t.Errorf("expected markdown to contain 'ALERT', got %s", markdown)
+				}
+				if !strings.Contains(markdown, "failed 3 time(s)") {
+					t.Errorf("expected markdown to contain failure count, got %s", markdown)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://webexapis.com/v1/webhooks/incoming/123"}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				markdown := body["markdown"].(string)
+				if !strings.Contains(markdown, "RESOLVED") {
+					t.Errorf("expected markdown to contain 'RESOLVED', got %s", markdown)
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://webexapis.com/v1/webhooks/incoming/123"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusUnauthorized, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

alerting/provider/zapier/zapier.go

@@ -0,0 +1,197 @@
+package zapier
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	ErrWebhookURLNotSet       = errors.New("webhook-url not set")
+	ErrDuplicateGroupOverride = errors.New("duplicate group override")
+)
+
+type Config struct {
+	WebhookURL string `yaml:"webhook-url"` // Zapier webhook URL
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.WebhookURL) == 0 {
+		return ErrWebhookURLNotSet
+	}
+	return nil
+}
+
+func (cfg *Config) Merge(override *Config) {
+	if len(override.WebhookURL) > 0 {
+		cfg.WebhookURL = override.WebhookURL
+	}
+}
+
+// AlertProvider is the configuration necessary for sending an alert using Zapier
+type AlertProvider struct {
+	DefaultConfig Config `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group  string `yaml:"group"`
+	Config `yaml:",inline"`
+}
+
+// Validate the provider's configuration
+func (provider *AlertProvider) Validate() error {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" {
+				return ErrDuplicateGroupOverride
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return provider.DefaultConfig.Validate()
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
+	cfg, err := provider.GetConfig(ep.Group, alert)
+	if err != nil {
+		return err
+	}
+	body, err := provider.buildRequestBody(ep, alert, result, resolved)
+	if err != nil {
+		return err
+	}
+	buffer := bytes.NewBuffer(body)
+	request, err := http.NewRequest(http.MethodPost, cfg.WebhookURL, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= 400 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to zapier alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return nil
+}
+
+type Body struct {
+	AlertType        string            `json:"alert_type"`
+	Status           string            `json:"status"`
+	Endpoint         string            `json:"endpoint"`
+	Group            string            `json:"group,omitempty"`
+	Message          string            `json:"message"`
+	Description      string            `json:"description,omitempty"`
+	Timestamp        string            `json:"timestamp"`
+	SuccessThreshold int               `json:"success_threshold,omitempty"`
+	FailureThreshold int               `json:"failure_threshold,omitempty"`
+	ConditionResults []*endpoint.ConditionResult `json:"condition_results,omitempty"`
+	TotalConditions  int               `json:"total_conditions"`
+	PassedConditions int               `json:"passed_conditions"`
+	FailedConditions int               `json:"failed_conditions"`
+}
+
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) ([]byte, error) {
+	var alertType, status, message string
+	var successThreshold, failureThreshold int
+	if resolved {
+		alertType = "resolved"
+		status = "ok"
+		message = fmt.Sprintf("Alert for %s has been resolved after passing successfully %d time(s) in a row", ep.DisplayName(), alert.SuccessThreshold)
+		successThreshold = alert.SuccessThreshold
+	} else {
+		alertType = "triggered"
+		status = "critical"
+		message = fmt.Sprintf("Alert for %s has been triggered due to having failed %d time(s) in a row", ep.DisplayName(), alert.FailureThreshold)
+		failureThreshold = alert.FailureThreshold
+	}
+	// Process condition results
+	passedConditions := 0
+	failedConditions := 0
+	for _, cr := range result.ConditionResults {
+		if cr.Success {
+			passedConditions++
+		} else {
+			failedConditions++
+		}
+	}
+	body := Body{
+		AlertType:        alertType,
+		Status:           status,
+		Endpoint:         ep.DisplayName(),
+		Group:            ep.Group,
+		Message:          message,
+		Description:      alert.GetDescription(),
+		Timestamp:        time.Now().Format(time.RFC3339),
+		SuccessThreshold: successThreshold,
+		FailureThreshold: failureThreshold,
+		ConditionResults: result.ConditionResults,
+		TotalConditions:  len(result.ConditionResults),
+		PassedConditions: passedConditions,
+		FailedConditions: failedConditions,
+	}
+	bodyAsJSON, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	return bodyAsJSON, nil
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}
+
+// GetConfig returns the configuration for the provider with the overrides applied
+func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
+	cfg := provider.DefaultConfig
+	// Handle group overrides
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				cfg.Merge(&override.Config)
+				break
+			}
+		}
+	}
+	// Handle alert overrides
+	if len(alert.ProviderOverride) != 0 {
+		overrideConfig := Config{}
+		if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
+			return nil, err
+		}
+		cfg.Merge(&overrideConfig)
+	}
+	// Validate the configuration
+	err := cfg.Validate()
+	return &cfg, err
+}
+
+// ValidateOverrides validates the alert's provider override and, if present, the group override
+func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
+	_, err := provider.GetConfig(group, alert)
+	return err
+}

alerting/provider/zapier/zapier_test.go

@@ -0,0 +1,162 @@
+package zapier
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/test"
+)
+
+func TestAlertProvider_Validate(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected error
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://hooks.zapier.com/hooks/catch/123456/abcdef/"}},
+			expected: nil,
+		},
+		{
+			name:     "invalid-webhook-url",
+			provider: AlertProvider{DefaultConfig: Config{}},
+			expected: ErrWebhookURLNotSet,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			err := scenario.provider.Validate()
+			if err != scenario.expected {
+				t.Errorf("expected %v, got %v", scenario.expected, err)
+			}
+		})
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		name             string
+		provider         AlertProvider
+		alert            alert.Alert
+		resolved         bool
+		mockRoundTripper test.MockRoundTripper
+		expectedError    bool
+	}{
+		{
+			name:     "triggered",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://hooks.zapier.com/hooks/catch/123456/abcdef/"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				if r.Host != "hooks.zapier.com" {
+					t.Errorf("expected host hooks.zapier.com, got %s", r.Host)
+				}
+				if r.URL.Path != "/hooks/catch/123456/abcdef/" {
+					t.Errorf("expected path /hooks/catch/123456/abcdef/, got %s", r.URL.Path)
+				}
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["alert_type"] != "triggered" {
+					t.Errorf("expected alert_type to be 'triggered', got %v", body["alert_type"])
+				}
+				if body["status"] != "critical" {
+					t.Errorf("expected status to be 'critical', got %v", body["status"])
+				}
+				if body["endpoint"] != "endpoint-name" {
+					t.Errorf("expected endpoint to be 'endpoint-name', got %v", body["endpoint"])
+				}
+				message := body["message"].(string)
+				if !strings.Contains(message, "Alert") {
+					t.Errorf("expected message to contain 'Alert', got %s", message)
+				}
+				if !strings.Contains(message, "failed 3 time(s)") {
+					t.Errorf("expected message to contain failure count, got %s", message)
+				}
+				if body["description"] != firstDescription {
+					t.Errorf("expected description to be '%s', got %v", firstDescription, body["description"])
+				}
+				conditionResults := body["condition_results"].([]interface{})
+				if len(conditionResults) != 2 {
+					t.Errorf("expected 2 condition results, got %d", len(conditionResults))
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "resolved",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://hooks.zapier.com/hooks/catch/123456/abcdef/"}},
+			alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: true,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				body := make(map[string]interface{})
+				json.NewDecoder(r.Body).Decode(&body)
+				if body["alert_type"] != "resolved" {
+					t.Errorf("expected alert_type to be 'resolved', got %v", body["alert_type"])
+				}
+				if body["status"] != "ok" {
+					t.Errorf("expected status to be 'ok', got %v", body["status"])
+				}
+				message := body["message"].(string)
+				if !strings.Contains(message, "resolved") {
+					t.Errorf("expected message to contain 'resolved', got %s", message)
+				}
+				if body["description"] != secondDescription {
+					t.Errorf("expected description to be '%s', got %v", secondDescription, body["description"])
+				}
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			expectedError: false,
+		},
+		{
+			name:     "error-response",
+			provider: AlertProvider{DefaultConfig: Config{WebhookURL: "https://hooks.zapier.com/hooks/catch/123456/abcdef/"}},
+			alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			resolved: false,
+			mockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusUnauthorized, Body: http.NoBody}
+			}),
+			expectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.mockRoundTripper})
+			err := scenario.provider.Send(
+				&endpoint.Endpoint{Name: "endpoint-name"},
+				&scenario.alert,
+				&endpoint.Result{
+					ConditionResults: []*endpoint.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.resolved},
+					},
+				},
+				scenario.resolved,
+			)
+			if scenario.expectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.expectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (&AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (&AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}

api/api.go

@@ -52,6 +52,7 @@ func (a *API) createRouter(cfg *config.Config) *fiber.App {
 		},
 		ReadBufferSize: cfg.Web.ReadBufferSize,
 		Network:        fiber.NetworkTCP,
+		Immutable:      true, // If not enabled, will cause issues due to fiber's zero allocation. See #1268 and https://docs.gofiber.io/#zero-allocation
 	})
 	if os.Getenv("ENVIRONMENT") == "dev" {
 		app.Use(cors.New(cors.Config{
@@ -75,7 +76,7 @@ func (a *API) createRouter(cfg *config.Config) *fiber.App {
 	// UNPROTECTED ROUTES //
 	////////////////////////
 	unprotectedAPIRouter := apiRouter.Group("/")
-	unprotectedAPIRouter.Get("/v1/config", ConfigHandler{securityConfig: cfg.Security}.GetConfig)
+	unprotectedAPIRouter.Get("/v1/config", ConfigHandler{securityConfig: cfg.Security, config: cfg}.GetConfig)
 	unprotectedAPIRouter.Get("/v1/endpoints/:key/health/badge.svg", HealthBadge)
 	unprotectedAPIRouter.Get("/v1/endpoints/:key/health/badge.shields", HealthBadgeShields)
 	unprotectedAPIRouter.Get("/v1/endpoints/:key/uptimes/:duration", UptimeRaw)
@@ -87,7 +88,8 @@ func (a *API) createRouter(cfg *config.Config) *fiber.App {
 	unprotectedAPIRouter.Post("/v1/endpoints/:key/external", CreateExternalEndpointResult(cfg))
 	// SPA
 	app.Get("/", SinglePageApplication(cfg.UI))
-	app.Get("/endpoints/:name", SinglePageApplication(cfg.UI))
+	app.Get("/endpoints/:key", SinglePageApplication(cfg.UI))
+	app.Get("/suites/:key", SinglePageApplication(cfg.UI))
 	// Health endpoint
 	healthHandler := health.Handler().WithJSON(true)
 	app.Get("/health", func(c *fiber.Ctx) error {
@@ -127,5 +129,7 @@ func (a *API) createRouter(cfg *config.Config) *fiber.App {
 	}
 	protectedAPIRouter.Get("/v1/endpoints/statuses", EndpointStatuses(cfg))
 	protectedAPIRouter.Get("/v1/endpoints/:key/statuses", EndpointStatus(cfg))
+	protectedAPIRouter.Get("/v1/suites/statuses", SuiteStatuses(cfg))
+	protectedAPIRouter.Get("/v1/suites/:key/statuses", SuiteStatus(cfg))
 	return app
 }

api/badge_test.go

@@ -34,8 +34,8 @@ func TestBadge(t *testing.T) {
 	cfg.Endpoints[0].UIConfig = ui.GetDefaultConfig()
 	cfg.Endpoints[1].UIConfig = ui.GetDefaultConfig()
 
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &endpoint.Result{Success: true, Connected: true, Duration: time.Millisecond, Timestamp: time.Now()})
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &endpoint.Result{Success: false, Connected: false, Duration: time.Second, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[0], &endpoint.Result{Success: true, Connected: true, Duration: time.Millisecond, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[1], &endpoint.Result{Success: false, Connected: false, Duration: time.Second, Timestamp: time.Now()})
 	api := New(cfg)
 	router := api.Router()
 	type Scenario struct {
@@ -284,8 +284,8 @@ func TestGetBadgeColorFromResponseTime(t *testing.T) {
 		},
 	}
 
-	store.Get().Insert(&firstTestEndpoint, &testSuccessfulResult)
-	store.Get().Insert(&secondTestEndpoint, &testSuccessfulResult)
+	store.Get().InsertEndpointResult(&firstTestEndpoint, &testSuccessfulResult)
+	store.Get().InsertEndpointResult(&secondTestEndpoint, &testSuccessfulResult)
 
 	scenarios := []struct {
 		Key           string

api/chart_test.go

@@ -28,8 +28,8 @@ func TestResponseTimeChart(t *testing.T) {
 			},
 		},
 	}
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &endpoint.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &endpoint.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[0], &endpoint.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[1], &endpoint.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
 	api := New(cfg)
 	router := api.Router()
 	type Scenario struct {

api/config.go

@@ -1,14 +1,17 @@
 package api
 
 import (
+	"encoding/json"
 	"fmt"
 
+	"github.com/TwiN/gatus/v5/config"
 	"github.com/TwiN/gatus/v5/security"
 	"github.com/gofiber/fiber/v2"
 )
 
 type ConfigHandler struct {
 	securityConfig *security.Config
+	config         *config.Config
 }
 
 func (handler ConfigHandler) GetConfig(c *fiber.Ctx) error {
@@ -18,8 +21,24 @@ func (handler ConfigHandler) GetConfig(c *fiber.Ctx) error {
 		hasOIDC = handler.securityConfig.OIDC != nil
 		isAuthenticated = handler.securityConfig.IsAuthenticated(c)
 	}
-	// Return the config
+
+	// Prepare response with announcements
+	response := map[string]interface{}{
+		"oidc":          hasOIDC,
+		"authenticated": isAuthenticated,
+	}
+	// Add announcements if available, otherwise use empty slice
+	if handler.config != nil && handler.config.Announcements != nil && len(handler.config.Announcements) > 0 {
+		response["announcements"] = handler.config.Announcements
+	} else {
+		response["announcements"] = []interface{}{}
+	}
+
+	// Return the config as JSON
 	c.Set("Content-Type", "application/json")
-	return c.Status(200).
-		SendString(fmt.Sprintf(`{"oidc":%v,"authenticated":%v}`, hasOIDC, isAuthenticated))
+	responseBytes, err := json.Marshal(response)
+	if err != nil {
+		return c.Status(500).SendString(fmt.Sprintf(`{"error":"Failed to marshal response: %s"}`, err.Error()))
+	}
+	return c.Status(200).Send(responseBytes)
 }

api/config_test.go

@@ -40,7 +40,7 @@ func TestConfigHandler_ServeHTTP(t *testing.T) {
 	if err != nil {
 		t.Error("expected err to be nil, but was", err)
 	}
-	if string(body) != `{"oidc":true,"authenticated":false}` {
-		t.Error("expected body to be `{\"oidc\":true,\"authenticated\":false}`, but was", string(body))
+	if string(body) != `{"announcements":[],"authenticated":false,"oidc":true}` {
+		t.Error("expected body to be `{\"announcements\":[],\"authenticated\":false,\"oidc\":true}`, but was", string(body))
 	}
 }

api/endpoint_status_test.go

@@ -101,8 +101,8 @@ func TestEndpointStatus(t *testing.T) {
 			MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
 		},
 	}
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &endpoint.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &endpoint.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[0], &endpoint.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[1], &endpoint.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
 	api := New(cfg)
 	router := api.Router()
 	type Scenario struct {
@@ -156,8 +156,8 @@ func TestEndpointStatuses(t *testing.T) {
 	defer cache.Clear()
 	firstResult := &testSuccessfulResult
 	secondResult := &testUnsuccessfulResult
-	store.Get().Insert(&testEndpoint, firstResult)
-	store.Get().Insert(&testEndpoint, secondResult)
+	store.Get().InsertEndpointResult(&testEndpoint, firstResult)
+	store.Get().InsertEndpointResult(&testEndpoint, secondResult)
 	// Can't be bothered dealing with timezone issues on the worker that runs the automated tests
 	firstResult.Timestamp = time.Time{}
 	secondResult.Timestamp = time.Time{}

api/external_endpoint.go

@@ -16,6 +16,7 @@ import (
 )
 
 func CreateExternalEndpointResult(cfg *config.Config) fiber.Handler {
+	extraLabels := cfg.GetUniqueExtraMetricLabels()
 	return func(c *fiber.Ctx) error {
 		// Check if the success query parameter is present
 		success, exists := c.Queries()["success"]
@@ -55,11 +56,11 @@ func CreateExternalEndpointResult(cfg *config.Config) fiber.Handler {
 			}
 			result.Duration = parsedDuration
 		}
-		if !result.Success && c.Query("error") != "" {
-			result.Errors = append(result.Errors, c.Query("error"))
+		if errorFromQuery := c.Query("error"); !result.Success && len(errorFromQuery) > 0 {
+			result.AddError(errorFromQuery)
 		}
 		convertedEndpoint := externalEndpoint.ToEndpoint()
-		if err := store.Get().Insert(convertedEndpoint, result); err != nil {
+		if err := store.Get().InsertEndpointResult(convertedEndpoint, result); err != nil {
 			if errors.Is(err, common.ErrEndpointNotFound) {
 				return c.Status(404).SendString(err.Error())
 			}
@@ -74,7 +75,7 @@ func CreateExternalEndpointResult(cfg *config.Config) fiber.Handler {
 			externalEndpoint.NumberOfFailuresInARow = convertedEndpoint.NumberOfFailuresInARow
 		}
 		if cfg.Metrics {
-			metrics.PublishMetricsForEndpoint(convertedEndpoint, result)
+			metrics.PublishMetricsForEndpoint(convertedEndpoint, result, extraLabels)
 		}
 		// Return the result
 		return c.Status(200).SendString("")

api/raw_test.go

@@ -33,8 +33,8 @@ func TestRawDataEndpoint(t *testing.T) {
 	cfg.Endpoints[0].UIConfig = ui.GetDefaultConfig()
 	cfg.Endpoints[1].UIConfig = ui.GetDefaultConfig()
 
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &endpoint.Result{Success: true, Connected: true, Duration: time.Millisecond, Timestamp: time.Now()})
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &endpoint.Result{Success: false, Connected: false, Duration: time.Second, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[0], &endpoint.Result{Success: true, Connected: true, Duration: time.Millisecond, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[1], &endpoint.Result{Success: false, Connected: false, Duration: time.Second, Timestamp: time.Now()})
 	api := New(cfg)
 	router := api.Router()
 	type Scenario struct {

api/spa_test.go

@@ -34,8 +34,8 @@ func TestSinglePageApplication(t *testing.T) {
 			Title: "example-title",
 		},
 	}
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &endpoint.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &endpoint.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[0], &endpoint.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatus(cfg.Endpoints[1], &endpoint.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
 	api := New(cfg)
 	router := api.Router()
 	type Scenario struct {

api/suite_status.go

@@ -0,0 +1,59 @@
+package api
+
+import (
+	"fmt"
+
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/config/suite"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/storage/store/common/paging"
+	"github.com/gofiber/fiber/v2"
+)
+
+// SuiteStatuses handles requests to retrieve all suite statuses
+func SuiteStatuses(cfg *config.Config) fiber.Handler {
+	return func(c *fiber.Ctx) error {
+		page, pageSize := extractPageAndPageSizeFromRequest(c, 100)
+		params := paging.NewSuiteStatusParams().WithPagination(page, pageSize)
+		suiteStatuses, err := store.Get().GetAllSuiteStatuses(params)
+		if err != nil {
+			return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
+				"error": fmt.Sprintf("Failed to retrieve suite statuses: %v", err),
+			})
+		}
+		// If no statuses exist yet, create empty ones from config
+		if len(suiteStatuses) == 0 {
+			for _, s := range cfg.Suites {
+				if s.IsEnabled() {
+					suiteStatuses = append(suiteStatuses, suite.NewStatus(s))
+				}
+			}
+		}
+		return c.Status(fiber.StatusOK).JSON(suiteStatuses)
+	}
+}
+
+// SuiteStatus handles requests to retrieve a single suite's status
+func SuiteStatus(cfg *config.Config) fiber.Handler {
+	return func(c *fiber.Ctx) error {
+		page, pageSize := extractPageAndPageSizeFromRequest(c, 100)
+		key := c.Params("key")
+		params := paging.NewSuiteStatusParams().WithPagination(page, pageSize)
+		status, err := store.Get().GetSuiteStatusByKey(key, params)
+		if err != nil || status == nil {
+			// Try to find the suite in config
+			for _, s := range cfg.Suites {
+				if s.Key() == key {
+					status = suite.NewStatus(s)
+					break
+				}
+			}
+			if status == nil {
+				return c.Status(404).JSON(fiber.Map{
+					"error": fmt.Sprintf("Suite with key '%s' not found", key),
+				})
+			}
+		}
+		return c.Status(fiber.StatusOK).JSON(status)
+	}
+}

api/suite_status_test.go

@@ -0,0 +1,519 @@
+package api
+
+import (
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/TwiN/gatus/v5/config"
+	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/config/suite"
+	"github.com/TwiN/gatus/v5/storage"
+	"github.com/TwiN/gatus/v5/storage/store"
+	"github.com/TwiN/gatus/v5/watchdog"
+)
+
+var (
+	suiteTimestamp = time.Now()
+
+	testSuiteEndpoint1 = endpoint.Endpoint{
+		Name:                    "endpoint1",
+		Group:                   "suite-group",
+		URL:                     "https://example.org/endpoint1",
+		Method:                  "GET",
+		Interval:                30 * time.Second,
+		Conditions:              []endpoint.Condition{endpoint.Condition("[STATUS] == 200"), endpoint.Condition("[RESPONSE_TIME] < 500")},
+		NumberOfFailuresInARow:  0,
+		NumberOfSuccessesInARow: 0,
+	}
+	testSuiteEndpoint2 = endpoint.Endpoint{
+		Name:                    "endpoint2",
+		Group:                   "suite-group",
+		URL:                     "https://example.org/endpoint2",
+		Method:                  "GET",
+		Interval:                30 * time.Second,
+		Conditions:              []endpoint.Condition{endpoint.Condition("[STATUS] == 200"), endpoint.Condition("[RESPONSE_TIME] < 300")},
+		NumberOfFailuresInARow:  0,
+		NumberOfSuccessesInARow: 0,
+	}
+	testSuite = suite.Suite{
+		Name:     "test-suite",
+		Group:    "suite-group",
+		Interval: 60 * time.Second,
+		Endpoints: []*endpoint.Endpoint{
+			&testSuiteEndpoint1,
+			&testSuiteEndpoint2,
+		},
+	}
+	testSuccessfulSuiteResult = suite.Result{
+		Name:      "test-suite",
+		Group:     "suite-group",
+		Success:   true,
+		Timestamp: suiteTimestamp,
+		Duration:  250 * time.Millisecond,
+		EndpointResults: []*endpoint.Result{
+			{
+				Hostname:   "example.org",
+				IP:         "127.0.0.1",
+				HTTPStatus: 200,
+				Success:    true,
+				Timestamp:  suiteTimestamp,
+				Duration:   100 * time.Millisecond,
+				ConditionResults: []*endpoint.ConditionResult{
+					{
+						Condition: "[STATUS] == 200",
+						Success:   true,
+					},
+					{
+						Condition: "[RESPONSE_TIME] < 500",
+						Success:   true,
+					},
+				},
+			},
+			{
+				Hostname:   "example.org",
+				IP:         "127.0.0.1",
+				HTTPStatus: 200,
+				Success:    true,
+				Timestamp:  suiteTimestamp,
+				Duration:   150 * time.Millisecond,
+				ConditionResults: []*endpoint.ConditionResult{
+					{
+						Condition: "[STATUS] == 200",
+						Success:   true,
+					},
+					{
+						Condition: "[RESPONSE_TIME] < 300",
+						Success:   true,
+					},
+				},
+			},
+		},
+	}
+	testUnsuccessfulSuiteResult = suite.Result{
+		Name:      "test-suite",
+		Group:     "suite-group",
+		Success:   false,
+		Timestamp: suiteTimestamp,
+		Duration:  850 * time.Millisecond,
+		Errors:    []string{"suite-error-1", "suite-error-2"},
+		EndpointResults: []*endpoint.Result{
+			{
+				Hostname:   "example.org",
+				IP:         "127.0.0.1",
+				HTTPStatus: 200,
+				Success:    true,
+				Timestamp:  suiteTimestamp,
+				Duration:   100 * time.Millisecond,
+				ConditionResults: []*endpoint.ConditionResult{
+					{
+						Condition: "[STATUS] == 200",
+						Success:   true,
+					},
+					{
+						Condition: "[RESPONSE_TIME] < 500",
+						Success:   true,
+					},
+				},
+			},
+			{
+				Hostname:   "example.org",
+				IP:         "127.0.0.1",
+				HTTPStatus: 500,
+				Errors:     []string{"endpoint-error-1"},
+				Success:    false,
+				Timestamp:  suiteTimestamp,
+				Duration:   750 * time.Millisecond,
+				ConditionResults: []*endpoint.ConditionResult{
+					{
+						Condition: "[STATUS] == 200",
+						Success:   false,
+					},
+					{
+						Condition: "[RESPONSE_TIME] < 300",
+						Success:   false,
+					},
+				},
+			},
+		},
+	}
+)
+
+func TestSuiteStatus(t *testing.T) {
+	defer store.Get().Clear()
+	defer cache.Clear()
+	cfg := &config.Config{
+		Metrics: true,
+		Suites: []*suite.Suite{
+			{
+				Name:  "frontend-suite",
+				Group: "core",
+			},
+			{
+				Name:  "backend-suite",
+				Group: "core",
+			},
+		},
+		Storage: &storage.Config{
+			MaximumNumberOfResults: storage.DefaultMaximumNumberOfResults,
+			MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
+		},
+	}
+	watchdog.UpdateSuiteStatus(cfg.Suites[0], &suite.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now(), Name: cfg.Suites[0].Name, Group: cfg.Suites[0].Group})
+	watchdog.UpdateSuiteStatus(cfg.Suites[1], &suite.Result{Success: false, Duration: time.Second, Timestamp: time.Now(), Name: cfg.Suites[1].Name, Group: cfg.Suites[1].Group})
+	api := New(cfg)
+	router := api.Router()
+	type Scenario struct {
+		Name         string
+		Path         string
+		ExpectedCode int
+		Gzip         bool
+	}
+	scenarios := []Scenario{
+		{
+			Name:         "suite-status",
+			Path:         "/api/v1/suites/core_frontend-suite/statuses",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "suite-status-gzip",
+			Path:         "/api/v1/suites/core_frontend-suite/statuses",
+			ExpectedCode: http.StatusOK,
+			Gzip:         true,
+		},
+		{
+			Name:         "suite-status-pagination",
+			Path:         "/api/v1/suites/core_frontend-suite/statuses?page=1&pageSize=20",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "suite-status-for-invalid-key",
+			Path:         "/api/v1/suites/invalid_key/statuses",
+			ExpectedCode: http.StatusNotFound,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			request := httptest.NewRequest("GET", scenario.Path, http.NoBody)
+			if scenario.Gzip {
+				request.Header.Set("Accept-Encoding", "gzip")
+			}
+			response, err := router.Test(request)
+			if err != nil {
+				return
+			}
+			if response.StatusCode != scenario.ExpectedCode {
+				t.Errorf("%s %s should have returned %d, but returned %d instead", request.Method, request.URL, scenario.ExpectedCode, response.StatusCode)
+			}
+		})
+	}
+}
+
+func TestSuiteStatus_SuiteNotInStoreButInConfig(t *testing.T) {
+	defer store.Get().Clear()
+	defer cache.Clear()
+	tests := []struct {
+		name         string
+		suiteKey     string
+		cfg          *config.Config
+		expectedCode int
+		expectJSON   bool
+		expectError  string
+	}{
+		{
+			name:     "suite-not-in-store-but-exists-in-config-enabled",
+			suiteKey: "test-group_test-suite",
+			cfg: &config.Config{
+				Metrics: true,
+				Suites: []*suite.Suite{
+					{
+						Name:    "test-suite",
+						Group:   "test-group",
+						Enabled: boolPtr(true),
+						Endpoints: []*endpoint.Endpoint{
+							{
+								Name:  "endpoint-1",
+								Group: "test-group",
+								URL:   "https://example.com",
+							},
+						},
+					},
+				},
+				Storage: &storage.Config{
+					MaximumNumberOfResults: storage.DefaultMaximumNumberOfResults,
+					MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
+				},
+			},
+			expectedCode: http.StatusOK,
+			expectJSON:   true,
+		},
+		{
+			name:     "suite-not-in-store-but-exists-in-config-disabled",
+			suiteKey: "test-group_disabled-suite",
+			cfg: &config.Config{
+				Metrics: true,
+				Suites: []*suite.Suite{
+					{
+						Name:    "disabled-suite",
+						Group:   "test-group",
+						Enabled: boolPtr(false),
+					},
+				},
+				Storage: &storage.Config{
+					MaximumNumberOfResults: storage.DefaultMaximumNumberOfResults,
+					MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
+				},
+			},
+			expectedCode: http.StatusOK,
+			expectJSON:   true,
+		},
+		{
+			name:     "suite-not-in-store-and-not-in-config",
+			suiteKey: "nonexistent_suite",
+			cfg: &config.Config{
+				Metrics: true,
+				Suites: []*suite.Suite{
+					{
+						Name:  "different-suite",
+						Group: "different-group",
+					},
+				},
+				Storage: &storage.Config{
+					MaximumNumberOfResults: storage.DefaultMaximumNumberOfResults,
+					MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
+				},
+			},
+			expectedCode: http.StatusNotFound,
+			expectError:  "Suite with key 'nonexistent_suite' not found",
+		},
+		{
+			name:     "suite-with-empty-group-in-config",
+			suiteKey: "_empty-group-suite",
+			cfg: &config.Config{
+				Metrics: true,
+				Suites: []*suite.Suite{
+					{
+						Name:  "empty-group-suite",
+						Group: "",
+					},
+				},
+				Storage: &storage.Config{
+					MaximumNumberOfResults: storage.DefaultMaximumNumberOfResults,
+					MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
+				},
+			},
+			expectedCode: http.StatusOK,
+			expectJSON:   true,
+		},
+		{
+			name:     "suite-nil-enabled-defaults-to-true",
+			suiteKey: "default_enabled-suite",
+			cfg: &config.Config{
+				Metrics: true,
+				Suites: []*suite.Suite{
+					{
+						Name:    "enabled-suite",
+						Group:   "default",
+						Enabled: nil,
+					},
+				},
+				Storage: &storage.Config{
+					MaximumNumberOfResults: storage.DefaultMaximumNumberOfResults,
+					MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
+				},
+			},
+			expectedCode: http.StatusOK,
+			expectJSON:   true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			api := New(tt.cfg)
+			router := api.Router()
+			request := httptest.NewRequest("GET", "/api/v1/suites/"+tt.suiteKey+"/statuses", http.NoBody)
+			response, err := router.Test(request)
+			if err != nil {
+				t.Fatalf("Router test failed: %v", err)
+			}
+			defer response.Body.Close()
+			if response.StatusCode != tt.expectedCode {
+				t.Errorf("Expected status code %d, got %d", tt.expectedCode, response.StatusCode)
+			}
+			body, err := io.ReadAll(response.Body)
+			if err != nil {
+				t.Fatalf("Failed to read response body: %v", err)
+			}
+			bodyStr := string(body)
+			if tt.expectJSON {
+				if response.Header.Get("Content-Type") != "application/json" {
+					t.Errorf("Expected JSON content type, got %s", response.Header.Get("Content-Type"))
+				}
+				if len(bodyStr) == 0 || bodyStr[0] != '{' {
+					t.Errorf("Expected JSON response, got: %s", bodyStr)
+				}
+			}
+			if tt.expectError != "" {
+				if !contains(bodyStr, tt.expectError) {
+					t.Errorf("Expected error message '%s' in response, got: %s", tt.expectError, bodyStr)
+				}
+			}
+		})
+	}
+}
+
+func TestSuiteStatuses(t *testing.T) {
+	defer store.Get().Clear()
+	defer cache.Clear()
+	firstResult := &testSuccessfulSuiteResult
+	secondResult := &testUnsuccessfulSuiteResult
+	store.Get().InsertSuiteResult(&testSuite, firstResult)
+	store.Get().InsertSuiteResult(&testSuite, secondResult)
+	// Can't be bothered dealing with timezone issues on the worker that runs the automated tests
+	firstResult.Timestamp = time.Time{}
+	secondResult.Timestamp = time.Time{}
+	for i := range firstResult.EndpointResults {
+		firstResult.EndpointResults[i].Timestamp = time.Time{}
+	}
+	for i := range secondResult.EndpointResults {
+		secondResult.EndpointResults[i].Timestamp = time.Time{}
+	}
+	api := New(&config.Config{
+		Metrics: true,
+		Storage: &storage.Config{
+			MaximumNumberOfResults: storage.DefaultMaximumNumberOfResults,
+			MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
+		},
+	})
+	router := api.Router()
+	type Scenario struct {
+		Name         string
+		Path         string
+		ExpectedCode int
+		ExpectedBody string
+	}
+	scenarios := []Scenario{
+		{
+			Name:         "no-pagination",
+			Path:         "/api/v1/suites/statuses",
+			ExpectedCode: http.StatusOK,
+			ExpectedBody: `[{"name":"test-suite","group":"suite-group","key":"suite-group_test-suite","results":[{"name":"test-suite","group":"suite-group","success":true,"timestamp":"0001-01-01T00:00:00Z","duration":250000000,"endpointResults":[{"status":200,"hostname":"example.org","duration":100000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"},{"status":200,"hostname":"example.org","duration":150000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 300","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"}]},{"name":"test-suite","group":"suite-group","success":false,"timestamp":"0001-01-01T00:00:00Z","duration":850000000,"endpointResults":[{"status":200,"hostname":"example.org","duration":100000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"},{"status":500,"hostname":"example.org","duration":750000000,"errors":["endpoint-error-1"],"conditionResults":[{"condition":"[STATUS] == 200","success":false},{"condition":"[RESPONSE_TIME] \u003c 300","success":false}],"success":false,"timestamp":"0001-01-01T00:00:00Z"}],"errors":["suite-error-1","suite-error-2"]}]}]`,
+		},
+		{
+			Name:         "pagination-first-result",
+			Path:         "/api/v1/suites/statuses?page=1&pageSize=1",
+			ExpectedCode: http.StatusOK,
+			ExpectedBody: `[{"name":"test-suite","group":"suite-group","key":"suite-group_test-suite","results":[{"name":"test-suite","group":"suite-group","success":false,"timestamp":"0001-01-01T00:00:00Z","duration":850000000,"endpointResults":[{"status":200,"hostname":"example.org","duration":100000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"},{"status":500,"hostname":"example.org","duration":750000000,"errors":["endpoint-error-1"],"conditionResults":[{"condition":"[STATUS] == 200","success":false},{"condition":"[RESPONSE_TIME] \u003c 300","success":false}],"success":false,"timestamp":"0001-01-01T00:00:00Z"}],"errors":["suite-error-1","suite-error-2"]}]}]`,
+		},
+		{
+			Name:         "pagination-second-result",
+			Path:         "/api/v1/suites/statuses?page=2&pageSize=1",
+			ExpectedCode: http.StatusOK,
+			ExpectedBody: `[{"name":"test-suite","group":"suite-group","key":"suite-group_test-suite","results":[{"name":"test-suite","group":"suite-group","success":true,"timestamp":"0001-01-01T00:00:00Z","duration":250000000,"endpointResults":[{"status":200,"hostname":"example.org","duration":100000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"},{"status":200,"hostname":"example.org","duration":150000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 300","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"}]}]}]`,
+		},
+		{
+			Name:         "pagination-no-results",
+			Path:         "/api/v1/suites/statuses?page=5&pageSize=20",
+			ExpectedCode: http.StatusOK,
+			ExpectedBody: `[{"name":"test-suite","group":"suite-group","key":"suite-group_test-suite","results":[]}]`,
+		},
+		{
+			Name:         "invalid-pagination-should-fall-back-to-default",
+			Path:         "/api/v1/suites/statuses?page=INVALID&pageSize=INVALID",
+			ExpectedCode: http.StatusOK,
+			ExpectedBody: `[{"name":"test-suite","group":"suite-group","key":"suite-group_test-suite","results":[{"name":"test-suite","group":"suite-group","success":true,"timestamp":"0001-01-01T00:00:00Z","duration":250000000,"endpointResults":[{"status":200,"hostname":"example.org","duration":100000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"},{"status":200,"hostname":"example.org","duration":150000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 300","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"}]},{"name":"test-suite","group":"suite-group","success":false,"timestamp":"0001-01-01T00:00:00Z","duration":850000000,"endpointResults":[{"status":200,"hostname":"example.org","duration":100000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"},{"status":500,"hostname":"example.org","duration":750000000,"errors":["endpoint-error-1"],"conditionResults":[{"condition":"[STATUS] == 200","success":false},{"condition":"[RESPONSE_TIME] \u003c 300","success":false}],"success":false,"timestamp":"0001-01-01T00:00:00Z"}],"errors":["suite-error-1","suite-error-2"]}]}]`,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			request := httptest.NewRequest("GET", scenario.Path, http.NoBody)
+			response, err := router.Test(request)
+			if err != nil {
+				return
+			}
+			defer response.Body.Close()
+			if response.StatusCode != scenario.ExpectedCode {
+				t.Errorf("%s %s should have returned %d, but returned %d instead", request.Method, request.URL, scenario.ExpectedCode, response.StatusCode)
+			}
+			body, err := io.ReadAll(response.Body)
+			if err != nil {
+				t.Error("expected err to be nil, but was", err)
+			}
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected:\n %s\n\ngot:\n %s", scenario.ExpectedBody, string(body))
+			}
+		})
+	}
+}
+
+func TestSuiteStatuses_NoSuitesInStoreButExistInConfig(t *testing.T) {
+	defer store.Get().Clear()
+	defer cache.Clear()
+	cfg := &config.Config{
+		Metrics: true,
+		Suites: []*suite.Suite{
+			{
+				Name:    "config-only-suite-1",
+				Group:   "test-group",
+				Enabled: boolPtr(true),
+			},
+			{
+				Name:    "config-only-suite-2",
+				Group:   "test-group",
+				Enabled: boolPtr(true),
+			},
+			{
+				Name:    "disabled-suite",
+				Group:   "test-group",
+				Enabled: boolPtr(false),
+			},
+		},
+		Storage: &storage.Config{
+			MaximumNumberOfResults: storage.DefaultMaximumNumberOfResults,
+			MaximumNumberOfEvents:  storage.DefaultMaximumNumberOfEvents,
+		},
+	}
+	api := New(cfg)
+	router := api.Router()
+	request := httptest.NewRequest("GET", "/api/v1/suites/statuses", http.NoBody)
+	response, err := router.Test(request)
+	if err != nil {
+		t.Fatalf("Router test failed: %v", err)
+	}
+	defer response.Body.Close()
+	if response.StatusCode != http.StatusOK {
+		t.Errorf("Expected status code %d, got %d", http.StatusOK, response.StatusCode)
+	}
+	body, err := io.ReadAll(response.Body)
+	if err != nil {
+		t.Fatalf("Failed to read response body: %v", err)
+	}
+	bodyStr := string(body)
+	if !contains(bodyStr, "config-only-suite-1") {
+		t.Error("Expected config-only-suite-1 in response")
+	}
+	if !contains(bodyStr, "config-only-suite-2") {
+		t.Error("Expected config-only-suite-2 in response")
+	}
+	if contains(bodyStr, "disabled-suite") {
+		t.Error("Should not include disabled-suite in response")
+	}
+}
+
+func boolPtr(b bool) *bool {
+	return &b
+}
+
+func contains(s, substr string) bool {
+	return len(s) >= len(substr) && (s == substr || len(substr) == 0 ||
+		(len(s) > len(substr) && (s[:len(substr)] == substr || s[len(s)-len(substr):] == substr ||
+			func() bool {
+				for i := 1; i <= len(s)-len(substr); i++ {
+					if s[i:i+len(substr)] == substr {
+						return true
+					}
+				}
+				return false
+			}())))
+}

api/util.go

@@ -10,8 +10,8 @@ const (
 	// DefaultPage is the default page to use if none is specified or an invalid value is provided
 	DefaultPage = 1
 
-	// DefaultPageSize is the default page siZE to use if none is specified or an invalid value is provided
-	DefaultPageSize = 20
+	// DefaultPageSize is the default page size to use if none is specified or an invalid value is provided
+	DefaultPageSize = 50
 )
 
 func extractPageAndPageSizeFromRequest(c *fiber.Ctx, maximumNumberOfResults int) (page, pageSize int) {

client/client.go

@@ -1,8 +1,10 @@
 package client
 
 import (
+	"context"
 	"crypto/tls"
 	"crypto/x509"
+	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -20,6 +22,8 @@ import (
 	"github.com/ishidawataru/sctp"
 	"github.com/miekg/dns"
 	ping "github.com/prometheus-community/pro-bing"
+	"github.com/registrobr/rdap"
+	"github.com/registrobr/rdap/protocol"
 	"golang.org/x/crypto/ssh"
 	"golang.org/x/net/websocket"
 )
@@ -34,6 +38,7 @@ var (
 
 	whoisClient              = whois.NewClient().WithReferralCache(true)
 	whoisExpirationDateCache = gocache.NewCache().WithMaxSize(10000).WithDefaultTTL(24 * time.Hour)
+	rdapClient               = rdap.NewClient(nil)
 )
 
 // GetHTTPClient returns the shared HTTP client, or the client from the configuration passed
@@ -61,7 +66,12 @@ func GetDomainExpiration(hostname string) (domainExpiration time.Duration, err e
 			return domainExpiration, nil
 		}
 	}
-	if whoisResponse, err := whoisClient.QueryAndParse(hostname); err != nil {
+	whoisResponse, err := rdapQuery(hostname)
+	if err != nil {
+		// fallback to WHOIS protocol
+		whoisResponse, err = whoisClient.QueryAndParse(hostname)
+	}
+	if err != nil {
 		if !retrievedCachedValue { // Add an error unless we already retrieved a cached value
 			return 0, fmt.Errorf("error querying and parsing hostname using whois client: %w", err)
 		}
@@ -141,10 +151,39 @@ func CanPerformStartTLS(address string, config *Config) (connected bool, certifi
 	if len(hostAndPort) != 2 {
 		return false, nil, errors.New("invalid address for starttls, format must be host:port")
 	}
-	connection, err := net.DialTimeout("tcp", address, config.Timeout)
-	if err != nil {
-		return
+
+	var connection net.Conn
+	var dnsResolver *DNSResolverConfig
+
+	if config.HasCustomDNSResolver() {
+		dnsResolver, err = config.parseDNSResolver()
+
+		if err != nil {
+			// We're ignoring the error, because it should have been validated on startup ValidateAndSetDefaults.
+			// It shouldn't happen, but if it does, we'll log it... Better safe than sorry ;)
+			logr.Errorf("[client.getHTTPClient] THIS SHOULD NOT HAPPEN. Silently ignoring invalid DNS resolver due to error: %s", err.Error())
+		} else {
+			dialer := &net.Dialer{
+				Resolver: &net.Resolver{
+					PreferGo: true,
+					Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
+						d := net.Dialer{}
+						return d.DialContext(ctx, dnsResolver.Protocol, dnsResolver.Host+":"+dnsResolver.Port)
+					},
+				},
+			}
+			connection, err = dialer.DialContext(context.Background(), "tcp", address)
+			if err != nil {
+				return
+			}
+		}
+	} else {
+		connection, err = net.DialTimeout("tcp", address, config.Timeout)
+		if err != nil {
+			return
+		}
 	}
+
 	smtpClient, err := smtp.NewClient(connection, hostAndPort[0])
 	if err != nil {
 		return
@@ -372,6 +411,17 @@ func QueryDNS(queryType, queryName, url string) (connected bool, dnsRcode string
 		url = fmt.Sprintf("%s:%d", url, dnsPort)
 	}
 	queryTypeAsUint16 := dns.StringToType[queryType]
+	// Special handling: if this is a PTR query and queryName looks like a plain IP,
+	// convert it to the proper reverse lookup domain automatically.
+	if queryTypeAsUint16 == dns.TypePTR &&
+		!strings.HasSuffix(queryName, ".in-addr.arpa.") &&
+		!strings.HasSuffix(queryName, ".ip6.arpa.") {
+		if rev, convErr := reverseNameForIP(queryName); convErr == nil {
+			queryName = rev
+		} else {
+			return false, "", nil, convErr
+		}
+	}
 	c := new(dns.Client)
 	m := new(dns.Msg)
 	m.SetQuestion(queryName, queryTypeAsUint16)
@@ -423,3 +473,47 @@ func QueryDNS(queryType, queryName, url string) (connected bool, dnsRcode string
 func InjectHTTPClient(httpClient *http.Client) {
 	injectedHTTPClient = httpClient
 }
+
+// rdapQuery returns domain expiration via RDAP protocol
+func rdapQuery(hostname string) (*whois.Response, error) {
+	data, _, err := rdapClient.Query(hostname, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	domain, ok := data.(*protocol.Domain)
+	if !ok {
+		return nil, errors.New("invalid domain type")
+	}
+	response := whois.Response{}
+	for _, e := range domain.Events {
+		if e.Action == "expiration" {
+			response.ExpirationDate = e.Date.Time
+			break
+		}
+	}
+	return &response, nil
+}
+
+// helper to reverse IP and add in-addr.arpa. IPv4 and IPv6
+func reverseNameForIP(ipStr string) (string, error) {
+	ip := net.ParseIP(ipStr)
+	if ip == nil {
+		return "", fmt.Errorf("invalid IP: %s", ipStr)
+	}
+
+	if ipv4 := ip.To4(); ipv4 != nil {
+		parts := strings.Split(ipv4.String(), ".")
+		for i, j := 0, len(parts)-1; i < j; i, j = i+1, j-1 {
+			parts[i], parts[j] = parts[j], parts[i]
+		}
+		return strings.Join(parts, ".") + ".in-addr.arpa.", nil
+	}
+
+	ip = ip.To16()
+	hexStr := hex.EncodeToString(ip)
+	nibbles := strings.Split(hexStr, "")
+	for i, j := 0, len(nibbles)-1; i < j; i, j = i+1, j-1 {
+		nibbles[i], nibbles[j] = nibbles[j], nibbles[i]
+	}
+	return strings.Join(nibbles, ".") + ".ip6.arpa.", nil
+}

client/client_test.go

@@ -39,28 +39,42 @@ func TestGetHTTPClient(t *testing.T) {
 	}
 }
 
+func TestRdapQuery(t *testing.T) {
+	if _, err := rdapQuery("1.1.1.1"); err == nil {
+		t.Error("expected an error due to the invalid domain type")
+	}
+	if _, err := rdapQuery("eurid.eu"); err == nil {
+		t.Error("expected an error as there is no RDAP support currently in .eu")
+	}
+	if response, err := rdapQuery("example.com"); err != nil {
+		t.Fatal("expected no error, got", err.Error())
+	} else if response.ExpirationDate.Unix() <= 0 {
+		t.Error("expected to have a valid expiry date, got", response.ExpirationDate.Unix())
+	}
+}
+
 func TestGetDomainExpiration(t *testing.T) {
 	t.Parallel()
-	if domainExpiration, err := GetDomainExpiration("example.com"); err != nil {
+	if domainExpiration, err := GetDomainExpiration("gatus.io"); err != nil {
 		t.Fatalf("expected error to be nil, but got: `%s`", err)
 	} else if domainExpiration <= 0 {
 		t.Error("expected domain expiration to be higher than 0")
 	}
-	if domainExpiration, err := GetDomainExpiration("example.com"); err != nil {
+	if domainExpiration, err := GetDomainExpiration("gatus.io"); err != nil {
 		t.Errorf("expected error to be nil, but got: `%s`", err)
 	} else if domainExpiration <= 0 {
 		t.Error("expected domain expiration to be higher than 0")
 	}
 	// Hack to pretend like the domain is expiring in 1 hour, which should trigger a refresh
-	whoisExpirationDateCache.SetWithTTL("example.com", time.Now().Add(time.Hour), 25*time.Hour)
-	if domainExpiration, err := GetDomainExpiration("example.com"); err != nil {
+	whoisExpirationDateCache.SetWithTTL("gatus.io", time.Now().Add(time.Hour), 25*time.Hour)
+	if domainExpiration, err := GetDomainExpiration("gatus.io"); err != nil {
 		t.Errorf("expected error to be nil, but got: `%s`", err)
 	} else if domainExpiration <= 0 {
 		t.Error("expected domain expiration to be higher than 0")
 	}
 	// Make sure the refresh works when the ttl is <24 hours
-	whoisExpirationDateCache.SetWithTTL("example.com", time.Now().Add(35*time.Hour), 23*time.Hour)
-	if domainExpiration, err := GetDomainExpiration("example.com"); err != nil {
+	whoisExpirationDateCache.SetWithTTL("gatus.io", time.Now().Add(35*time.Hour), 23*time.Hour)
+	if domainExpiration, err := GetDomainExpiration("gatus.io"); err != nil {
 		t.Errorf("expected error to be nil, but got: `%s`", err)
 	} else if domainExpiration <= 0 {
 		t.Error("expected domain expiration to be higher than 0")
@@ -119,6 +133,7 @@ func TestCanPerformStartTLS(t *testing.T) {
 	type args struct {
 		address  string
 		insecure bool
+		dnsresolver string
 	}
 	tests := []struct {
 		name          string
@@ -150,11 +165,20 @@ func TestCanPerformStartTLS(t *testing.T) {
 			wantConnected: true,
 			wantErr:       false,
 		},
+		{
+			name: "dns resolver",
+			args: args{
+				address: "smtp.gmail.com:587",
+				dnsresolver: "tcp://1.1.1.1:53",
+			},
+			wantConnected: true,
+			wantErr:       false,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			t.Parallel()
-			connected, _, err := CanPerformStartTLS(tt.args.address, &Config{Insecure: tt.args.insecure, Timeout: 5 * time.Second})
+			connected, _, err := CanPerformStartTLS(tt.args.address, &Config{Insecure: tt.args.insecure, Timeout: 5 * time.Second, DNSResolver: tt.args.dnsresolver})
 			if (err != nil) != tt.wantErr {
 				t.Errorf("CanPerformStartTLS() err=%v, wantErr=%v", err, tt.wantErr)
 				return
@@ -427,6 +451,16 @@ func TestQueryDNS(t *testing.T) {
 			expectedDNSCode: "NOERROR",
 			expectedBody:    "dns.google.",
 		},
+		{
+			name: "test Config with type PTR and forward IP / no in-addr",
+			inputDNS: dns.Config{
+				QueryType: "PTR",
+				QueryName: "1.0.0.1",
+			},
+			inputURL:        "1.1.1.1",
+			expectedDNSCode: "NOERROR",
+			expectedBody:    "one.one.one.one.",
+		},
 		{
 			name: "test Config with fake type and retrieve error",
 			inputDNS: dns.Config{

client/config.go

@@ -11,6 +11,7 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/TwiN/gatus/v5/config/tunneling/sshtunnel"
 	"github.com/TwiN/logr"
 	"golang.org/x/oauth2"
 	"golang.org/x/oauth2/clientcredentials"
@@ -69,13 +70,19 @@ type Config struct {
 	// IAPConfig is the Google Cloud Identity-Aware-Proxy configuration used for the client. (e.g. audience)
 	IAPConfig *IAPConfig `yaml:"identity-aware-proxy,omitempty"`
 
-	httpClient *http.Client
-
 	// Network (ip, ip4 or ip6) for the ICMP client
 	Network string `yaml:"network"`
 
 	// TLS configuration (optional)
 	TLS *TLSConfig `yaml:"tls,omitempty"`
+
+	// Tunnel is the name of the SSH tunnel to use for the client
+	Tunnel string `yaml:"tunnel,omitempty"`
+
+	// ResolvedTunnel is the resolved SSH tunnel for this specific Config
+	ResolvedTunnel *sshtunnel.SSHTunnel `yaml:"-"`
+
+	httpClient *http.Client
 }
 
 // DNSResolverConfig is the parsed configuration from the DNSResolver config string.
@@ -265,6 +272,14 @@ func (c *Config) getHTTPClient() *http.Client {
 		} else if c.HasIAPConfig() {
 			c.httpClient = configureIAP(c.httpClient, *c.IAPConfig)
 		}
+		if c.ResolvedTunnel != nil {
+			// Use SSH tunnel dialer
+			if transport, ok := c.httpClient.Transport.(*http.Transport); ok {
+				transport.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
+					return c.ResolvedTunnel.Dial(network, addr)
+				}
+			}
+		}
 	}
 	return c.httpClient
 }

config.yaml

@@ -37,7 +37,7 @@ endpoints:
       query-name: "example.com"
       query-type: "A"
     conditions:
-      - "[BODY] == 93.184.215.14"
+      - "[BODY] == pat(*.*.*.*)"  # Matches any IPv4 address
       - "[DNS_RCODE] == NOERROR"
 
   - name: icmp-ping

config/announcement/announcement.go

@@ -0,0 +1,94 @@
+package announcement
+
+import (
+	"errors"
+	"sort"
+	"time"
+)
+
+const (
+	// TypeOutage represents a service outage
+	TypeOutage = "outage"
+
+	// TypeWarning represents a warning or potential issue
+	TypeWarning = "warning"
+
+	// TypeInformation represents general information
+	TypeInformation = "information"
+
+	// TypeOperational represents operational status or resolved issues
+	TypeOperational = "operational"
+
+	// TypeNone represents no specific type (default)
+	TypeNone = "none"
+)
+
+var (
+	// ErrInvalidAnnouncementType is returned when an invalid announcement type is specified
+	ErrInvalidAnnouncementType = errors.New("invalid announcement type")
+
+	// ErrEmptyMessage is returned when an announcement has an empty message
+	ErrEmptyMessage = errors.New("announcement message cannot be empty")
+
+	// ErrMissingTimestamp is returned when an announcement has an empty timestamp
+	ErrMissingTimestamp = errors.New("announcement timestamp must be set")
+
+	// validTypes contains all valid announcement types
+	validTypes = map[string]bool{
+		TypeOutage:      true,
+		TypeWarning:     true,
+		TypeInformation: true,
+		TypeOperational: true,
+		TypeNone:        true,
+	}
+)
+
+// Announcement represents a system-wide announcement
+type Announcement struct {
+	// Timestamp is the UTC timestamp when the announcement was made
+	Timestamp time.Time `yaml:"timestamp" json:"timestamp"`
+
+	// Type is the type of announcement (outage, warning, information, operational, none)
+	Type string `yaml:"type" json:"type"`
+
+	// Message is the user-facing text describing the announcement
+	Message string `yaml:"message" json:"message"`
+}
+
+// ValidateAndSetDefaults validates the announcement and sets default values if necessary
+func (a *Announcement) ValidateAndSetDefaults() error {
+	// Validate message
+	if a.Message == "" {
+		return ErrEmptyMessage
+	}
+	// Set default type if empty
+	if a.Type == "" {
+		a.Type = TypeNone
+	}
+	// Validate type
+	if !validTypes[a.Type] {
+		return ErrInvalidAnnouncementType
+	}
+	// If timestamp is zero, return an error
+	if a.Timestamp.IsZero() {
+		return ErrMissingTimestamp
+	}
+	return nil
+}
+
+// SortByTimestamp sorts a slice of announcements by timestamp in descending order (newest first)
+func SortByTimestamp(announcements []*Announcement) {
+	sort.Slice(announcements, func(i, j int) bool {
+		return announcements[i].Timestamp.After(announcements[j].Timestamp)
+	})
+}
+
+// ValidateAndSetDefaults validates a slice of announcements and sets defaults
+func ValidateAndSetDefaults(announcements []*Announcement) error {
+	for _, announcement := range announcements {
+		if err := announcement.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
+	}
+	return nil
+}

config/config.go

@@ -6,6 +6,7 @@ import (
 	"io/fs"
 	"os"
 	"path/filepath"
+	"sort"
 	"strings"
 	"time"
 
@@ -13,16 +14,20 @@ import (
 	"github.com/TwiN/gatus/v5/alerting"
 	"github.com/TwiN/gatus/v5/alerting/alert"
 	"github.com/TwiN/gatus/v5/alerting/provider"
+	"github.com/TwiN/gatus/v5/client"
+	"github.com/TwiN/gatus/v5/config/announcement"
 	"github.com/TwiN/gatus/v5/config/connectivity"
 	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/config/key"
 	"github.com/TwiN/gatus/v5/config/maintenance"
 	"github.com/TwiN/gatus/v5/config/remote"
+	"github.com/TwiN/gatus/v5/config/suite"
+	"github.com/TwiN/gatus/v5/config/tunneling"
 	"github.com/TwiN/gatus/v5/config/ui"
 	"github.com/TwiN/gatus/v5/config/web"
 	"github.com/TwiN/gatus/v5/security"
 	"github.com/TwiN/gatus/v5/storage"
 	"github.com/TwiN/logr"
-	"github.com/gofiber/fiber/v2/log"
 	"gopkg.in/yaml.v3"
 )
 
@@ -34,11 +39,14 @@ const (
 	// DefaultFallbackConfigurationFilePath is the default fallback path that will be used to search for the
 	// configuration file if DefaultConfigurationFilePath didn't work
 	DefaultFallbackConfigurationFilePath = "config/config.yml"
+
+	// DefaultConcurrency is the default number of endpoints/suites that can be monitored concurrently
+	DefaultConcurrency = 3
 )
 
 var (
-	// ErrNoEndpointInConfig is an error returned when a configuration file or directory has no endpoints configured
-	ErrNoEndpointInConfig = errors.New("configuration should contain at least 1 endpoint")
+	// ErrNoEndpointOrSuiteInConfig is an error returned when a configuration file or directory has no endpoints configured
+	ErrNoEndpointOrSuiteInConfig = errors.New("configuration should contain at least one endpoint or suite")
 
 	// ErrConfigFileNotFound is an error returned when a configuration file could not be found
 	ErrConfigFileNotFound = errors.New("configuration file not found")
@@ -66,8 +74,14 @@ type Config struct {
 	// DisableMonitoringLock Whether to disable the monitoring lock
 	// The monitoring lock is what prevents multiple endpoints from being processed at the same time.
 	// Disabling this may lead to inaccurate response times
+	//
+	// Deprecated: Use Concurrency instead TODO: REMOVE THIS IN v6.0.0
 	DisableMonitoringLock bool `yaml:"disable-monitoring-lock,omitempty"`
 
+	// Concurrency is the maximum number of endpoints/suites that can be monitored concurrently
+	// Defaults to DefaultConcurrency. Set to 0 for unlimited concurrency.
+	Concurrency int `yaml:"concurrency,omitempty"`
+
 	// Security is the configuration for securing access to Gatus
 	Security *security.Config `yaml:"security,omitempty"`
 
@@ -80,6 +94,9 @@ type Config struct {
 	// ExternalEndpoints is the list of all external endpoints
 	ExternalEndpoints []*endpoint.ExternalEndpoint `yaml:"external-endpoints,omitempty"`
 
+	// Suites is the list of suites to monitor
+	Suites []*suite.Suite `yaml:"suites,omitempty"`
+
 	// Storage is the configuration for how the data is stored
 	Storage *storage.Config `yaml:"storage,omitempty"`
 
@@ -99,10 +116,38 @@ type Config struct {
 	// Connectivity is the configuration for connectivity
 	Connectivity *connectivity.Config `yaml:"connectivity,omitempty"`
 
+	// Tunneling is the configuration for SSH tunneling
+	Tunneling *tunneling.Config `yaml:"tunneling,omitempty"`
+
+	// Announcements is the list of system-wide announcements
+	Announcements []*announcement.Announcement `yaml:"announcements,omitempty"`
+
 	configPath      string    // path to the file or directory from which config was loaded
 	lastFileModTime time.Time // last modification time
 }
 
+// GetUniqueExtraMetricLabels returns a slice of unique metric labels from all enabled endpoints
+// in the configuration. It iterates through each endpoint, checks if it is enabled,
+// and then collects unique labels from the endpoint's labels map.
+func (config *Config) GetUniqueExtraMetricLabels() []string {
+	labels := make([]string, 0)
+	for _, ep := range config.Endpoints {
+		if !ep.IsEnabled() {
+			continue
+		}
+		for label := range ep.ExtraLabels {
+			if contains(labels, label) {
+				continue
+			}
+			labels = append(labels, label)
+		}
+	}
+	if len(labels) > 1 {
+		sort.Strings(labels)
+	}
+	return labels
+}
+
 func (config *Config) GetEndpointByKey(key string) *endpoint.Endpoint {
 	for i := 0; i < len(config.Endpoints); i++ {
 		ep := config.Endpoints[i]
@@ -246,8 +291,8 @@ func parseAndValidateConfigBytes(yamlBytes []byte) (config *Config, err error) {
 		return
 	}
 	// Check if the configuration file at least has endpoints configured
-	if config == nil || config.Endpoints == nil || len(config.Endpoints) == 0 {
-		err = ErrNoEndpointInConfig
+	if config == nil || (len(config.Endpoints) == 0 && len(config.Suites) == 0) {
+		err = ErrNoEndpointOrSuiteInConfig
 	} else {
 		// XXX: Remove this in v6.0.0
 		if config.Debug {
@@ -255,45 +300,122 @@ func parseAndValidateConfigBytes(yamlBytes []byte) (config *Config, err error) {
 			logr.Warn("WARNING: Please use the GATUS_LOG_LEVEL environment variable instead")
 		}
 		// XXX: End of v6.0.0 removals
-		validateAlertingConfig(config.Alerting, config.Endpoints, config.ExternalEndpoints)
-		if err := validateSecurityConfig(config); err != nil {
+		ValidateAlertingConfig(config.Alerting, config.Endpoints, config.ExternalEndpoints)
+		if err := ValidateSecurityConfig(config); err != nil {
 			return nil, err
 		}
-		if err := validateEndpointsConfig(config); err != nil {
+		if err := ValidateEndpointsConfig(config); err != nil {
 			return nil, err
 		}
-		if err := validateWebConfig(config); err != nil {
+		if err := ValidateWebConfig(config); err != nil {
 			return nil, err
 		}
-		if err := validateUIConfig(config); err != nil {
+		if err := ValidateUIConfig(config); err != nil {
 			return nil, err
 		}
-		if err := validateMaintenanceConfig(config); err != nil {
+		if err := ValidateMaintenanceConfig(config); err != nil {
 			return nil, err
 		}
-		if err := validateStorageConfig(config); err != nil {
+		if err := ValidateStorageConfig(config); err != nil {
 			return nil, err
 		}
-		if err := validateRemoteConfig(config); err != nil {
+		if err := ValidateRemoteConfig(config); err != nil {
 			return nil, err
 		}
-		if err := validateConnectivityConfig(config); err != nil {
+		if err := ValidateConnectivityConfig(config); err != nil {
 			return nil, err
 		}
+		if err := ValidateTunnelingConfig(config); err != nil {
+			return nil, err
+		}
+		if err := ValidateAnnouncementsConfig(config); err != nil {
+			return nil, err
+		}
+		if err := ValidateSuitesConfig(config); err != nil {
+			return nil, err
+		}
+		if err := ValidateUniqueKeys(config); err != nil {
+			return nil, err
+		}
+		ValidateAndSetConcurrencyDefaults(config)
 		// Cross-config changes
 		config.UI.MaximumNumberOfResults = config.Storage.MaximumNumberOfResults
 	}
 	return
 }
 
-func validateConnectivityConfig(config *Config) error {
+func ValidateConnectivityConfig(config *Config) error {
 	if config.Connectivity != nil {
 		return config.Connectivity.ValidateAndSetDefaults()
 	}
 	return nil
 }
 
-func validateRemoteConfig(config *Config) error {
+// ValidateTunnelingConfig validates the tunneling configuration and resolves tunnel references
+// NOTE: This must be called after ValidateEndpointsConfig and ValidateSuitesConfig
+// because it resolves tunnel references in endpoint and suite client configurations
+func ValidateTunnelingConfig(config *Config) error {
+	if config.Tunneling != nil {
+		if err := config.Tunneling.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
+		// Resolve tunnel references in all endpoints
+		for _, ep := range config.Endpoints {
+			if err := resolveTunnelForClientConfig(config, ep.ClientConfig); err != nil {
+				return fmt.Errorf("endpoint '%s': %w", ep.Key(), err)
+			}
+		}
+		// Resolve tunnel references in suite endpoints
+		for _, s := range config.Suites {
+			for _, ep := range s.Endpoints {
+				if err := resolveTunnelForClientConfig(config, ep.ClientConfig); err != nil {
+					return fmt.Errorf("suite '%s' endpoint '%s': %w", s.Key(), ep.Key(), err)
+				}
+			}
+		}
+		// TODO: Add tunnel support for alert providers when needed
+	}
+	return nil
+}
+
+// resolveTunnelForClientConfig resolves tunnel references in a client configuration
+func resolveTunnelForClientConfig(config *Config, clientConfig *client.Config) error {
+	if clientConfig == nil || clientConfig.Tunnel == "" {
+		return nil
+	}
+	// Validate tunnel name
+	tunnelName := strings.TrimSpace(clientConfig.Tunnel)
+	if tunnelName == "" {
+		return fmt.Errorf("tunnel name cannot be empty")
+	}
+	if config.Tunneling == nil {
+		return fmt.Errorf("tunnel '%s' referenced but no tunneling configuration defined", tunnelName)
+	}
+	_, exists := config.Tunneling.Tunnels[tunnelName]
+	if !exists {
+		return fmt.Errorf("tunnel '%s' not found in tunneling configuration", tunnelName)
+	}
+	// Get or create the SSH tunnel instance and store it directly in client config
+	tunnel, err := config.Tunneling.GetTunnel(tunnelName)
+	if err != nil {
+		return fmt.Errorf("failed to get tunnel '%s': %w", tunnelName, err)
+	}
+	clientConfig.ResolvedTunnel = tunnel
+	return nil
+}
+
+func ValidateAnnouncementsConfig(config *Config) error {
+	if config.Announcements != nil {
+		if err := announcement.ValidateAndSetDefaults(config.Announcements); err != nil {
+			return err
+		}
+		// Sort announcements by timestamp (newest first) for API response
+		announcement.SortByTimestamp(config.Announcements)
+	}
+	return nil
+}
+
+func ValidateRemoteConfig(config *Config) error {
 	if config.Remote != nil {
 		if err := config.Remote.ValidateAndSetDefaults(); err != nil {
 			return err
@@ -302,7 +424,7 @@ func validateRemoteConfig(config *Config) error {
 	return nil
 }
 
-func validateStorageConfig(config *Config) error {
+func ValidateStorageConfig(config *Config) error {
 	if config.Storage == nil {
 		config.Storage = &storage.Config{
 			Type:                   storage.TypeMemory,
@@ -317,7 +439,7 @@ func validateStorageConfig(config *Config) error {
 	return nil
 }
 
-func validateMaintenanceConfig(config *Config) error {
+func ValidateMaintenanceConfig(config *Config) error {
 	if config.Maintenance == nil {
 		config.Maintenance = maintenance.GetDefaultConfig()
 	} else {
@@ -328,7 +450,7 @@ func validateMaintenanceConfig(config *Config) error {
 	return nil
 }
 
-func validateUIConfig(config *Config) error {
+func ValidateUIConfig(config *Config) error {
 	if config.UI == nil {
 		config.UI = ui.GetDefaultConfig()
 	} else {
@@ -339,7 +461,7 @@ func validateUIConfig(config *Config) error {
 	return nil
 }
 
-func validateWebConfig(config *Config) error {
+func ValidateWebConfig(config *Config) error {
 	if config.Web == nil {
 		config.Web = web.GetDefaultConfig()
 	} else {
@@ -348,11 +470,11 @@ func validateWebConfig(config *Config) error {
 	return nil
 }
 
-func validateEndpointsConfig(config *Config) error {
+func ValidateEndpointsConfig(config *Config) error {
 	duplicateValidationMap := make(map[string]bool)
 	// Validate endpoints
 	for _, ep := range config.Endpoints {
-		logr.Debugf("[config.validateEndpointsConfig] Validating endpoint with key %s", ep.Key())
+		logr.Debugf("[config.ValidateEndpointsConfig] Validating endpoint with key %s", ep.Key())
 		if endpointKey := ep.Key(); duplicateValidationMap[endpointKey] {
 			return fmt.Errorf("invalid endpoint %s: name and group combination must be unique", ep.Key())
 		} else {
@@ -362,10 +484,10 @@ func validateEndpointsConfig(config *Config) error {
 			return fmt.Errorf("invalid endpoint %s: %w", ep.Key(), err)
 		}
 	}
-	logr.Infof("[config.validateEndpointsConfig] Validated %d endpoints", len(config.Endpoints))
+	logr.Infof("[config.ValidateEndpointsConfig] Validated %d endpoints", len(config.Endpoints))
 	// Validate external endpoints
 	for _, ee := range config.ExternalEndpoints {
-		logr.Debugf("[config.validateEndpointsConfig] Validating external endpoint '%s'", ee.Name)
+		logr.Debugf("[config.ValidateEndpointsConfig] Validating external endpoint '%s'", ee.Key())
 		if endpointKey := ee.Key(); duplicateValidationMap[endpointKey] {
 			return fmt.Errorf("invalid external endpoint %s: name and group combination must be unique", ee.Key())
 		} else {
@@ -375,35 +497,105 @@ func validateEndpointsConfig(config *Config) error {
 			return fmt.Errorf("invalid external endpoint %s: %w", ee.Key(), err)
 		}
 	}
-	logr.Infof("[config.validateEndpointsConfig] Validated %d external endpoints", len(config.ExternalEndpoints))
+	logr.Infof("[config.ValidateEndpointsConfig] Validated %d external endpoints", len(config.ExternalEndpoints))
 	return nil
 }
 
-func validateSecurityConfig(config *Config) error {
+func ValidateSuitesConfig(config *Config) error {
+	if config.Suites == nil || len(config.Suites) == 0 {
+		logr.Info("[config.ValidateSuitesConfig] No suites configured")
+		return nil
+	}
+	suiteNames := make(map[string]bool)
+	for _, suite := range config.Suites {
+		// Check for duplicate suite names
+		if suiteNames[suite.Name] {
+			return fmt.Errorf("duplicate suite name: %s", suite.Key())
+		}
+		suiteNames[suite.Name] = true
+		// Validate the suite configuration
+		if err := suite.ValidateAndSetDefaults(); err != nil {
+			return fmt.Errorf("invalid suite '%s': %w", suite.Key(), err)
+		}
+		// Check that endpoints referenced in Store mappings use valid placeholders
+		for _, suiteEndpoint := range suite.Endpoints {
+			if suiteEndpoint.Store != nil {
+				for contextKey, placeholder := range suiteEndpoint.Store {
+					// Basic validation that the context key is a valid identifier
+					if len(contextKey) == 0 {
+						return fmt.Errorf("suite '%s' endpoint '%s' has empty context key in store mapping", suite.Key(), suiteEndpoint.Key())
+					}
+					if len(placeholder) == 0 {
+						return fmt.Errorf("suite '%s' endpoint '%s' has empty placeholder in store mapping for key '%s'", suite.Key(), suiteEndpoint.Key(), contextKey)
+					}
+				}
+			}
+		}
+	}
+	logr.Infof("[config.ValidateSuitesConfig] Validated %d suite(s)", len(config.Suites))
+	return nil
+}
+
+func ValidateUniqueKeys(config *Config) error {
+	keyMap := make(map[string]string) // key -> description for error messages
+	// Check all endpoints
+	for _, ep := range config.Endpoints {
+		epKey := ep.Key()
+		if existing, exists := keyMap[epKey]; exists {
+			return fmt.Errorf("duplicate key '%s': endpoint '%s' conflicts with %s", epKey, ep.Key(), existing)
+		}
+		keyMap[epKey] = fmt.Sprintf("endpoint '%s'", ep.Key())
+	}
+	// Check all external endpoints
+	for _, ee := range config.ExternalEndpoints {
+		eeKey := ee.Key()
+		if existing, exists := keyMap[eeKey]; exists {
+			return fmt.Errorf("duplicate key '%s': external endpoint '%s' conflicts with %s", eeKey, ee.Key(), existing)
+		}
+		keyMap[eeKey] = fmt.Sprintf("external endpoint '%s'", ee.Key())
+	}
+	// Check all suites
+	for _, suite := range config.Suites {
+		suiteKey := suite.Key()
+		if existing, exists := keyMap[suiteKey]; exists {
+			return fmt.Errorf("duplicate key '%s': suite '%s' conflicts with %s", suiteKey, suite.Key(), existing)
+		}
+		keyMap[suiteKey] = fmt.Sprintf("suite '%s'", suite.Key())
+		// Check endpoints within suites (they generate keys using suite group + endpoint name)
+		for _, ep := range suite.Endpoints {
+			epKey := key.ConvertGroupAndNameToKey(suite.Group, ep.Name)
+			if existing, exists := keyMap[epKey]; exists {
+				return fmt.Errorf("duplicate key '%s': endpoint '%s' in suite '%s' conflicts with %s", epKey, epKey, suite.Key(), existing)
+			}
+			keyMap[epKey] = fmt.Sprintf("endpoint '%s' in suite '%s'", epKey, suite.Key())
+		}
+	}
+	return nil
+}
+
+func ValidateSecurityConfig(config *Config) error {
 	if config.Security != nil {
-		if config.Security.IsValid() {
-			logr.Debug("[config.validateSecurityConfig] Basic security configuration has been validated")
-		} else {
-			// If there was an attempt to configure security, then it must mean that some confidential or private
-			// data are exposed. As a result, we'll force a panic because it's better to be safe than sorry.
+		if !config.Security.ValidateAndSetDefaults() {
+			logr.Debug("[config.ValidateSecurityConfig] Basic security configuration has been validated")
 			return ErrInvalidSecurityConfig
 		}
 	}
 	return nil
 }
 
-// validateAlertingConfig validates the alerting configuration
+// ValidateAlertingConfig validates the alerting configuration
 // Note that the alerting configuration has to be validated before the endpoint configuration, because the default alert
 // returned by provider.AlertProvider.GetDefaultAlert() must be parsed before endpoint.Endpoint.ValidateAndSetDefaults()
 // sets the default alert values when none are set.
-func validateAlertingConfig(alertingConfig *alerting.Config, endpoints []*endpoint.Endpoint, externalEndpoints []*endpoint.ExternalEndpoint) {
+func ValidateAlertingConfig(alertingConfig *alerting.Config, endpoints []*endpoint.Endpoint, externalEndpoints []*endpoint.ExternalEndpoint) {
 	if alertingConfig == nil {
-		logr.Info("[config.validateAlertingConfig] Alerting is not configured")
+		logr.Info("[config.ValidateAlertingConfig] Alerting is not configured")
 		return
 	}
 	alertTypes := []alert.Type{
 		alert.TypeAWSSES,
 		alert.TypeCustom,
+		alert.TypeDatadog,
 		alert.TypeDiscord,
 		alert.TypeEmail,
 		alert.TypeGitHub,
@@ -412,21 +604,34 @@ func validateAlertingConfig(alertingConfig *alerting.Config, endpoints []*endpoi
 		alert.TypeGoogleChat,
 		alert.TypeGotify,
 		alert.TypeHomeAssistant,
+		alert.TypeIFTTT,
 		alert.TypeIlert,
 		alert.TypeIncidentIO,
 		alert.TypeJetBrainsSpace,
+		alert.TypeLine,
 		alert.TypeMatrix,
 		alert.TypeMattermost,
 		alert.TypeMessagebird,
+		alert.TypeNewRelic,
 		alert.TypeNtfy,
 		alert.TypeOpsgenie,
 		alert.TypePagerDuty,
+		alert.TypePlivo,
 		alert.TypePushover,
+		alert.TypeRocketChat,
+		alert.TypeSendGrid,
+		alert.TypeSignal,
+		alert.TypeSIGNL4,
 		alert.TypeSlack,
+		alert.TypeSplunk,
+		alert.TypeSquadcast,
 		alert.TypeTeams,
 		alert.TypeTeamsWorkflows,
 		alert.TypeTelegram,
 		alert.TypeTwilio,
+		alert.TypeVonage,
+		alert.TypeWebex,
+		alert.TypeZapier,
 		alert.TypeZulip,
 	}
 	var validProviders, invalidProviders []alert.Type
@@ -439,12 +644,12 @@ func validateAlertingConfig(alertingConfig *alerting.Config, endpoints []*endpoi
 					for _, ep := range endpoints {
 						for alertIndex, endpointAlert := range ep.Alerts {
 							if alertType == endpointAlert.Type {
-								logr.Debugf("[config.validateAlertingConfig] Parsing alert %d with default alert for provider=%s in endpoint with key=%s", alertIndex, alertType, ep.Key())
+								logr.Debugf("[config.ValidateAlertingConfig] Parsing alert %d with default alert for provider=%s in endpoint with key=%s", alertIndex, alertType, ep.Key())
 								provider.MergeProviderDefaultAlertIntoEndpointAlert(alertProvider.GetDefaultAlert(), endpointAlert)
 								// Validate the endpoint alert's overrides, if applicable
 								if len(endpointAlert.ProviderOverride) > 0 {
 									if err = alertProvider.ValidateOverrides(ep.Group, endpointAlert); err != nil {
-										log.Warnf("[config.validateAlertingConfig] endpoint with key=%s has invalid overrides for provider=%s: %s", ep.Key(), alertType, err.Error())
+										logr.Warnf("[config.ValidateAlertingConfig] endpoint with key=%s has invalid overrides for provider=%s: %s", ep.Key(), alertType, err.Error())
 									}
 								}
 							}
@@ -453,12 +658,12 @@ func validateAlertingConfig(alertingConfig *alerting.Config, endpoints []*endpoi
 					for _, ee := range externalEndpoints {
 						for alertIndex, endpointAlert := range ee.Alerts {
 							if alertType == endpointAlert.Type {
-								logr.Debugf("[config.validateAlertingConfig] Parsing alert %d with default alert for provider=%s in endpoint with key=%s", alertIndex, alertType, ee.Key())
+								logr.Debugf("[config.ValidateAlertingConfig] Parsing alert %d with default alert for provider=%s in endpoint with key=%s", alertIndex, alertType, ee.Key())
 								provider.MergeProviderDefaultAlertIntoEndpointAlert(alertProvider.GetDefaultAlert(), endpointAlert)
 								// Validate the endpoint alert's overrides, if applicable
 								if len(endpointAlert.ProviderOverride) > 0 {
 									if err = alertProvider.ValidateOverrides(ee.Group, endpointAlert); err != nil {
-										log.Warnf("[config.validateAlertingConfig] endpoint with key=%s has invalid overrides for provider=%s: %s", ee.Key(), alertType, err.Error())
+										logr.Warnf("[config.ValidateAlertingConfig] endpoint with key=%s has invalid overrides for provider=%s: %s", ee.Key(), alertType, err.Error())
 									}
 								}
 							}
@@ -467,7 +672,7 @@ func validateAlertingConfig(alertingConfig *alerting.Config, endpoints []*endpoi
 				}
 				validProviders = append(validProviders, alertType)
 			} else {
-				logr.Warnf("[config.validateAlertingConfig] Ignoring provider=%s due to error=%s", alertType, err.Error())
+				logr.Warnf("[config.ValidateAlertingConfig] Ignoring provider=%s due to error=%s", alertType, err.Error())
 				invalidProviders = append(invalidProviders, alertType)
 				alertingConfig.SetAlertingProviderToNil(alertProvider)
 			}
@@ -475,5 +680,19 @@ func validateAlertingConfig(alertingConfig *alerting.Config, endpoints []*endpoi
 			invalidProviders = append(invalidProviders, alertType)
 		}
 	}
-	logr.Infof("[config.validateAlertingConfig] configuredProviders=%s; ignoredProviders=%s", validProviders, invalidProviders)
+	logr.Infof("[config.ValidateAlertingConfig] configuredProviders=%s; ignoredProviders=%s", validProviders, invalidProviders)
+}
+
+func ValidateAndSetConcurrencyDefaults(config *Config) {
+	if config.DisableMonitoringLock {
+		config.Concurrency = 0
+		logr.Warn("WARNING: The 'disable-monitoring-lock' configuration has been deprecated and will be removed in v6.0.0")
+		logr.Warn("WARNING: Please set 'concurrency: 0' instead")
+		logr.Debug("[config.ValidateAndSetConcurrencyDefaults] DisableMonitoringLock is true, setting unlimited (0) concurrency")
+	} else if config.Concurrency <= 0 && !config.DisableMonitoringLock {
+		config.Concurrency = DefaultConcurrency
+		logr.Debugf("[config.ValidateAndSetConcurrencyDefaults] Setting default concurrency to %d", config.Concurrency)
+	} else {
+		logr.Debugf("[config.ValidateAndSetConcurrencyDefaults] Using configured concurrency of %d", config.Concurrency)
+	}
 }

config/config_test.go

@@ -13,6 +13,7 @@ import (
 	"github.com/TwiN/gatus/v5/alerting/provider"
 	"github.com/TwiN/gatus/v5/alerting/provider/awsses"
 	"github.com/TwiN/gatus/v5/alerting/provider/custom"
+	"github.com/TwiN/gatus/v5/alerting/provider/datadog"
 	"github.com/TwiN/gatus/v5/alerting/provider/discord"
 	"github.com/TwiN/gatus/v5/alerting/provider/email"
 	"github.com/TwiN/gatus/v5/alerting/provider/gitea"
@@ -20,22 +21,41 @@ import (
 	"github.com/TwiN/gatus/v5/alerting/provider/gitlab"
 	"github.com/TwiN/gatus/v5/alerting/provider/googlechat"
 	"github.com/TwiN/gatus/v5/alerting/provider/gotify"
+	"github.com/TwiN/gatus/v5/alerting/provider/homeassistant"
+	"github.com/TwiN/gatus/v5/alerting/provider/ifttt"
+	"github.com/TwiN/gatus/v5/alerting/provider/ilert"
+	"github.com/TwiN/gatus/v5/alerting/provider/incidentio"
 	"github.com/TwiN/gatus/v5/alerting/provider/jetbrainsspace"
+	"github.com/TwiN/gatus/v5/alerting/provider/line"
 	"github.com/TwiN/gatus/v5/alerting/provider/matrix"
 	"github.com/TwiN/gatus/v5/alerting/provider/mattermost"
 	"github.com/TwiN/gatus/v5/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v5/alerting/provider/newrelic"
 	"github.com/TwiN/gatus/v5/alerting/provider/ntfy"
 	"github.com/TwiN/gatus/v5/alerting/provider/opsgenie"
 	"github.com/TwiN/gatus/v5/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v5/alerting/provider/plivo"
 	"github.com/TwiN/gatus/v5/alerting/provider/pushover"
+	"github.com/TwiN/gatus/v5/alerting/provider/rocketchat"
+	"github.com/TwiN/gatus/v5/alerting/provider/sendgrid"
+	"github.com/TwiN/gatus/v5/alerting/provider/signal"
+	"github.com/TwiN/gatus/v5/alerting/provider/signl4"
 	"github.com/TwiN/gatus/v5/alerting/provider/slack"
+	"github.com/TwiN/gatus/v5/alerting/provider/splunk"
+	"github.com/TwiN/gatus/v5/alerting/provider/squadcast"
 	"github.com/TwiN/gatus/v5/alerting/provider/teams"
 	"github.com/TwiN/gatus/v5/alerting/provider/teamsworkflows"
 	"github.com/TwiN/gatus/v5/alerting/provider/telegram"
 	"github.com/TwiN/gatus/v5/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v5/alerting/provider/vonage"
+	"github.com/TwiN/gatus/v5/alerting/provider/webex"
+	"github.com/TwiN/gatus/v5/alerting/provider/zapier"
 	"github.com/TwiN/gatus/v5/alerting/provider/zulip"
 	"github.com/TwiN/gatus/v5/client"
 	"github.com/TwiN/gatus/v5/config/endpoint"
+	"github.com/TwiN/gatus/v5/config/suite"
+	"github.com/TwiN/gatus/v5/config/tunneling"
+	"github.com/TwiN/gatus/v5/config/tunneling/sshtunnel"
 	"github.com/TwiN/gatus/v5/config/web"
 	"github.com/TwiN/gatus/v5/storage"
 	"gopkg.in/yaml.v3"
@@ -118,13 +138,13 @@ endpoints:
 			pathAndFiles: map[string]string{
 				"config.yaml": "",
 			},
-			expectedError: ErrNoEndpointInConfig,
+			expectedError: ErrNoEndpointOrSuiteInConfig,
 		},
 		{
 			name:       "dir-with-two-config-files",
 			configPath: dir,
 			pathAndFiles: map[string]string{
-				"config.yaml": `endpoints: 
+				"config.yaml": `endpoints:
   - name: one
     url: https://example.com
     conditions:
@@ -135,7 +155,7 @@ endpoints:
     url: https://example.org
     conditions:
       - "len([BODY]) > 0"`,
-				"config.yml": `endpoints: 
+				"config.yml": `endpoints:
   - name: three
     url: https://twin.sh/health
     conditions:
@@ -237,7 +257,7 @@ endpoints:
 	for _, scenario := range scenarios {
 		t.Run(scenario.name, func(t *testing.T) {
 			for path, content := range scenario.pathAndFiles {
-				if err := os.WriteFile(filepath.Join(dir, path), []byte(content), 0644); err != nil {
+				if err := os.WriteFile(filepath.Join(dir, path), []byte(content), 0o644); err != nil {
 					t.Fatalf("[%s] failed to write file: %v", scenario.name, err)
 				}
 			}
@@ -282,7 +302,7 @@ func TestConfig_HasLoadedConfigurationBeenModified(t *testing.T) {
     url: https://twin.sh/health
     conditions:
       - "[STATUS] == 200"
-`), 0644)
+`), 0o644)
 
 	t.Run("config-file-as-config-path", func(t *testing.T) {
 		config, err := LoadConfiguration(configFilePath)
@@ -298,7 +318,7 @@ func TestConfig_HasLoadedConfigurationBeenModified(t *testing.T) {
   - name: website
     url: https://twin.sh/health
     conditions:
-      - "[STATUS] == 200"`), 0644); err != nil {
+      - "[STATUS] == 200"`), 0o644); err != nil {
 			t.Fatalf("failed to overwrite config file: %v", err)
 		}
 		if !config.HasLoadedConfigurationBeenModified() {
@@ -315,7 +335,7 @@ func TestConfig_HasLoadedConfigurationBeenModified(t *testing.T) {
 		}
 		time.Sleep(time.Second) // Because the file mod time only has second precision, we have to wait for a second
 		// Update the config file
-		if err = os.WriteFile(filepath.Join(dir, "metrics.yaml"), []byte(`metrics: true`), 0644); err != nil {
+		if err = os.WriteFile(filepath.Join(dir, "metrics.yaml"), []byte(`metrics: true`), 0o644); err != nil {
 			t.Fatalf("failed to overwrite config file: %v", err)
 		}
 		if !config.HasLoadedConfigurationBeenModified() {
@@ -713,15 +733,15 @@ func TestParseAndValidateBadConfigBytes(t *testing.T) {
 	_, err := parseAndValidateConfigBytes([]byte(`
 badconfig:
   - asdsa: w0w
-    usadasdrl: asdxzczxc	
+    usadasdrl: asdxzczxc
     asdas:
       - soup
 `))
 	if err == nil {
 		t.Error("An error should've been returned")
 	}
-	if err != ErrNoEndpointInConfig {
-		t.Error("The error returned should have been of type ErrNoEndpointInConfig")
+	if err != ErrNoEndpointOrSuiteInConfig {
+		t.Error("The error returned should have been of type ErrNoEndpointOrSuiteInConfig")
 	}
 }
 
@@ -1833,7 +1853,7 @@ endpoints:
 	if config.Security == nil {
 		t.Fatal("config.Security shouldn't have been nil")
 	}
-	if !config.Security.IsValid() {
+	if !config.Security.ValidateAndSetDefaults() {
 		t.Error("Security config should've been valid")
 	}
 	if config.Security.Basic == nil {
@@ -1876,8 +1896,8 @@ endpoints:
 
 func TestParseAndValidateConfigBytesWithNoEndpoints(t *testing.T) {
 	_, err := parseAndValidateConfigBytes([]byte(``))
-	if !errors.Is(err, ErrNoEndpointInConfig) {
-		t.Error("The error returned should have been of type ErrNoEndpointInConfig")
+	if !errors.Is(err, ErrNoEndpointOrSuiteInConfig) {
+		t.Error("The error returned should have been of type ErrNoEndpointOrSuiteInConfig")
 	}
 }
 
@@ -1885,6 +1905,7 @@ func TestGetAlertingProviderByAlertType(t *testing.T) {
 	alertingConfig := &alerting.Config{
 		AWSSimpleEmailService: &awsses.AlertProvider{},
 		Custom:                &custom.AlertProvider{},
+		Datadog:               &datadog.AlertProvider{},
 		Discord:               &discord.AlertProvider{},
 		Email:                 &email.AlertProvider{},
 		Gitea:                 &gitea.AlertProvider{},
@@ -1892,19 +1913,35 @@ func TestGetAlertingProviderByAlertType(t *testing.T) {
 		GitLab:                &gitlab.AlertProvider{},
 		GoogleChat:            &googlechat.AlertProvider{},
 		Gotify:                &gotify.AlertProvider{},
+		HomeAssistant:         &homeassistant.AlertProvider{},
+		IFTTT:                 &ifttt.AlertProvider{},
+		Ilert:                 &ilert.AlertProvider{},
+		IncidentIO:            &incidentio.AlertProvider{},
 		JetBrainsSpace:        &jetbrainsspace.AlertProvider{},
+		Line:                  &line.AlertProvider{},
 		Matrix:                &matrix.AlertProvider{},
 		Mattermost:            &mattermost.AlertProvider{},
 		Messagebird:           &messagebird.AlertProvider{},
+		NewRelic:              &newrelic.AlertProvider{},
 		Ntfy:                  &ntfy.AlertProvider{},
 		Opsgenie:              &opsgenie.AlertProvider{},
 		PagerDuty:             &pagerduty.AlertProvider{},
+		Plivo:                 &plivo.AlertProvider{},
 		Pushover:              &pushover.AlertProvider{},
+		RocketChat:            &rocketchat.AlertProvider{},
+		SendGrid:              &sendgrid.AlertProvider{},
+		Signal:                &signal.AlertProvider{},
+		SIGNL4:                &signl4.AlertProvider{},
 		Slack:                 &slack.AlertProvider{},
+		Splunk:                &splunk.AlertProvider{},
+		Squadcast:             &squadcast.AlertProvider{},
 		Telegram:              &telegram.AlertProvider{},
 		Teams:                 &teams.AlertProvider{},
 		TeamsWorkflows:        &teamsworkflows.AlertProvider{},
 		Twilio:                &twilio.AlertProvider{},
+		Vonage:                &vonage.AlertProvider{},
+		Webex:                 &webex.AlertProvider{},
+		Zapier:                &zapier.AlertProvider{},
 		Zulip:                 &zulip.AlertProvider{},
 	}
 	scenarios := []struct {
@@ -1913,6 +1950,7 @@ func TestGetAlertingProviderByAlertType(t *testing.T) {
 	}{
 		{alertType: alert.TypeAWSSES, expected: alertingConfig.AWSSimpleEmailService},
 		{alertType: alert.TypeCustom, expected: alertingConfig.Custom},
+		{alertType: alert.TypeDatadog, expected: alertingConfig.Datadog},
 		{alertType: alert.TypeDiscord, expected: alertingConfig.Discord},
 		{alertType: alert.TypeEmail, expected: alertingConfig.Email},
 		{alertType: alert.TypeGitea, expected: alertingConfig.Gitea},
@@ -1920,19 +1958,35 @@ func TestGetAlertingProviderByAlertType(t *testing.T) {
 		{alertType: alert.TypeGitLab, expected: alertingConfig.GitLab},
 		{alertType: alert.TypeGoogleChat, expected: alertingConfig.GoogleChat},
 		{alertType: alert.TypeGotify, expected: alertingConfig.Gotify},
+		{alertType: alert.TypeHomeAssistant, expected: alertingConfig.HomeAssistant},
+		{alertType: alert.TypeIFTTT, expected: alertingConfig.IFTTT},
+		{alertType: alert.TypeIlert, expected: alertingConfig.Ilert},
+		{alertType: alert.TypeIncidentIO, expected: alertingConfig.IncidentIO},
 		{alertType: alert.TypeJetBrainsSpace, expected: alertingConfig.JetBrainsSpace},
+		{alertType: alert.TypeLine, expected: alertingConfig.Line},
 		{alertType: alert.TypeMatrix, expected: alertingConfig.Matrix},
 		{alertType: alert.TypeMattermost, expected: alertingConfig.Mattermost},
 		{alertType: alert.TypeMessagebird, expected: alertingConfig.Messagebird},
+		{alertType: alert.TypeNewRelic, expected: alertingConfig.NewRelic},
 		{alertType: alert.TypeNtfy, expected: alertingConfig.Ntfy},
 		{alertType: alert.TypeOpsgenie, expected: alertingConfig.Opsgenie},
 		{alertType: alert.TypePagerDuty, expected: alertingConfig.PagerDuty},
+		{alertType: alert.TypePlivo, expected: alertingConfig.Plivo},
 		{alertType: alert.TypePushover, expected: alertingConfig.Pushover},
+		{alertType: alert.TypeRocketChat, expected: alertingConfig.RocketChat},
+		{alertType: alert.TypeSendGrid, expected: alertingConfig.SendGrid},
+		{alertType: alert.TypeSignal, expected: alertingConfig.Signal},
+		{alertType: alert.TypeSIGNL4, expected: alertingConfig.SIGNL4},
 		{alertType: alert.TypeSlack, expected: alertingConfig.Slack},
+		{alertType: alert.TypeSplunk, expected: alertingConfig.Splunk},
+		{alertType: alert.TypeSquadcast, expected: alertingConfig.Squadcast},
 		{alertType: alert.TypeTelegram, expected: alertingConfig.Telegram},
 		{alertType: alert.TypeTeams, expected: alertingConfig.Teams},
 		{alertType: alert.TypeTeamsWorkflows, expected: alertingConfig.TeamsWorkflows},
 		{alertType: alert.TypeTwilio, expected: alertingConfig.Twilio},
+		{alertType: alert.TypeVonage, expected: alertingConfig.Vonage},
+		{alertType: alert.TypeWebex, expected: alertingConfig.Webex},
+		{alertType: alert.TypeZapier, expected: alertingConfig.Zapier},
 		{alertType: alert.TypeZulip, expected: alertingConfig.Zulip},
 	}
 	for _, scenario := range scenarios {
@@ -1943,3 +1997,683 @@ func TestGetAlertingProviderByAlertType(t *testing.T) {
 		})
 	}
 }
+
+func TestConfig_GetUniqueExtraMetricLabels(t *testing.T) {
+	tests := []struct {
+		name     string
+		config   *Config
+		expected []string
+	}{
+		{
+			name: "no-endpoints",
+			config: &Config{
+				Endpoints: []*endpoint.Endpoint{},
+			},
+			expected: []string{},
+		},
+		{
+			name: "single-endpoint-no-labels",
+			config: &Config{
+				Endpoints: []*endpoint.Endpoint{
+					{
+						Name: "endpoint1",
+						URL:  "https://example.com",
+					},
+				},
+			},
+			expected: []string{},
+		},
+		{
+			name: "single-endpoint-with-labels",
+			config: &Config{
+				Endpoints: []*endpoint.Endpoint{
+					{
+						Name:    "endpoint1",
+						URL:     "https://example.com",
+						Enabled: toPtr(true),
+						ExtraLabels: map[string]string{
+							"env":  "production",
+							"team": "backend",
+						},
+					},
+				},
+			},
+			expected: []string{"env", "team"},
+		},
+		{
+			name: "multiple-endpoints-with-labels",
+			config: &Config{
+				Endpoints: []*endpoint.Endpoint{
+					{
+						Name:    "endpoint1",
+						URL:     "https://example.com",
+						Enabled: toPtr(true),
+						ExtraLabels: map[string]string{
+							"env":    "production",
+							"team":   "backend",
+							"module": "auth",
+						},
+					},
+					{
+						Name:    "endpoint2",
+						URL:     "https://example.org",
+						Enabled: toPtr(true),
+						ExtraLabels: map[string]string{
+							"env":  "staging",
+							"team": "frontend",
+						},
+					},
+				},
+			},
+			expected: []string{"env", "team", "module"},
+		},
+		{
+			name: "multiple-endpoints-with-some-disabled",
+			config: &Config{
+				Endpoints: []*endpoint.Endpoint{
+					{
+						Name:    "endpoint1",
+						URL:     "https://example.com",
+						Enabled: toPtr(true),
+						ExtraLabels: map[string]string{
+							"env":  "production",
+							"team": "backend",
+						},
+					},
+					{
+						Name:    "endpoint2",
+						URL:     "https://example.org",
+						Enabled: toPtr(false),
+						ExtraLabels: map[string]string{
+							"module": "auth",
+						},
+					},
+				},
+			},
+			expected: []string{"env", "team"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			labels := tt.config.GetUniqueExtraMetricLabels()
+			if len(labels) != len(tt.expected) {
+				t.Errorf("expected %d labels, got %d", len(tt.expected), len(labels))
+			}
+			for _, label := range tt.expected {
+				if !contains(labels, label) {
+					t.Errorf("expected label %s to be present", label)
+				}
+			}
+		})
+	}
+}
+
+func TestParseAndValidateConfigBytesWithDuplicateKeysAcrossEntityTypes(t *testing.T) {
+	scenarios := []struct {
+		name        string
+		shouldError bool
+		expectedErr string
+		config      string
+	}{
+		{
+			name:        "endpoint-suite-same-key",
+			shouldError: true,
+			expectedErr: "duplicate key 'backend_test-api': suite 'backend_test-api' conflicts with endpoint 'backend_test-api'",
+			config: `
+endpoints:
+  - name: test-api
+    group: backend
+    url: https://example.com/api
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: test-api
+    group: backend
+    interval: 30s
+    endpoints:
+      - name: step1
+        url: https://example.com/test
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "endpoint-suite-different-keys",
+			shouldError: false,
+			config: `
+endpoints:
+  - name: api-service
+    group: backend
+    url: https://example.com/api
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: integration-tests
+    group: testing
+    interval: 30s
+    endpoints:
+      - name: step1
+        url: https://example.com/test
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "endpoint-external-endpoint-suite-unique-keys",
+			shouldError: false,
+			config: `
+endpoints:
+  - name: api-service
+    group: backend
+    url: https://example.com/api
+    conditions:
+      - "[STATUS] == 200"
+
+external-endpoints:
+  - name: monitoring-agent
+    group: infrastructure
+    token: "secret-token"
+    heartbeat:
+      interval: 5m
+
+suites:
+  - name: integration-tests
+    group: testing
+    interval: 30s
+    endpoints:
+      - name: step1
+        url: https://example.com/test
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "suite-with-same-key-as-external-endpoint",
+			shouldError: true,
+			expectedErr: "duplicate key 'monitoring_health-check': suite 'monitoring_health-check' conflicts with external endpoint 'monitoring_health-check'",
+			config: `
+endpoints:
+  - name: dummy
+    url: https://example.com/dummy
+    conditions:
+      - "[STATUS] == 200"
+
+external-endpoints:
+  - name: health-check
+    group: monitoring
+    token: "secret-token"
+    heartbeat:
+      interval: 5m
+
+suites:
+  - name: health-check
+    group: monitoring
+    interval: 30s
+    endpoints:
+      - name: step1
+        url: https://example.com/test
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "endpoint-with-same-name-as-suite-endpoint-different-groups",
+			shouldError: false,
+			config: `
+endpoints:
+  - name: api-health
+    group: backend
+    url: https://example.com/health
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: integration-suite
+    group: testing
+    interval: 30s
+    endpoints:
+      - name: api-health
+        url: https://example.com/api/health
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "endpoint-conflicting-with-suite-endpoint",
+			shouldError: true,
+			expectedErr: "duplicate key 'backend_api-health': endpoint 'backend_api-health' in suite 'backend_integration-suite' conflicts with endpoint 'backend_api-health'",
+			config: `
+endpoints:
+  - name: api-health
+    group: backend
+    url: https://example.com/health
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: integration-suite
+    group: backend
+    interval: 30s
+    endpoints:
+      - name: api-health
+        url: https://example.com/api/health
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+	}
+
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			_, err := parseAndValidateConfigBytes([]byte(scenario.config))
+			if scenario.shouldError {
+				if err == nil {
+					t.Error("should've returned an error")
+				} else if scenario.expectedErr != "" && err.Error() != scenario.expectedErr {
+					t.Errorf("expected error message '%s', got '%s'", scenario.expectedErr, err.Error())
+				}
+			} else if err != nil {
+				t.Errorf("shouldn't have returned an error, got: %v", err)
+			}
+		})
+	}
+}
+
+func TestParseAndValidateConfigBytesWithSuites(t *testing.T) {
+	scenarios := []struct {
+		name        string
+		shouldError bool
+		expectedErr string
+		config      string
+	}{
+		{
+			name:        "suite-with-no-name",
+			shouldError: true,
+			expectedErr: "invalid suite 'testing_': suite must have a name",
+			config: `
+endpoints:
+  - name: dummy
+    url: https://example.com/dummy
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - group: testing
+    interval: 30s
+    endpoints:
+      - name: step1
+        url: https://example.com/test
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "suite-with-no-endpoints",
+			shouldError: true,
+			expectedErr: "invalid suite 'testing_empty-suite': suite must have at least one endpoint",
+			config: `
+endpoints:
+  - name: dummy
+    url: https://example.com/dummy
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: empty-suite
+    group: testing
+    interval: 30s
+    endpoints: []`,
+		},
+		{
+			name:        "suite-with-duplicate-endpoint-names",
+			shouldError: true,
+			expectedErr: "invalid suite 'testing_duplicate-test': suite cannot have duplicate endpoint names: duplicate endpoint name 'step1'",
+			config: `
+endpoints:
+  - name: dummy
+    url: https://example.com/dummy
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: duplicate-test
+    group: testing
+    interval: 30s
+    endpoints:
+      - name: step1
+        url: https://example.com/test1
+        conditions:
+          - "[STATUS] == 200"
+      - name: step1
+        url: https://example.com/test2
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "suite-with-invalid-negative-timeout",
+			shouldError: true,
+			expectedErr: "invalid suite 'testing_negative-timeout-suite': suite timeout must be positive",
+			config: `
+endpoints:
+  - name: dummy
+    url: https://example.com/dummy
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: negative-timeout-suite
+    group: testing
+    interval: 30s
+    timeout: -5m
+    endpoints:
+      - name: step1
+        url: https://example.com/test
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "valid-suite-with-defaults",
+			shouldError: false,
+			config: `
+endpoints:
+  - name: api-service
+    group: backend
+    url: https://example.com/api
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: integration-test
+    group: testing
+    endpoints:
+      - name: step1
+        url: https://example.com/test
+        conditions:
+          - "[STATUS] == 200"
+      - name: step2
+        url: https://example.com/validate
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "valid-suite-with-all-fields",
+			shouldError: false,
+			config: `
+endpoints:
+  - name: api-service
+    group: backend
+    url: https://example.com/api
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: full-integration-test
+    group: testing
+    enabled: true
+    interval: 15m
+    timeout: 10m
+    context:
+      base_url: "https://example.com"
+      user_id: 12345
+    endpoints:
+      - name: authentication
+        url: https://example.com/auth
+        conditions:
+          - "[STATUS] == 200"
+      - name: user-profile
+        url: https://example.com/profile
+        conditions:
+          - "[STATUS] == 200"
+          - "[BODY].user_id == 12345"`,
+		},
+		{
+			name:        "valid-suite-with-endpoint-inheritance",
+			shouldError: false,
+			config: `
+endpoints:
+  - name: api-service
+    group: backend
+    url: https://example.com/api
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: inheritance-test
+    group: parent-group
+    endpoints:
+      - name: child-endpoint
+        url: https://example.com/test
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+		{
+			name:        "valid-suite-with-store-functionality",
+			shouldError: false,
+			config: `
+endpoints:
+  - name: api-service
+    group: backend
+    url: https://example.com/api
+    conditions:
+      - "[STATUS] == 200"
+
+suites:
+  - name: store-test
+    group: testing
+    endpoints:
+      - name: get-token
+        url: https://example.com/auth
+        conditions:
+          - "[STATUS] == 200"
+        store:
+          auth_token: "[BODY].token"
+      - name: use-token
+        url: https://example.com/data
+        headers:
+          Authorization: "Bearer {auth_token}"
+        conditions:
+          - "[STATUS] == 200"`,
+		},
+	}
+
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			_, err := parseAndValidateConfigBytes([]byte(scenario.config))
+			if scenario.shouldError {
+				if err == nil {
+					t.Error("should've returned an error")
+				} else if scenario.expectedErr != "" && err.Error() != scenario.expectedErr {
+					t.Errorf("expected error message '%s', got '%s'", scenario.expectedErr, err.Error())
+				}
+			} else if err != nil {
+				t.Errorf("shouldn't have returned an error, got: %v", err)
+			}
+		})
+	}
+}
+
+func TestValidateTunnelingConfig(t *testing.T) {
+	tests := []struct {
+		name    string
+		config  *Config
+		wantErr bool
+		errMsg  string
+	}{
+		{
+			name: "valid tunneling config",
+			config: &Config{
+				Tunneling: &tunneling.Config{
+					Tunnels: map[string]*sshtunnel.Config{
+						"test": {
+							Type:     "SSH",
+							Host:     "example.com",
+							Username: "test",
+							Password: "secret",
+						},
+					},
+				},
+				Endpoints: []*endpoint.Endpoint{
+					{
+						Name: "test-endpoint",
+						URL:  "http://example.com/health",
+						ClientConfig: &client.Config{
+							Tunnel: "test",
+						},
+						Conditions: []endpoint.Condition{"[STATUS] == 200"},
+					},
+				},
+			},
+			wantErr: false,
+		},
+		{
+			name: "invalid tunnel reference in endpoint",
+			config: &Config{
+				Tunneling: &tunneling.Config{
+					Tunnels: map[string]*sshtunnel.Config{
+						"test": {
+							Type:     "SSH",
+							Host:     "example.com",
+							Username: "test",
+							Password: "secret",
+						},
+					},
+				},
+				Endpoints: []*endpoint.Endpoint{
+					{
+						Name: "test-endpoint",
+						URL:  "http://example.com/health",
+						ClientConfig: &client.Config{
+							Tunnel: "nonexistent",
+						},
+						Conditions: []endpoint.Condition{"[STATUS] == 200"},
+					},
+				},
+			},
+			wantErr: true,
+			errMsg:  "endpoint '_test-endpoint': tunnel 'nonexistent' not found in tunneling configuration",
+		},
+		{
+			name: "invalid tunnel reference in suite endpoint",
+			config: &Config{
+				Tunneling: &tunneling.Config{
+					Tunnels: map[string]*sshtunnel.Config{
+						"test": {
+							Type:     "SSH",
+							Host:     "example.com",
+							Username: "test",
+							Password: "secret",
+						},
+					},
+				},
+				Suites: []*suite.Suite{
+					{
+						Name: "test-suite",
+						Endpoints: []*endpoint.Endpoint{
+							{
+								Name: "suite-endpoint",
+								URL:  "http://example.com/health",
+								ClientConfig: &client.Config{
+									Tunnel: "invalid",
+								},
+								Conditions: []endpoint.Condition{"[STATUS] == 200"},
+							},
+						},
+					},
+				},
+			},
+			wantErr: true,
+			errMsg:  "suite '_test-suite' endpoint '_suite-endpoint': tunnel 'invalid' not found in tunneling configuration",
+		},
+		{
+			name: "no tunneling config",
+			config: &Config{
+				Endpoints: []*endpoint.Endpoint{
+					{
+						Name:       "test-endpoint",
+						URL:        "http://example.com/health",
+						Conditions: []endpoint.Condition{"[STATUS] == 200"},
+					},
+				},
+			},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := ValidateTunnelingConfig(tt.config)
+			if tt.wantErr {
+				if err == nil {
+					t.Error("ValidateTunnelingConfig() expected error but got none")
+					return
+				}
+				if err.Error() != tt.errMsg {
+					t.Errorf("ValidateTunnelingConfig() error = %v, want %v", err.Error(), tt.errMsg)
+				}
+				return
+			}
+			if err != nil {
+				t.Errorf("ValidateTunnelingConfig() unexpected error = %v", err)
+			}
+		})
+	}
+}
+
+func TestResolveTunnelForClientConfig(t *testing.T) {
+	config := &Config{
+		Tunneling: &tunneling.Config{
+			Tunnels: map[string]*sshtunnel.Config{
+				"test": {
+					Type:     "SSH",
+					Host:     "example.com",
+					Username: "test",
+					Password: "secret",
+				},
+			},
+		},
+	}
+	err := config.Tunneling.ValidateAndSetDefaults()
+	if err != nil {
+		t.Fatalf("Failed to validate tunnel config: %v", err)
+	}
+	tests := []struct {
+		name         string
+		clientConfig *client.Config
+		wantErr      bool
+		errMsg       string
+	}{
+		{
+			name: "valid tunnel reference",
+			clientConfig: &client.Config{
+				Tunnel: "test",
+			},
+			wantErr: false,
+		},
+		{
+			name: "invalid tunnel reference",
+			clientConfig: &client.Config{
+				Tunnel: "nonexistent",
+			},
+			wantErr: true,
+			errMsg:  "tunnel 'nonexistent' not found in tunneling configuration",
+		},
+		{
+			name:         "no tunnel reference",
+			clientConfig: &client.Config{},
+			wantErr:      false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := resolveTunnelForClientConfig(config, tt.clientConfig)
+			if tt.wantErr {
+				if err == nil {
+					t.Error("resolveTunnelForClientConfig() expected error but got none")
+					return
+				}
+				if err.Error() != tt.errMsg {
+					t.Errorf("resolveTunnelForClientConfig() error = %v, want %v", err.Error(), tt.errMsg)
+				}
+				return
+			}
+			if err != nil {
+				t.Errorf("resolveTunnelForClientConfig() unexpected error = %v", err)
+			}
+		})
+	}
+}

config/endpoint/condition.go

@@ -7,82 +7,11 @@ import (
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v5/jsonpath"
+	"github.com/TwiN/gatus/v5/config/gontext"
 	"github.com/TwiN/gatus/v5/pattern"
 )
 
-// Placeholders
 const (
-	// StatusPlaceholder is a placeholder for a HTTP status.
-	//
-	// Values that could replace the placeholder: 200, 404, 500, ...
-	StatusPlaceholder = "[STATUS]"
-
-	// IPPlaceholder is a placeholder for an IP.
-	//
-	// Values that could replace the placeholder: 127.0.0.1, 10.0.0.1, ...
-	IPPlaceholder = "[IP]"
-
-	// DNSRCodePlaceholder is a placeholder for DNS_RCODE
-	//
-	// Values that could replace the placeholder: NOERROR, FORMERR, SERVFAIL, NXDOMAIN, NOTIMP, REFUSED
-	DNSRCodePlaceholder = "[DNS_RCODE]"
-
-	// ResponseTimePlaceholder is a placeholder for the request response time, in milliseconds.
-	//
-	// Values that could replace the placeholder: 1, 500, 1000, ...
-	ResponseTimePlaceholder = "[RESPONSE_TIME]"
-
-	// BodyPlaceholder is a placeholder for the Body of the response
-	//
-	// Values that could replace the placeholder: {}, {"data":{"name":"john"}}, ...
-	BodyPlaceholder = "[BODY]"
-
-	// ConnectedPlaceholder is a placeholder for whether a connection was successfully established.
-	//
-	// Values that could replace the placeholder: true, false
-	ConnectedPlaceholder = "[CONNECTED]"
-
-	// CertificateExpirationPlaceholder is a placeholder for the duration before certificate expiration, in milliseconds.
-	//
-	// Values that could replace the placeholder: 4461677039 (~52 days)
-	CertificateExpirationPlaceholder = "[CERTIFICATE_EXPIRATION]"
-
-	// DomainExpirationPlaceholder is a placeholder for the duration before the domain expires, in milliseconds.
-	DomainExpirationPlaceholder = "[DOMAIN_EXPIRATION]"
-)
-
-// Functions
-const (
-	// LengthFunctionPrefix is the prefix for the length function
-	//
-	// Usage: len([BODY].articles) == 10, len([BODY].name) > 5
-	LengthFunctionPrefix = "len("
-
-	// HasFunctionPrefix is the prefix for the has function
-	//
-	// Usage: has([BODY].errors) == true
-	HasFunctionPrefix = "has("
-
-	// PatternFunctionPrefix is the prefix for the pattern function
-	//
-	// Usage: [IP] == pat(192.168.*.*)
-	PatternFunctionPrefix = "pat("
-
-	// AnyFunctionPrefix is the prefix for the any function
-	//
-	// Usage: [IP] == any(1.1.1.1, 1.0.0.1)
-	AnyFunctionPrefix = "any("
-
-	// FunctionSuffix is the suffix for all functions
-	FunctionSuffix = ")"
-)
-
-// Other constants
-const (
-	// InvalidConditionElementSuffix is the suffix that will be appended to an invalid condition
-	InvalidConditionElementSuffix = "(INVALID)"
-
 	// maximumLengthBeforeTruncatingWhenComparedWithPattern is the maximum length an element being compared to a
 	// pattern can have.
 	//
@@ -97,50 +26,50 @@ type Condition string
 // Validate checks if the Condition is valid
 func (c Condition) Validate() error {
 	r := &Result{}
-	c.evaluate(r, false)
+	c.evaluate(r, false, nil)
 	if len(r.Errors) != 0 {
 		return errors.New(r.Errors[0])
 	}
 	return nil
 }
 
-// evaluate the Condition with the Result of the health check
-func (c Condition) evaluate(result *Result, dontResolveFailedConditions bool) bool {
+// evaluate the Condition with the Result and an optional context
+func (c Condition) evaluate(result *Result, dontResolveFailedConditions bool, context *gontext.Gontext) bool {
 	condition := string(c)
 	success := false
 	conditionToDisplay := condition
 	if strings.Contains(condition, " == ") {
-		parameters, resolvedParameters := sanitizeAndResolve(strings.Split(condition, " == "), result)
+		parameters, resolvedParameters := sanitizeAndResolveWithContext(strings.Split(condition, " == "), result, context)
 		success = isEqual(resolvedParameters[0], resolvedParameters[1])
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettify(parameters, resolvedParameters, "==")
 		}
 	} else if strings.Contains(condition, " != ") {
-		parameters, resolvedParameters := sanitizeAndResolve(strings.Split(condition, " != "), result)
+		parameters, resolvedParameters := sanitizeAndResolveWithContext(strings.Split(condition, " != "), result, context)
 		success = !isEqual(resolvedParameters[0], resolvedParameters[1])
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettify(parameters, resolvedParameters, "!=")
 		}
 	} else if strings.Contains(condition, " <= ") {
-		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, " <= "), result)
+		parameters, resolvedParameters := sanitizeAndResolveNumericalWithContext(strings.Split(condition, " <= "), result, context)
 		success = resolvedParameters[0] <= resolvedParameters[1]
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, "<=")
 		}
 	} else if strings.Contains(condition, " >= ") {
-		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, " >= "), result)
+		parameters, resolvedParameters := sanitizeAndResolveNumericalWithContext(strings.Split(condition, " >= "), result, context)
 		success = resolvedParameters[0] >= resolvedParameters[1]
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, ">=")
 		}
 	} else if strings.Contains(condition, " > ") {
-		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, " > "), result)
+		parameters, resolvedParameters := sanitizeAndResolveNumericalWithContext(strings.Split(condition, " > "), result, context)
 		success = resolvedParameters[0] > resolvedParameters[1]
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, ">")
 		}
 	} else if strings.Contains(condition, " < ") {
-		parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, " < "), result)
+		parameters, resolvedParameters := sanitizeAndResolveNumericalWithContext(strings.Split(condition, " < "), result, context)
 		success = resolvedParameters[0] < resolvedParameters[1]
 		if !success && !dontResolveFailedConditions {
 			conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, "<")
@@ -235,79 +164,29 @@ func isEqual(first, second string) bool {
 	return first == second
 }
 
-// sanitizeAndResolve sanitizes and resolves a list of elements and returns the list of parameters as well as a list
-// of resolved parameters
-func sanitizeAndResolve(elements []string, result *Result) ([]string, []string) {
+// sanitizeAndResolveWithContext sanitizes and resolves a list of elements with an optional context
+func sanitizeAndResolveWithContext(elements []string, result *Result, context *gontext.Gontext) ([]string, []string) {
 	parameters := make([]string, len(elements))
 	resolvedParameters := make([]string, len(elements))
-	body := strings.TrimSpace(string(result.Body))
 	for i, element := range elements {
 		element = strings.TrimSpace(element)
 		parameters[i] = element
-		switch strings.ToUpper(element) {
-		case StatusPlaceholder:
-			element = strconv.Itoa(result.HTTPStatus)
-		case IPPlaceholder:
-			element = result.IP
-		case ResponseTimePlaceholder:
-			element = strconv.Itoa(int(result.Duration.Milliseconds()))
-		case BodyPlaceholder:
-			element = body
-		case DNSRCodePlaceholder:
-			element = result.DNSRCode
-		case ConnectedPlaceholder:
-			element = strconv.FormatBool(result.Connected)
-		case CertificateExpirationPlaceholder:
-			element = strconv.FormatInt(result.CertificateExpiration.Milliseconds(), 10)
-		case DomainExpirationPlaceholder:
-			element = strconv.FormatInt(result.DomainExpiration.Milliseconds(), 10)
-		default:
-			// if contains the BodyPlaceholder, then evaluate json path
-			if strings.Contains(element, BodyPlaceholder) {
-				checkingForLength := false
-				checkingForExistence := false
-				if strings.HasPrefix(element, LengthFunctionPrefix) && strings.HasSuffix(element, FunctionSuffix) {
-					checkingForLength = true
-					element = strings.TrimSuffix(strings.TrimPrefix(element, LengthFunctionPrefix), FunctionSuffix)
-				}
-				if strings.HasPrefix(element, HasFunctionPrefix) && strings.HasSuffix(element, FunctionSuffix) {
-					checkingForExistence = true
-					element = strings.TrimSuffix(strings.TrimPrefix(element, HasFunctionPrefix), FunctionSuffix)
-				}
-				resolvedElement, resolvedElementLength, err := jsonpath.Eval(strings.TrimPrefix(strings.TrimPrefix(element, BodyPlaceholder), "."), result.Body)
-				if checkingForExistence {
-					if err != nil {
-						element = "false"
-					} else {
-						element = "true"
-					}
-				} else {
-					if err != nil {
-						if err.Error() != "unexpected end of JSON input" {
-							result.AddError(err.Error())
-						}
-						if checkingForLength {
-							element = LengthFunctionPrefix + element + FunctionSuffix + " " + InvalidConditionElementSuffix
-						} else {
-							element = element + " " + InvalidConditionElementSuffix
-						}
-					} else {
-						if checkingForLength {
-							element = strconv.Itoa(resolvedElementLength)
-						} else {
-							element = resolvedElement
-						}
-					}
-				}
-			}
+
+		// Use the unified ResolvePlaceholder function
+		resolved, err := ResolvePlaceholder(element, result, context)
+		if err != nil {
+			// If there's an error, add it to the result
+			result.AddError(err.Error())
+			resolvedParameters[i] = element + " " + InvalidConditionElementSuffix
+		} else {
+			resolvedParameters[i] = resolved
 		}
-		resolvedParameters[i] = element
 	}
 	return parameters, resolvedParameters
 }
 
-func sanitizeAndResolveNumerical(list []string, result *Result) (parameters []string, resolvedNumericalParameters []int64) {
-	parameters, resolvedParameters := sanitizeAndResolve(list, result)
+func sanitizeAndResolveNumericalWithContext(list []string, result *Result, context *gontext.Gontext) (parameters []string, resolvedNumericalParameters []int64) {
+	parameters, resolvedParameters := sanitizeAndResolveWithContext(list, result, context)
 	for _, element := range resolvedParameters {
 		if duration, err := time.ParseDuration(element); duration != 0 && err == nil {
 			// If the string is a duration, convert it to milliseconds
@@ -335,30 +214,35 @@ func prettifyNumericalParameters(parameters []string, resolvedParameters []int64
 
 // prettify returns a string representation of a condition with its parameters resolved between parentheses
 func prettify(parameters []string, resolvedParameters []string, operator string) string {
-	// Since, in the event of an invalid path, the resolvedParameters also contain the condition itself,
-	// we'll return the resolvedParameters as-is.
-	if strings.HasSuffix(resolvedParameters[0], InvalidConditionElementSuffix) || strings.HasSuffix(resolvedParameters[1], InvalidConditionElementSuffix) {
-		return resolvedParameters[0] + " " + operator + " " + resolvedParameters[1]
-	}
-	// If using the pattern function, truncate the parameter it's being compared to if said parameter is long enough
+	// Handle pattern function truncation first
 	if strings.HasPrefix(parameters[0], PatternFunctionPrefix) && strings.HasSuffix(parameters[0], FunctionSuffix) && len(resolvedParameters[1]) > maximumLengthBeforeTruncatingWhenComparedWithPattern {
 		resolvedParameters[1] = fmt.Sprintf("%.25s...(truncated)", resolvedParameters[1])
 	}
 	if strings.HasPrefix(parameters[1], PatternFunctionPrefix) && strings.HasSuffix(parameters[1], FunctionSuffix) && len(resolvedParameters[0]) > maximumLengthBeforeTruncatingWhenComparedWithPattern {
 		resolvedParameters[0] = fmt.Sprintf("%.25s...(truncated)", resolvedParameters[0])
 	}
-	// First element is a placeholder
-	if parameters[0] != resolvedParameters[0] && parameters[1] == resolvedParameters[1] {
-		return parameters[0] + " (" + resolvedParameters[0] + ") " + operator + " " + parameters[1]
+	// Determine the state of each parameter
+	leftChanged := parameters[0] != resolvedParameters[0]
+	rightChanged := parameters[1] != resolvedParameters[1]
+	leftInvalid := resolvedParameters[0] == parameters[0]+" "+InvalidConditionElementSuffix
+	rightInvalid := resolvedParameters[1] == parameters[1]+" "+InvalidConditionElementSuffix
+	// Build the output based on what was resolved
+	var left, right string
+	// Format left side
+	if leftChanged && !leftInvalid {
+		left = parameters[0] + " (" + resolvedParameters[0] + ")"
+	} else if leftInvalid {
+		left = resolvedParameters[0] // Already has (INVALID)
+	} else {
+		left = parameters[0] // Unchanged
 	}
-	// Second element is a placeholder
-	if parameters[0] == resolvedParameters[0] && parameters[1] != resolvedParameters[1] {
-		return parameters[0] + " " + operator + " " + parameters[1] + " (" + resolvedParameters[1] + ")"
+	// Format right side
+	if rightChanged && !rightInvalid {
+		right = parameters[1] + " (" + resolvedParameters[1] + ")"
+	} else if rightInvalid {
+		right = resolvedParameters[1] // Already has (INVALID)
+	} else {
+		right = parameters[1] // Unchanged
 	}
-	// Both elements are placeholders...?
-	if parameters[0] != resolvedParameters[0] && parameters[1] != resolvedParameters[1] {
-		return parameters[0] + " (" + resolvedParameters[0] + ") " + operator + " " + parameters[1] + " (" + resolvedParameters[1] + ")"
-	}
-	// Neither elements are placeholders
-	return parameters[0] + " " + operator + " " + parameters[1]
+	return left + " " + operator + " " + right
 }

config/endpoint/condition_bench_test.go

@@ -8,7 +8,7 @@ func BenchmarkCondition_evaluateWithBodyStringAny(b *testing.B) {
 	condition := Condition("[BODY].name == any(john.doe, jane.doe)")
 	for n := 0; n < b.N; n++ {
 		result := &Result{Body: []byte("{\"name\": \"john.doe\"}")}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }
@@ -17,7 +17,7 @@ func BenchmarkCondition_evaluateWithBodyStringAnyFailure(b *testing.B) {
 	condition := Condition("[BODY].name == any(john.doe, jane.doe)")
 	for n := 0; n < b.N; n++ {
 		result := &Result{Body: []byte("{\"name\": \"bob.doe\"}")}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }
@@ -26,7 +26,7 @@ func BenchmarkCondition_evaluateWithBodyString(b *testing.B) {
 	condition := Condition("[BODY].name == john.doe")
 	for n := 0; n < b.N; n++ {
 		result := &Result{Body: []byte("{\"name\": \"john.doe\"}")}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }
@@ -35,7 +35,7 @@ func BenchmarkCondition_evaluateWithBodyStringFailure(b *testing.B) {
 	condition := Condition("[BODY].name == john.doe")
 	for n := 0; n < b.N; n++ {
 		result := &Result{Body: []byte("{\"name\": \"bob.doe\"}")}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }
@@ -44,7 +44,7 @@ func BenchmarkCondition_evaluateWithBodyStringFailureInvalidPath(b *testing.B) {
 	condition := Condition("[BODY].user.name == bob.doe")
 	for n := 0; n < b.N; n++ {
 		result := &Result{Body: []byte("{\"name\": \"bob.doe\"}")}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }
@@ -53,7 +53,7 @@ func BenchmarkCondition_evaluateWithBodyStringLen(b *testing.B) {
 	condition := Condition("len([BODY].name) == 8")
 	for n := 0; n < b.N; n++ {
 		result := &Result{Body: []byte("{\"name\": \"john.doe\"}")}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }
@@ -62,7 +62,7 @@ func BenchmarkCondition_evaluateWithBodyStringLenFailure(b *testing.B) {
 	condition := Condition("len([BODY].name) == 8")
 	for n := 0; n < b.N; n++ {
 		result := &Result{Body: []byte("{\"name\": \"bob.doe\"}")}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }
@@ -71,7 +71,7 @@ func BenchmarkCondition_evaluateWithStatus(b *testing.B) {
 	condition := Condition("[STATUS] == 200")
 	for n := 0; n < b.N; n++ {
 		result := &Result{HTTPStatus: 200}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }
@@ -80,7 +80,7 @@ func BenchmarkCondition_evaluateWithStatusFailure(b *testing.B) {
 	condition := Condition("[STATUS] == 200")
 	for n := 0; n < b.N; n++ {
 		result := &Result{HTTPStatus: 400}
-		condition.evaluate(result, false)
+		condition.evaluate(result, false, nil)
 	}
 	b.ReportAllocs()
 }

config/endpoint/condition_test.go

@@ -6,6 +6,8 @@ import (
 	"strconv"
 	"testing"
 	"time"
+
+	"github.com/TwiN/gatus/v5/config/gontext"
 )
 
 func TestCondition_Validate(t *testing.T) {
@@ -755,7 +757,7 @@ func TestCondition_evaluate(t *testing.T) {
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {
-			scenario.Condition.evaluate(scenario.Result, scenario.DontResolveFailedConditions)
+			scenario.Condition.evaluate(scenario.Result, scenario.DontResolveFailedConditions, nil)
 			if scenario.Result.ConditionResults[0].Success != scenario.ExpectedSuccess {
 				t.Errorf("Condition '%s' should have been success=%v", scenario.Condition, scenario.ExpectedSuccess)
 			}
@@ -769,7 +771,7 @@ func TestCondition_evaluate(t *testing.T) {
 func TestCondition_evaluateWithInvalidOperator(t *testing.T) {
 	condition := Condition("[STATUS] ? 201")
 	result := &Result{HTTPStatus: 201}
-	condition.evaluate(result, false)
+	condition.evaluate(result, false, nil)
 	if result.Success {
 		t.Error("condition was invalid, result should've been a failure")
 	}
@@ -777,3 +779,77 @@ func TestCondition_evaluateWithInvalidOperator(t *testing.T) {
 		t.Error("condition was invalid, result should've had an error")
 	}
 }
+
+func TestConditionEvaluateWithInvalidContextPlaceholder(t *testing.T) {
+	// Test case: Suite endpoint with invalid context placeholder
+	// This should display the original placeholder names with resolved values
+	condition := Condition("[STATUS] == [CONTEXT].expected_statusz")
+	result := &Result{HTTPStatus: 200}
+	ctx := gontext.New(map[string]interface{}{
+		// Note: expected_statusz is not in the context (typo - should be expected_status)
+		"expected_status":   200,
+		"max_response_time": 5000,
+	})
+	// Simulate suite endpoint evaluation with context
+	success := condition.evaluate(result, false, ctx) // false = don't skip resolution (default)
+	if success {
+		t.Error("Condition should have failed because [CONTEXT].expected_statusz doesn't exist")
+	}
+	if len(result.ConditionResults) == 0 {
+		t.Fatal("No condition results found")
+	}
+	actualDisplay := result.ConditionResults[0].Condition
+	// The expected format should preserve the placeholder names
+	expectedDisplay := "[STATUS] (200) == [CONTEXT].expected_statusz (INVALID)"
+	if actualDisplay != expectedDisplay {
+		t.Errorf("Incorrect condition display for failed context placeholder\nExpected: %s\nActual:   %s", expectedDisplay, actualDisplay)
+	}
+}
+
+func TestConditionEvaluateWithValidContextPlaceholder(t *testing.T) {
+	// Test case: Suite endpoint with valid context placeholder
+	condition := Condition("[STATUS] == [CONTEXT].expected_status")
+	result := &Result{HTTPStatus: 200}
+	ctx := gontext.New(map[string]interface{}{
+		"expected_status": 200,
+	})
+	// Simulate suite endpoint evaluation with context
+	success := condition.evaluate(result, false, ctx)
+	if !success {
+		t.Error("Condition should have succeeded")
+	}
+	if len(result.ConditionResults) == 0 {
+		t.Fatal("No condition results found")
+	}
+	actualDisplay := result.ConditionResults[0].Condition
+	// For successful conditions, just the original condition is shown
+	expectedDisplay := "[STATUS] == [CONTEXT].expected_status"
+	if actualDisplay != expectedDisplay {
+		t.Errorf("Incorrect condition display for successful context placeholder\nExpected: %s\nActual:   %s", expectedDisplay, actualDisplay)
+	}
+}
+
+func TestConditionEvaluateWithMixedValidAndInvalidContext(t *testing.T) {
+	// Test case: One valid placeholder, one invalid
+	// Note: For numerical comparisons, invalid placeholders that can't be parsed as numbers
+	// default to 0 due to sanitizeAndResolveNumericalWithContext's behavior
+	condition := Condition("[RESPONSE_TIME] < [CONTEXT].invalid_key")
+	result := &Result{Duration: 100 * 1000000} // 100ms in nanoseconds
+	ctx := gontext.New(map[string]interface{}{
+		"valid_key": 5000,
+	})
+	// Simulate suite endpoint evaluation with context
+	success := condition.evaluate(result, false, ctx)
+	if success {
+		t.Error("Condition should have failed because [CONTEXT].invalid_key doesn't exist")
+	}
+	if len(result.ConditionResults) == 0 {
+		t.Fatal("No condition results found")
+	}
+	actualDisplay := result.ConditionResults[0].Condition
+	// For numerical comparisons, invalid context placeholders become 0
+	expectedDisplay := "[RESPONSE_TIME] (100) < [CONTEXT].invalid_key (0)"
+	if actualDisplay != expectedDisplay {
+		t.Errorf("Incorrect condition display\nExpected: %s\nActual:   %s", expectedDisplay, actualDisplay)
+	}
+}

config/endpoint/endpoint.go

@@ -21,6 +21,8 @@ import (
 	"github.com/TwiN/gatus/v5/config/endpoint/dns"
 	sshconfig "github.com/TwiN/gatus/v5/config/endpoint/ssh"
 	"github.com/TwiN/gatus/v5/config/endpoint/ui"
+	"github.com/TwiN/gatus/v5/config/gontext"
+	"github.com/TwiN/gatus/v5/config/key"
 	"github.com/TwiN/gatus/v5/config/maintenance"
 	"golang.org/x/crypto/ssh"
 )
@@ -99,6 +101,9 @@ type Endpoint struct {
 	// Headers of the request
 	Headers map[string]string `yaml:"headers,omitempty"`
 
+	// ExtraLabels are key-value pairs that can be used to metric the endpoint
+	ExtraLabels map[string]string `yaml:"extra-labels,omitempty"`
+
 	// Interval is the duration to wait between every status check
 	Interval time.Duration `yaml:"interval,omitempty"`
 
@@ -128,6 +133,21 @@ type Endpoint struct {
 
 	// NumberOfSuccessesInARow is the number of successful evaluations in a row
 	NumberOfSuccessesInARow int `yaml:"-"`
+
+	// LastReminderSent is the time at which the last reminder was sent for this endpoint.
+	LastReminderSent time.Time `yaml:"-"`
+
+	///////////////////////
+	// SUITE-ONLY FIELDS //
+	///////////////////////
+
+	// Store is a map of values to extract from the result and store in the suite context
+	// This field is only used when the endpoint is part of a suite
+	Store map[string]string `yaml:"store,omitempty"`
+
+	// AlwaysRun defines whether to execute this endpoint even if previous endpoints in the suite failed
+	// This field is only used when the endpoint is part of a suite
+	AlwaysRun bool `yaml:"always-run,omitempty"`
 }
 
 // IsEnabled returns whether the endpoint is enabled or not
@@ -249,7 +269,7 @@ func (e *Endpoint) DisplayName() string {
 
 // Key returns the unique key for the Endpoint
 func (e *Endpoint) Key() string {
-	return ConvertGroupAndEndpointNameToKey(e.Group, e.Name)
+	return key.ConvertGroupAndNameToKey(e.Group, e.Name)
 }
 
 // Close HTTP connections between watchdog and endpoints to avoid dangling socket file descriptors
@@ -263,16 +283,26 @@ func (e *Endpoint) Close() {
 
 // EvaluateHealth sends a request to the endpoint's URL and evaluates the conditions of the endpoint.
 func (e *Endpoint) EvaluateHealth() *Result {
+	return e.EvaluateHealthWithContext(nil)
+}
+
+// EvaluateHealthWithContext sends a request to the endpoint's URL with context support and evaluates the conditions
+func (e *Endpoint) EvaluateHealthWithContext(context *gontext.Gontext) *Result {
 	result := &Result{Success: true, Errors: []string{}}
+	// Preprocess the endpoint with context if provided
+	processedEndpoint := e
+	if context != nil {
+		processedEndpoint = e.preprocessWithContext(result, context)
+	}
 	// Parse or extract hostname from URL
-	if e.DNSConfig != nil {
-		result.Hostname = strings.TrimSuffix(e.URL, ":53")
-	} else if e.Type() == TypeICMP {
+	if processedEndpoint.DNSConfig != nil {
+		result.Hostname = strings.TrimSuffix(processedEndpoint.URL, ":53")
+	} else if processedEndpoint.Type() == TypeICMP {
 		// To handle IPv6 addresses, we need to handle the hostname differently here. This is to avoid, for instance,
 		// "1111:2222:3333::4444" being displayed as "1111:2222:3333:" because :4444 would be interpreted as a port.
-		result.Hostname = strings.TrimPrefix(e.URL, "icmp://")
+		result.Hostname = strings.TrimPrefix(processedEndpoint.URL, "icmp://")
 	} else {
-		urlObject, err := url.Parse(e.URL)
+		urlObject, err := url.Parse(processedEndpoint.URL)
 		if err != nil {
 			result.AddError(err.Error())
 		} else {
@@ -281,11 +311,11 @@ func (e *Endpoint) EvaluateHealth() *Result {
 		}
 	}
 	// Retrieve IP if necessary
-	if e.needsToRetrieveIP() {
-		e.getIP(result)
+	if processedEndpoint.needsToRetrieveIP() {
+		processedEndpoint.getIP(result)
 	}
 	// Retrieve domain expiration if necessary
-	if e.needsToRetrieveDomainExpiration() && len(result.Hostname) > 0 {
+	if processedEndpoint.needsToRetrieveDomainExpiration() && len(result.Hostname) > 0 {
 		var err error
 		if result.DomainExpiration, err = client.GetDomainExpiration(result.Hostname); err != nil {
 			result.AddError(err.Error())
@@ -293,42 +323,91 @@ func (e *Endpoint) EvaluateHealth() *Result {
 	}
 	// Call the endpoint (if there's no errors)
 	if len(result.Errors) == 0 {
-		e.call(result)
+		processedEndpoint.call(result)
 	} else {
 		result.Success = false
 	}
 	// Evaluate the conditions
-	for _, condition := range e.Conditions {
-		success := condition.evaluate(result, e.UIConfig.DontResolveFailedConditions)
+	for _, condition := range processedEndpoint.Conditions {
+		success := condition.evaluate(result, processedEndpoint.UIConfig.DontResolveFailedConditions, context)
 		if !success {
 			result.Success = false
 		}
 	}
 	result.Timestamp = time.Now()
 	// Clean up parameters that we don't need to keep in the results
-	if e.UIConfig.HideURL {
+	if processedEndpoint.UIConfig.HideURL {
 		for errIdx, errorString := range result.Errors {
-			result.Errors[errIdx] = strings.ReplaceAll(errorString, e.URL, "<redacted>")
+			result.Errors[errIdx] = strings.ReplaceAll(errorString, processedEndpoint.URL, "<redacted>")
 		}
 	}
-	if e.UIConfig.HideHostname {
+	if processedEndpoint.UIConfig.HideHostname {
 		for errIdx, errorString := range result.Errors {
 			result.Errors[errIdx] = strings.ReplaceAll(errorString, result.Hostname, "<redacted>")
 		}
 		result.Hostname = "" // remove it from the result so it doesn't get exposed
 	}
-	if e.UIConfig.HidePort && len(result.port) > 0 {
+	if processedEndpoint.UIConfig.HidePort && len(result.port) > 0 {
 		for errIdx, errorString := range result.Errors {
 			result.Errors[errIdx] = strings.ReplaceAll(errorString, result.port, "<redacted>")
 		}
 		result.port = ""
 	}
-	if e.UIConfig.HideConditions {
+	if processedEndpoint.UIConfig.HideConditions {
 		result.ConditionResults = nil
 	}
 	return result
 }
 
+// preprocessWithContext creates a copy of the endpoint with context placeholders replaced
+func (e *Endpoint) preprocessWithContext(result *Result, context *gontext.Gontext) *Endpoint {
+	// Create a deep copy of the endpoint
+	processed := &Endpoint{}
+	*processed = *e
+	var err error
+	// Replace context placeholders in URL
+	if processed.URL, err = replaceContextPlaceholders(e.URL, context); err != nil {
+		result.AddError(err.Error())
+	}
+	// Replace context placeholders in Body
+	if processed.Body, err = replaceContextPlaceholders(e.Body, context); err != nil {
+		result.AddError(err.Error())
+	}
+	// Replace context placeholders in Headers
+	if e.Headers != nil {
+		processed.Headers = make(map[string]string)
+		for k, v := range e.Headers {
+			if processed.Headers[k], err = replaceContextPlaceholders(v, context); err != nil {
+				result.AddError(err.Error())
+			}
+		}
+	}
+	return processed
+}
+
+// replaceContextPlaceholders replaces [CONTEXT].path placeholders with actual values
+func replaceContextPlaceholders(input string, ctx *gontext.Gontext) (string, error) {
+	if ctx == nil {
+		return input, nil
+	}
+	var contextErrors []string
+	contextRegex := regexp.MustCompile(`\[CONTEXT\]\.[\w\.\-]+`)
+	result := contextRegex.ReplaceAllStringFunc(input, func(match string) string {
+		// Extract the path after [CONTEXT].
+		path := strings.TrimPrefix(match, "[CONTEXT].")
+		value, err := ctx.Get(path)
+		if err != nil {
+			contextErrors = append(contextErrors, fmt.Sprintf("path '%s' not found", path))
+			return match // Keep placeholder for error reporting
+		}
+		return fmt.Sprintf("%v", value)
+	})
+	if len(contextErrors) > 0 {
+		return result, fmt.Errorf("context placeholder resolution failed: %s", strings.Join(contextErrors, ", "))
+	}
+	return result, nil
+}
+
 func (e *Endpoint) getParsedBody() string {
 	body := e.Body
 	body = strings.ReplaceAll(body, "[ENDPOINT_NAME]", e.Name)
@@ -338,6 +417,9 @@ func (e *Endpoint) getParsedBody() string {
 	if err == nil {
 		body = randRegex.ReplaceAllStringFunc(body, func(match string) string {
 			n, _ := strconv.Atoi(match[15 : len(match)-1])
+			if n > 8192 {
+				n = 8192 // Limit the length of the random string to 8192 bytes to avoid excessive memory usage
+			}
 			const availableCharacterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
 			b := make([]byte, n)
 			for i := range b {
@@ -417,8 +499,7 @@ func (e *Endpoint) call(result *Result) {
 	} else if endpointType == TypeSSH {
 		// If there's no username/password specified, attempt to validate just the SSH banner
 		if len(e.SSHConfig.Username) == 0 && len(e.SSHConfig.Password) == 0 {
-			result.Connected, result.HTTPStatus, err =
-				client.CheckSSHBanner(strings.TrimPrefix(e.URL, "ssh://"), e.ClientConfig)
+			result.Connected, result.HTTPStatus, err = client.CheckSSHBanner(strings.TrimPrefix(e.URL, "ssh://"), e.ClientConfig)
 			if err != nil {
 				result.AddError(err.Error())
 				return
@@ -484,13 +565,21 @@ func (e *Endpoint) buildHTTPRequest() *http.Request {
 	return request
 }
 
-// needsToReadBody checks if there's any condition that requires the response Body to be read
+// needsToReadBody checks if there's any condition or store mapping that requires the response Body to be read
 func (e *Endpoint) needsToReadBody() bool {
 	for _, condition := range e.Conditions {
 		if condition.hasBodyPlaceholder() {
 			return true
 		}
 	}
+	// Check store values for body placeholders
+	if e.Store != nil {
+		for _, value := range e.Store {
+			if strings.Contains(value, BodyPlaceholder) {
+				return true
+			}
+		}
+	}
 	return false
 }
 

config/endpoint/endpoint_test.go

@@ -16,6 +16,7 @@ import (
 	"github.com/TwiN/gatus/v5/config/endpoint/dns"
 	"github.com/TwiN/gatus/v5/config/endpoint/ssh"
 	"github.com/TwiN/gatus/v5/config/endpoint/ui"
+	"github.com/TwiN/gatus/v5/config/gontext"
 	"github.com/TwiN/gatus/v5/config/maintenance"
 	"github.com/TwiN/gatus/v5/test"
 )
@@ -913,6 +914,40 @@ func TestEndpoint_needsToReadBody(t *testing.T) {
 	if !(&Endpoint{Conditions: []Condition{bodyConditionWithLength, statusCondition}}).needsToReadBody() {
 		t.Error("expected true, got false")
 	}
+	// Test store configuration with body placeholder
+	storeWithBodyPlaceholder := map[string]string{
+		"token": "[BODY].accessToken",
+	}
+	if !(&Endpoint{
+		Conditions: []Condition{statusCondition},
+		Store:      storeWithBodyPlaceholder,
+	}).needsToReadBody() {
+		t.Error("expected true when store has body placeholder, got false")
+	}
+	// Test store configuration without body placeholder
+	storeWithoutBodyPlaceholder := map[string]string{
+		"status": "[STATUS]",
+	}
+	if (&Endpoint{
+		Conditions: []Condition{statusCondition},
+		Store:      storeWithoutBodyPlaceholder,
+	}).needsToReadBody() {
+		t.Error("expected false when store has no body placeholder, got true")
+	}
+	// Test empty store
+	if (&Endpoint{
+		Conditions: []Condition{statusCondition},
+		Store:      map[string]string{},
+	}).needsToReadBody() {
+		t.Error("expected false when store is empty, got true")
+	}
+	// Test nil store
+	if (&Endpoint{
+		Conditions: []Condition{statusCondition},
+		Store:      nil,
+	}).needsToReadBody() {
+		t.Error("expected false when store is nil, got true")
+	}
 }
 
 func TestEndpoint_needsToRetrieveDomainExpiration(t *testing.T) {
@@ -932,3 +967,484 @@ func TestEndpoint_needsToRetrieveIP(t *testing.T) {
 		t.Error("expected true, got false")
 	}
 }
+
+func TestEndpoint_preprocessWithContext(t *testing.T) {
+	// Import the gontext package for creating test contexts
+	// This test thoroughly exercises the replaceContextPlaceholders function
+	tests := []struct {
+		name                  string
+		endpoint              *Endpoint
+		context               map[string]interface{}
+		expectedURL           string
+		expectedBody          string
+		expectedHeaders       map[string]string
+		expectedErrorCount    int
+		expectedErrorContains []string
+	}{
+		{
+			name: "successful_url_replacement",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].userId",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"userId": "12345",
+			},
+			expectedURL:        "https://api.example.com/users/12345",
+			expectedBody:       "",
+			expectedErrorCount: 0,
+		},
+		{
+			name: "successful_body_replacement",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com",
+				Body: `{"userId": "[CONTEXT].userId", "action": "update"}`,
+			},
+			context: map[string]interface{}{
+				"userId": "67890",
+			},
+			expectedURL:        "https://api.example.com",
+			expectedBody:       `{"userId": "67890", "action": "update"}`,
+			expectedErrorCount: 0,
+		},
+		{
+			name: "successful_header_replacement",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com",
+				Body: "",
+				Headers: map[string]string{
+					"Authorization": "Bearer [CONTEXT].token",
+					"X-User-ID":     "[CONTEXT].userId",
+				},
+			},
+			context: map[string]interface{}{
+				"token":  "abc123token",
+				"userId": "user123",
+			},
+			expectedURL:  "https://api.example.com",
+			expectedBody: "",
+			expectedHeaders: map[string]string{
+				"Authorization": "Bearer abc123token",
+				"X-User-ID":     "user123",
+			},
+			expectedErrorCount: 0,
+		},
+		{
+			name: "multiple_placeholders_in_url",
+			endpoint: &Endpoint{
+				URL:  "https://[CONTEXT].host/api/v[CONTEXT].version/users/[CONTEXT].userId",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"host":    "api.example.com",
+				"version": "2",
+				"userId":  "12345",
+			},
+			expectedURL:        "https://api.example.com/api/v2/users/12345",
+			expectedBody:       "",
+			expectedErrorCount: 0,
+		},
+		{
+			name: "nested_context_path",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].user.id",
+				Body: `{"name": "[CONTEXT].user.name"}`,
+			},
+			context: map[string]interface{}{
+				"user": map[string]interface{}{
+					"id":   "nested123",
+					"name": "John Doe",
+				},
+			},
+			expectedURL:        "https://api.example.com/users/nested123",
+			expectedBody:       `{"name": "John Doe"}`,
+			expectedErrorCount: 0,
+		},
+		{
+			name: "url_context_not_found",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].missingUserId",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"userId": "12345", // different key
+			},
+			expectedURL:           "https://api.example.com/users/[CONTEXT].missingUserId",
+			expectedBody:          "",
+			expectedErrorCount:    1,
+			expectedErrorContains: []string{"path 'missingUserId' not found"},
+		},
+		{
+			name: "body_context_not_found",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com",
+				Body: `{"userId": "[CONTEXT].missingUserId"}`,
+			},
+			context: map[string]interface{}{
+				"userId": "12345", // different key
+			},
+			expectedURL:           "https://api.example.com",
+			expectedBody:          `{"userId": "[CONTEXT].missingUserId"}`,
+			expectedErrorCount:    1,
+			expectedErrorContains: []string{"path 'missingUserId' not found"},
+		},
+		{
+			name: "header_context_not_found",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com",
+				Body: "",
+				Headers: map[string]string{
+					"Authorization": "Bearer [CONTEXT].missingToken",
+				},
+			},
+			context: map[string]interface{}{
+				"token": "validtoken", // different key
+			},
+			expectedURL:  "https://api.example.com",
+			expectedBody: "",
+			expectedHeaders: map[string]string{
+				"Authorization": "Bearer [CONTEXT].missingToken",
+			},
+			expectedErrorCount:    1,
+			expectedErrorContains: []string{"path 'missingToken' not found"},
+		},
+		{
+			name: "multiple_missing_context_paths",
+			endpoint: &Endpoint{
+				URL:  "https://[CONTEXT].missingHost/users/[CONTEXT].missingUserId",
+				Body: `{"token": "[CONTEXT].missingToken"}`,
+			},
+			context: map[string]interface{}{
+				"validKey": "validValue",
+			},
+			expectedURL:        "https://[CONTEXT].missingHost/users/[CONTEXT].missingUserId",
+			expectedBody:       `{"token": "[CONTEXT].missingToken"}`,
+			expectedErrorCount: 2, // 1 for URL (both placeholders), 1 for Body
+			expectedErrorContains: []string{
+				"path 'missingHost' not found",
+				"path 'missingUserId' not found",
+				"path 'missingToken' not found",
+			},
+		},
+		{
+			name: "mixed_valid_and_invalid_placeholders",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].userId/posts/[CONTEXT].missingPostId",
+				Body: `{"userId": "[CONTEXT].userId", "action": "[CONTEXT].missingAction"}`,
+			},
+			context: map[string]interface{}{
+				"userId": "12345",
+			},
+			expectedURL:        "https://api.example.com/users/12345/posts/[CONTEXT].missingPostId",
+			expectedBody:       `{"userId": "12345", "action": "[CONTEXT].missingAction"}`,
+			expectedErrorCount: 2,
+			expectedErrorContains: []string{
+				"path 'missingPostId' not found",
+				"path 'missingAction' not found",
+			},
+		},
+		{
+			name: "nil_context",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].userId",
+				Body: "",
+			},
+			context:            nil,
+			expectedURL:        "https://api.example.com/users/[CONTEXT].userId",
+			expectedBody:       "",
+			expectedErrorCount: 0,
+		},
+		{
+			name: "empty_context",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].userId",
+				Body: "",
+			},
+			context:               map[string]interface{}{},
+			expectedURL:           "https://api.example.com/users/[CONTEXT].userId",
+			expectedBody:          "",
+			expectedErrorCount:    1,
+			expectedErrorContains: []string{"path 'userId' not found"},
+		},
+		{
+			name: "special_characters_in_context_values",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/search?q=[CONTEXT].query",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"query": "hello world & special chars!",
+			},
+			expectedURL:        "https://api.example.com/search?q=hello world & special chars!",
+			expectedBody:       "",
+			expectedErrorCount: 0,
+		},
+		{
+			name: "numeric_context_values",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].userId/limit/[CONTEXT].limit",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"userId": 12345,
+				"limit":  100,
+			},
+			expectedURL:        "https://api.example.com/users/12345/limit/100",
+			expectedBody:       "",
+			expectedErrorCount: 0,
+		},
+		{
+			name: "boolean_context_values",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com",
+				Body: `{"enabled": [CONTEXT].enabled, "active": [CONTEXT].active}`,
+			},
+			context: map[string]interface{}{
+				"enabled": true,
+				"active":  false,
+			},
+			expectedURL:        "https://api.example.com",
+			expectedBody:       `{"enabled": true, "active": false}`,
+			expectedErrorCount: 0,
+		},
+		{
+			name: "no_context_placeholders",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/health",
+				Body: `{"status": "check"}`,
+				Headers: map[string]string{
+					"Content-Type": "application/json",
+				},
+			},
+			context: map[string]interface{}{
+				"userId": "12345",
+			},
+			expectedURL:  "https://api.example.com/health",
+			expectedBody: `{"status": "check"}`,
+			expectedHeaders: map[string]string{
+				"Content-Type": "application/json",
+			},
+			expectedErrorCount: 0,
+		},
+		{
+			name: "deeply_nested_context_path",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].response.data.user.id",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"response": map[string]interface{}{
+					"data": map[string]interface{}{
+						"user": map[string]interface{}{
+							"id": "deep123",
+						},
+					},
+				},
+			},
+			expectedURL:        "https://api.example.com/users/deep123",
+			expectedBody:       "",
+			expectedErrorCount: 0,
+		},
+		{
+			name: "invalid_nested_context_path",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].response.missing.path",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"response": map[string]interface{}{
+					"data": "value",
+				},
+			},
+			expectedURL:           "https://api.example.com/users/[CONTEXT].response.missing.path",
+			expectedBody:          "",
+			expectedErrorCount:    1,
+			expectedErrorContains: []string{"path 'response.missing.path' not found"},
+		},
+		{
+			name: "hyphen_support_in_simple_keys",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].user-id",
+				Body: `{"api-key": "[CONTEXT].api-key", "user-name": "[CONTEXT].user-name"}`,
+			},
+			context: map[string]interface{}{
+				"user-id":   "user-12345",
+				"api-key":   "key-abcdef",
+				"user-name": "john-doe",
+			},
+			expectedURL:        "https://api.example.com/users/user-12345",
+			expectedBody:       `{"api-key": "key-abcdef", "user-name": "john-doe"}`,
+			expectedErrorCount: 0,
+		},
+		{
+			name: "hyphen_support_in_headers",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com",
+				Body: "",
+				Headers: map[string]string{
+					"X-API-Key":    "[CONTEXT].api-key",
+					"X-User-ID":    "[CONTEXT].user-id",
+					"Content-Type": "[CONTEXT].content-type",
+				},
+			},
+			context: map[string]interface{}{
+				"api-key":      "secret-key-123",
+				"user-id":      "user-456",
+				"content-type": "application-json",
+			},
+			expectedURL:  "https://api.example.com",
+			expectedBody: "",
+			expectedHeaders: map[string]string{
+				"X-API-Key":    "secret-key-123",
+				"X-User-ID":    "user-456",
+				"Content-Type": "application-json",
+			},
+			expectedErrorCount: 0,
+		},
+		{
+			name: "mixed_hyphens_underscores_and_dots",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/[CONTEXT].service-name/[CONTEXT].user_data.user-id",
+				Body: `{"tenant-id": "[CONTEXT].tenant_config.tenant-id"}`,
+			},
+			context: map[string]interface{}{
+				"service-name": "auth-service",
+				"user_data": map[string]interface{}{
+					"user-id": "user-789",
+				},
+				"tenant_config": map[string]interface{}{
+					"tenant-id": "tenant-abc-123",
+				},
+			},
+			expectedURL:        "https://api.example.com/auth-service/user-789",
+			expectedBody:       `{"tenant-id": "tenant-abc-123"}`,
+			expectedErrorCount: 0,
+		},
+		{
+			name: "hyphen_in_nested_paths",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].auth-response.user-data.profile-id",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"auth-response": map[string]interface{}{
+					"user-data": map[string]interface{}{
+						"profile-id": "profile-xyz-789",
+					},
+				},
+			},
+			expectedURL:        "https://api.example.com/users/profile-xyz-789",
+			expectedBody:       "",
+			expectedErrorCount: 0,
+		},
+		{
+			name: "missing_hyphenated_context_key",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/users/[CONTEXT].missing-user-id",
+				Body: `{"api-key": "[CONTEXT].missing-api-key"}`,
+			},
+			context: map[string]interface{}{
+				"user-id": "valid-user", // different key
+			},
+			expectedURL:           "https://api.example.com/users/[CONTEXT].missing-user-id",
+			expectedBody:          `{"api-key": "[CONTEXT].missing-api-key"}`,
+			expectedErrorCount:    2,
+			expectedErrorContains: []string{"path 'missing-user-id' not found", "path 'missing-api-key' not found"},
+		},
+		{
+			name: "multiple_hyphens_in_single_key",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/[CONTEXT].multi-hyphen-key-name",
+				Body: "",
+			},
+			context: map[string]interface{}{
+				"multi-hyphen-key-name": "value-with-multiple-hyphens",
+			},
+			expectedURL:        "https://api.example.com/value-with-multiple-hyphens",
+			expectedBody:       "",
+			expectedErrorCount: 0,
+		},
+		{
+			name: "hyphens_with_numeric_values",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com/limit/[CONTEXT].max-items",
+				Body: `{"timeout-ms": [CONTEXT].timeout-ms, "retry-count": [CONTEXT].retry-count}`,
+			},
+			context: map[string]interface{}{
+				"max-items":   100,
+				"timeout-ms":  5000,
+				"retry-count": 3,
+			},
+			expectedURL:        "https://api.example.com/limit/100",
+			expectedBody:       `{"timeout-ms": 5000, "retry-count": 3}`,
+			expectedErrorCount: 0,
+		},
+		{
+			name: "hyphens_with_boolean_values",
+			endpoint: &Endpoint{
+				URL:  "https://api.example.com",
+				Body: `{"enable-feature": [CONTEXT].enable-feature, "disable-cache": [CONTEXT].disable-cache}`,
+			},
+			context: map[string]interface{}{
+				"enable-feature": true,
+				"disable-cache":  false,
+			},
+			expectedURL:        "https://api.example.com",
+			expectedBody:       `{"enable-feature": true, "disable-cache": false}`,
+			expectedErrorCount: 0,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Import gontext package for creating context
+			var ctx *gontext.Gontext
+			if tt.context != nil {
+				ctx = gontext.New(tt.context)
+			}
+			// Create a new Result to capture errors
+			result := &Result{}
+			// Call preprocessWithContext
+			processed := tt.endpoint.preprocessWithContext(result, ctx)
+			// Verify URL
+			if processed.URL != tt.expectedURL {
+				t.Errorf("URL mismatch:\nexpected: %s\nactual:   %s", tt.expectedURL, processed.URL)
+			}
+			// Verify Body
+			if processed.Body != tt.expectedBody {
+				t.Errorf("Body mismatch:\nexpected: %s\nactual:   %s", tt.expectedBody, processed.Body)
+			}
+			// Verify Headers
+			if tt.expectedHeaders != nil {
+				if processed.Headers == nil {
+					t.Error("Expected headers but got nil")
+				} else {
+					for key, expectedValue := range tt.expectedHeaders {
+						if actualValue, exists := processed.Headers[key]; !exists {
+							t.Errorf("Expected header %s not found", key)
+						} else if actualValue != expectedValue {
+							t.Errorf("Header %s mismatch:\nexpected: %s\nactual:   %s", key, expectedValue, actualValue)
+						}
+					}
+				}
+			}
+			// Verify error count
+			if len(result.Errors) != tt.expectedErrorCount {
+				t.Errorf("Error count mismatch:\nexpected: %d\nactual:   %d\nerrors: %v", tt.expectedErrorCount, len(result.Errors), result.Errors)
+			}
+			// Verify error messages contain expected strings
+			if tt.expectedErrorContains != nil {
+				actualErrors := strings.Join(result.Errors, " ")
+				for _, expectedError := range tt.expectedErrorContains {
+					if !strings.Contains(actualErrors, expectedError) {
+						t.Errorf("Expected error containing '%s' not found in: %v", expectedError, result.Errors)
+					}
+				}
+			}
+			// Verify original endpoint is not modified
+			if tt.endpoint.URL != ((&Endpoint{URL: tt.endpoint.URL, Body: tt.endpoint.Body, Headers: tt.endpoint.Headers}).URL) {
+				t.Error("Original endpoint was modified")
+			}
+		})
+	}
+}

config/endpoint/external_endpoint.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/TwiN/gatus/v5/alerting/alert"
 	"github.com/TwiN/gatus/v5/config/endpoint/heartbeat"
+	"github.com/TwiN/gatus/v5/config/key"
 	"github.com/TwiN/gatus/v5/config/maintenance"
 )
 
@@ -82,7 +83,7 @@ func (externalEndpoint *ExternalEndpoint) DisplayName() string {
 
 // Key returns the unique key for the Endpoint
 func (externalEndpoint *ExternalEndpoint) Key() string {
-	return ConvertGroupAndEndpointNameToKey(externalEndpoint.Group, externalEndpoint.Name)
+	return key.ConvertGroupAndNameToKey(externalEndpoint.Group, externalEndpoint.Name)
 }
 
 // ToEndpoint converts the ExternalEndpoint to an Endpoint

config/endpoint/external_endpoint_test.go

@@ -2,24 +2,379 @@ package endpoint
 
 import (
 	"testing"
+	"time"
+
+	"github.com/TwiN/gatus/v5/alerting/alert"
+	"github.com/TwiN/gatus/v5/config/endpoint/heartbeat"
+	"github.com/TwiN/gatus/v5/config/maintenance"
 )
 
-func TestExternalEndpoint_ToEndpoint(t *testing.T) {
-	externalEndpoint := &ExternalEndpoint{
-		Name:  "name",
-		Group: "group",
+func TestExternalEndpoint_ValidateAndSetDefaults(t *testing.T) {
+	tests := []struct {
+		name     string
+		endpoint *ExternalEndpoint
+		wantErr  error
+	}{
+		{
+			name: "valid-external-endpoint",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Group: "test-group",
+				Token: "valid-token",
+			},
+			wantErr: nil,
+		},
+		{
+			name: "valid-external-endpoint-with-heartbeat",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Token: "valid-token",
+				Heartbeat: heartbeat.Config{
+					Interval: 30 * time.Second,
+				},
+			},
+			wantErr: nil,
+		},
+		{
+			name: "missing-token",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Group: "test-group",
+			},
+			wantErr: ErrExternalEndpointWithNoToken,
+		},
+		{
+			name: "empty-token",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Token: "",
+			},
+			wantErr: ErrExternalEndpointWithNoToken,
+		},
+		{
+			name: "heartbeat-interval-too-low",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Token: "valid-token",
+				Heartbeat: heartbeat.Config{
+					Interval: 5 * time.Second, // Less than 10 seconds
+				},
+			},
+			wantErr: ErrExternalEndpointHeartbeatIntervalTooLow,
+		},
+		{
+			name: "heartbeat-interval-exactly-10-seconds",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Token: "valid-token",
+				Heartbeat: heartbeat.Config{
+					Interval: 10 * time.Second,
+				},
+			},
+			wantErr: nil,
+		},
+		{
+			name: "heartbeat-interval-zero-is-allowed",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Token: "valid-token",
+				Heartbeat: heartbeat.Config{
+					Interval: 0, // Zero means no heartbeat monitoring
+				},
+			},
+			wantErr: nil,
+		},
+		{
+			name: "missing-name",
+			endpoint: &ExternalEndpoint{
+				Group: "test-group",
+				Token: "valid-token",
+			},
+			wantErr: ErrEndpointWithNoName,
+		},
 	}
-	convertedEndpoint := externalEndpoint.ToEndpoint()
-	if externalEndpoint.Name != convertedEndpoint.Name {
-		t.Errorf("expected %s, got %s", externalEndpoint.Name, convertedEndpoint.Name)
-	}
-	if externalEndpoint.Group != convertedEndpoint.Group {
-		t.Errorf("expected %s, got %s", externalEndpoint.Group, convertedEndpoint.Group)
-	}
-	if externalEndpoint.Key() != convertedEndpoint.Key() {
-		t.Errorf("expected %s, got %s", externalEndpoint.Key(), convertedEndpoint.Key())
-	}
-	if externalEndpoint.DisplayName() != convertedEndpoint.DisplayName() {
-		t.Errorf("expected %s, got %s", externalEndpoint.DisplayName(), convertedEndpoint.DisplayName())
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := tt.endpoint.ValidateAndSetDefaults()
+			if tt.wantErr != nil {
+				if err == nil {
+					t.Errorf("Expected error %v, but got none", tt.wantErr)
+					return
+				}
+				if err.Error() != tt.wantErr.Error() {
+					t.Errorf("Expected error %v, got %v", tt.wantErr, err)
+				}
+			} else {
+				if err != nil {
+					t.Errorf("Expected no error, but got %v", err)
+				}
+			}
+		})
 	}
 }
+
+func TestExternalEndpoint_IsEnabled(t *testing.T) {
+	tests := []struct {
+		name     string
+		enabled  *bool
+		expected bool
+	}{
+		{
+			name:     "nil-enabled-defaults-to-true",
+			enabled:  nil,
+			expected: true,
+		},
+		{
+			name:     "explicitly-enabled",
+			enabled:  boolPtr(true),
+			expected: true,
+		},
+		{
+			name:     "explicitly-disabled",
+			enabled:  boolPtr(false),
+			expected: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			endpoint := &ExternalEndpoint{
+				Name:    "test-endpoint",
+				Token:   "test-token",
+				Enabled: tt.enabled,
+			}
+			result := endpoint.IsEnabled()
+			if result != tt.expected {
+				t.Errorf("Expected %v, got %v", tt.expected, result)
+			}
+		})
+	}
+}
+
+func TestExternalEndpoint_DisplayName(t *testing.T) {
+	tests := []struct {
+		name     string
+		endpoint *ExternalEndpoint
+		expected string
+	}{
+		{
+			name: "with-group",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Group: "test-group",
+			},
+			expected: "test-group/test-endpoint",
+		},
+		{
+			name: "without-group",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Group: "",
+			},
+			expected: "test-endpoint",
+		},
+		{
+			name: "empty-group-string",
+			endpoint: &ExternalEndpoint{
+				Name:  "api-health",
+				Group: "",
+			},
+			expected: "api-health",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := tt.endpoint.DisplayName()
+			if result != tt.expected {
+				t.Errorf("Expected %q, got %q", tt.expected, result)
+			}
+		})
+	}
+}
+
+func TestExternalEndpoint_Key(t *testing.T) {
+	tests := []struct {
+		name     string
+		endpoint *ExternalEndpoint
+		expected string
+	}{
+		{
+			name: "with-group",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Group: "test-group",
+			},
+			expected: "test-group_test-endpoint",
+		},
+		{
+			name: "without-group",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Group: "",
+			},
+			expected: "_test-endpoint",
+		},
+		{
+			name: "special-characters-in-name",
+			endpoint: &ExternalEndpoint{
+				Name:  "test endpoint with spaces",
+				Group: "test-group",
+			},
+			expected: "test-group_test-endpoint-with-spaces",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := tt.endpoint.Key()
+			if result != tt.expected {
+				t.Errorf("Expected %q, got %q", tt.expected, result)
+			}
+		})
+	}
+}
+
+func TestExternalEndpoint_ToEndpoint(t *testing.T) {
+	tests := []struct {
+		name             string
+		externalEndpoint *ExternalEndpoint
+	}{
+		{
+			name: "complete-external-endpoint",
+			externalEndpoint: &ExternalEndpoint{
+				Enabled: boolPtr(true),
+				Name:    "test-endpoint",
+				Group:   "test-group",
+				Token:   "test-token",
+				Alerts: []*alert.Alert{
+					{
+						Type: alert.TypeSlack,
+					},
+				},
+				MaintenanceWindows: []*maintenance.Config{
+					{
+						Start:    "02:00",
+						Duration: time.Hour,
+					},
+				},
+				NumberOfFailuresInARow:  3,
+				NumberOfSuccessesInARow: 5,
+			},
+		},
+		{
+			name: "minimal-external-endpoint",
+			externalEndpoint: &ExternalEndpoint{
+				Name:  "minimal-endpoint",
+				Token: "minimal-token",
+			},
+		},
+		{
+			name: "disabled-external-endpoint",
+			externalEndpoint: &ExternalEndpoint{
+				Enabled: boolPtr(false),
+				Name:    "disabled-endpoint",
+				Token:   "disabled-token",
+			},
+		},
+		{
+			name: "original-test-case",
+			externalEndpoint: &ExternalEndpoint{
+				Name:  "name",
+				Group: "group",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := tt.externalEndpoint.ToEndpoint()
+			// Verify all fields are correctly copied
+			if result.Enabled != tt.externalEndpoint.Enabled {
+				t.Errorf("Expected Enabled=%v, got %v", tt.externalEndpoint.Enabled, result.Enabled)
+			}
+			if result.Name != tt.externalEndpoint.Name {
+				t.Errorf("Expected Name=%q, got %q", tt.externalEndpoint.Name, result.Name)
+			}
+			if result.Group != tt.externalEndpoint.Group {
+				t.Errorf("Expected Group=%q, got %q", tt.externalEndpoint.Group, result.Group)
+			}
+			if len(result.Alerts) != len(tt.externalEndpoint.Alerts) {
+				t.Errorf("Expected %d alerts, got %d", len(tt.externalEndpoint.Alerts), len(result.Alerts))
+			}
+			if result.NumberOfFailuresInARow != tt.externalEndpoint.NumberOfFailuresInARow {
+				t.Errorf("Expected NumberOfFailuresInARow=%d, got %d", tt.externalEndpoint.NumberOfFailuresInARow, result.NumberOfFailuresInARow)
+			}
+			if result.NumberOfSuccessesInARow != tt.externalEndpoint.NumberOfSuccessesInARow {
+				t.Errorf("Expected NumberOfSuccessesInARow=%d, got %d", tt.externalEndpoint.NumberOfSuccessesInARow, result.NumberOfSuccessesInARow)
+			}
+			// Original test assertions
+			if tt.externalEndpoint.Key() != result.Key() {
+				t.Errorf("expected %s, got %s", tt.externalEndpoint.Key(), result.Key())
+			}
+			if tt.externalEndpoint.DisplayName() != result.DisplayName() {
+				t.Errorf("expected %s, got %s", tt.externalEndpoint.DisplayName(), result.DisplayName())
+			}
+			// Verify it's a proper Endpoint type
+			if result == nil {
+				t.Error("ToEndpoint() returned nil")
+			}
+		})
+	}
+}
+
+func TestExternalEndpoint_ValidationEdgeCases(t *testing.T) {
+	tests := []struct {
+		name     string
+		endpoint *ExternalEndpoint
+		wantErr  bool
+	}{
+		{
+			name: "very-long-name",
+			endpoint: &ExternalEndpoint{
+				Name:  "this-is-a-very-long-endpoint-name-that-might-cause-issues-in-some-systems-but-should-be-handled-gracefully",
+				Token: "valid-token",
+			},
+			wantErr: false,
+		},
+		{
+			name: "special-characters-in-name",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint@#$%^&*()",
+				Token: "valid-token",
+			},
+			wantErr: false,
+		},
+		{
+			name: "unicode-characters-in-name",
+			endpoint: &ExternalEndpoint{
+				Name:  "测试端点",
+				Token: "valid-token",
+			},
+			wantErr: false,
+		},
+		{
+			name: "very-long-token",
+			endpoint: &ExternalEndpoint{
+				Name:  "test-endpoint",
+				Token: "very-long-token-that-should-still-be-valid-even-though-it-is-extremely-long-and-might-not-be-practical-in-real-world-scenarios",
+			},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := tt.endpoint.ValidateAndSetDefaults()
+			if tt.wantErr && err == nil {
+				t.Error("Expected error but got none")
+			}
+			if !tt.wantErr && err != nil {
+				t.Errorf("Expected no error but got: %v", err)
+			}
+		})
+	}
+}
+
+// Helper function to create bool pointers
+func boolPtr(b bool) *bool {
+	return &b
+}

config/endpoint/key_bench_test.go

@@ -1,11 +0,0 @@
-package endpoint
-
-import (
-	"testing"
-)
-
-func BenchmarkConvertGroupAndEndpointNameToKey(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		ConvertGroupAndEndpointNameToKey("group", "name")
-	}
-}

config/endpoint/placeholder.go

@@ -0,0 +1,273 @@
+package endpoint
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/TwiN/gatus/v5/config/gontext"
+	"github.com/TwiN/gatus/v5/jsonpath"
+)
+
+// Placeholders
+const (
+	// StatusPlaceholder is a placeholder for a HTTP status.
+	//
+	// Values that could replace the placeholder: 200, 404, 500, ...
+	StatusPlaceholder = "[STATUS]"
+
+	// IPPlaceholder is a placeholder for an IP.
+	//
+	// Values that could replace the placeholder: 127.0.0.1, 10.0.0.1, ...
+	IPPlaceholder = "[IP]"
+
+	// DNSRCodePlaceholder is a placeholder for DNS_RCODE
+	//
+	// Values that could replace the placeholder: NOERROR, FORMERR, SERVFAIL, NXDOMAIN, NOTIMP, REFUSED
+	DNSRCodePlaceholder = "[DNS_RCODE]"
+
+	// ResponseTimePlaceholder is a placeholder for the request response time, in milliseconds.
+	//
+	// Values that could replace the placeholder: 1, 500, 1000, ...
+	ResponseTimePlaceholder = "[RESPONSE_TIME]"
+
+	// BodyPlaceholder is a placeholder for the Body of the response
+	//
+	// Values that could replace the placeholder: {}, {"data":{"name":"john"}}, ...
+	BodyPlaceholder = "[BODY]"
+
+	// ConnectedPlaceholder is a placeholder for whether a connection was successfully established.
+	//
+	// Values that could replace the placeholder: true, false
+	ConnectedPlaceholder = "[CONNECTED]"
+
+	// CertificateExpirationPlaceholder is a placeholder for the duration before certificate expiration, in milliseconds.
+	//
+	// Values that could replace the placeholder: 4461677039 (~52 days)
+	CertificateExpirationPlaceholder = "[CERTIFICATE_EXPIRATION]"
+
+	// DomainExpirationPlaceholder is a placeholder for the duration before the domain expires, in milliseconds.
+	DomainExpirationPlaceholder = "[DOMAIN_EXPIRATION]"
+
+	// ContextPlaceholder is a placeholder for suite context values
+	// Usage: [CONTEXT].path.to.value
+	ContextPlaceholder = "[CONTEXT]"
+)
+
+// Functions
+const (
+	// LengthFunctionPrefix is the prefix for the length function
+	//
+	// Usage: len([BODY].articles) == 10, len([BODY].name) > 5
+	LengthFunctionPrefix = "len("
+
+	// HasFunctionPrefix is the prefix for the has function
+	//
+	// Usage: has([BODY].errors) == true
+	HasFunctionPrefix = "has("
+
+	// PatternFunctionPrefix is the prefix for the pattern function
+	//
+	// Usage: [IP] == pat(192.168.*.*)
+	PatternFunctionPrefix = "pat("
+
+	// AnyFunctionPrefix is the prefix for the any function
+	//
+	// Usage: [IP] == any(1.1.1.1, 1.0.0.1)
+	AnyFunctionPrefix = "any("
+
+	// FunctionSuffix is the suffix for all functions
+	FunctionSuffix = ")"
+)
+
+// Other constants
+const (
+	// InvalidConditionElementSuffix is the suffix that will be appended to an invalid condition
+	InvalidConditionElementSuffix = "(INVALID)"
+)
+
+// functionType represents the type of function wrapper
+type functionType int
+
+const (
+	// Note that not all functions are handled here. Only len() and has() directly impact the handler
+	// e.g. "len([BODY].name) > 0" vs pat() or any(), which would be used like "[BODY].name == pat(john*)"
+
+	noFunction functionType = iota
+	functionLen
+	functionHas
+)
+
+// ResolvePlaceholder resolves all types of placeholders to their string values.
+//
+// Supported placeholders:
+//   - [STATUS]: HTTP status code (e.g., "200", "404")
+//   - [IP]: IP address from the response (e.g., "127.0.0.1")
+//   - [RESPONSE_TIME]: Response time in milliseconds (e.g., "250")
+//   - [DNS_RCODE]: DNS response code (e.g., "NOERROR", "NXDOMAIN")
+//   - [CONNECTED]: Connection status (e.g., "true", "false")
+//   - [CERTIFICATE_EXPIRATION]: Certificate expiration time in milliseconds
+//   - [DOMAIN_EXPIRATION]: Domain expiration time in milliseconds
+//   - [BODY]: Full response body
+//   - [BODY].path: JSONPath expression on response body (e.g., [BODY].status, [BODY].data[0].name)
+//   - [CONTEXT].path: Suite context values (e.g., [CONTEXT].user_id, [CONTEXT].session_token)
+//
+// Function wrappers:
+//   - len(placeholder): Returns the length of the resolved value
+//   - has(placeholder): Returns "true" if the placeholder exists and is non-empty, "false" otherwise
+//
+// Examples:
+//   - ResolvePlaceholder("[STATUS]", result, nil) → "200"
+//   - ResolvePlaceholder("len([BODY].items)", result, nil) → "5" (for JSON array with 5 items)
+//   - ResolvePlaceholder("has([CONTEXT].user_id)", result, ctx) → "true" (if context has user_id)
+//   - ResolvePlaceholder("[BODY].user.name", result, nil) → "john" (for {"user":{"name":"john"}})
+//
+// Case-insensitive: All placeholder names are handled case-insensitively, but paths preserve original case.
+func ResolvePlaceholder(placeholder string, result *Result, ctx *gontext.Gontext) (string, error) {
+	placeholder = strings.TrimSpace(placeholder)
+	originalPlaceholder := placeholder
+
+	// Extract function wrapper if present
+	fn, innerPlaceholder := extractFunctionWrapper(placeholder)
+	placeholder = innerPlaceholder
+
+	// Handle CONTEXT placeholders
+	uppercasePlaceholder := strings.ToUpper(placeholder)
+	if strings.HasPrefix(uppercasePlaceholder, ContextPlaceholder) && ctx != nil {
+		return resolveContextPlaceholder(placeholder, fn, originalPlaceholder, ctx)
+	}
+
+	// Handle basic placeholders (try uppercase first for backward compatibility)
+	switch uppercasePlaceholder {
+	case StatusPlaceholder:
+		return formatWithFunction(strconv.Itoa(result.HTTPStatus), fn), nil
+	case IPPlaceholder:
+		return formatWithFunction(result.IP, fn), nil
+	case ResponseTimePlaceholder:
+		return formatWithFunction(strconv.FormatInt(result.Duration.Milliseconds(), 10), fn), nil
+	case DNSRCodePlaceholder:
+		return formatWithFunction(result.DNSRCode, fn), nil
+	case ConnectedPlaceholder:
+		return formatWithFunction(strconv.FormatBool(result.Connected), fn), nil
+	case CertificateExpirationPlaceholder:
+		return formatWithFunction(strconv.FormatInt(result.CertificateExpiration.Milliseconds(), 10), fn), nil
+	case DomainExpirationPlaceholder:
+		return formatWithFunction(strconv.FormatInt(result.DomainExpiration.Milliseconds(), 10), fn), nil
+	case BodyPlaceholder:
+		body := strings.TrimSpace(string(result.Body))
+		if fn == functionHas {
+			return strconv.FormatBool(len(body) > 0), nil
+		}
+		if fn == functionLen {
+			// For len([BODY]), we need to check if it's JSON and get the actual length
+			// Use jsonpath to evaluate the root element
+			_, resolvedLength, err := jsonpath.Eval("", result.Body)
+			if err == nil {
+				return strconv.Itoa(resolvedLength), nil
+			}
+			// Fall back to string length if not valid JSON
+			return strconv.Itoa(len(body)), nil
+		}
+		return body, nil
+	}
+
+	// Handle JSONPath expressions on BODY (including array indexing)
+	if strings.HasPrefix(uppercasePlaceholder, BodyPlaceholder+".") || strings.HasPrefix(uppercasePlaceholder, BodyPlaceholder+"[") {
+		return resolveJSONPathPlaceholder(placeholder, fn, originalPlaceholder, result)
+	}
+
+	// Not a recognized placeholder
+	if fn != noFunction {
+		if fn == functionHas {
+			return "false", nil
+		}
+		// For len() with unrecognized placeholder, return with INVALID suffix
+		return originalPlaceholder + " " + InvalidConditionElementSuffix, nil
+	}
+
+	// Return the original placeholder if we can't resolve it
+	// This allows for literal string comparisons
+	return originalPlaceholder, nil
+}
+
+// extractFunctionWrapper detects and extracts function wrappers (len, has)
+func extractFunctionWrapper(placeholder string) (functionType, string) {
+	if strings.HasPrefix(placeholder, LengthFunctionPrefix) && strings.HasSuffix(placeholder, FunctionSuffix) {
+		inner := strings.TrimSuffix(strings.TrimPrefix(placeholder, LengthFunctionPrefix), FunctionSuffix)
+		return functionLen, inner
+	}
+	if strings.HasPrefix(placeholder, HasFunctionPrefix) && strings.HasSuffix(placeholder, FunctionSuffix) {
+		inner := strings.TrimSuffix(strings.TrimPrefix(placeholder, HasFunctionPrefix), FunctionSuffix)
+		return functionHas, inner
+	}
+	return noFunction, placeholder
+}
+
+// resolveJSONPathPlaceholder handles [BODY].path and [BODY][index] placeholders
+func resolveJSONPathPlaceholder(placeholder string, fn functionType, originalPlaceholder string, result *Result) (string, error) {
+	// Extract the path after [BODY] (case insensitive)
+	uppercasePlaceholder := strings.ToUpper(placeholder)
+	path := ""
+	if strings.HasPrefix(uppercasePlaceholder, BodyPlaceholder) {
+		path = placeholder[len(BodyPlaceholder):]
+	} else {
+		path = strings.TrimPrefix(placeholder, BodyPlaceholder)
+	}
+	// Remove leading dot if present
+	path = strings.TrimPrefix(path, ".")
+	resolvedValue, resolvedLength, err := jsonpath.Eval(path, result.Body)
+	if fn == functionHas {
+		return strconv.FormatBool(err == nil), nil
+	}
+	if err != nil {
+		return originalPlaceholder + " " + InvalidConditionElementSuffix, nil
+	}
+	if fn == functionLen {
+		return strconv.Itoa(resolvedLength), nil
+	}
+	return resolvedValue, nil
+}
+
+// resolveContextPlaceholder handles [CONTEXT] placeholder resolution
+func resolveContextPlaceholder(placeholder string, fn functionType, originalPlaceholder string, ctx *gontext.Gontext) (string, error) {
+	contextPath := strings.TrimPrefix(placeholder, ContextPlaceholder)
+	contextPath = strings.TrimPrefix(contextPath, ".")
+	if contextPath == "" {
+		if fn == functionHas {
+			return "false", nil
+		}
+		return originalPlaceholder + " " + InvalidConditionElementSuffix, nil
+	}
+	value, err := ctx.Get(contextPath)
+	if fn == functionHas {
+		return strconv.FormatBool(err == nil), nil
+	}
+	if err != nil {
+		return originalPlaceholder + " " + InvalidConditionElementSuffix, nil
+	}
+	if fn == functionLen {
+		switch v := value.(type) {
+		case string:
+			return strconv.Itoa(len(v)), nil
+		case []interface{}:
+			return strconv.Itoa(len(v)), nil
+		case map[string]interface{}:
+			return strconv.Itoa(len(v)), nil
+		default:
+			return strconv.Itoa(len(fmt.Sprintf("%v", v))), nil
+		}
+	}
+	return fmt.Sprintf("%v", value), nil
+}
+
+// formatWithFunction applies len/has functions to any value
+func formatWithFunction(value string, fn functionType) string {
+	switch fn {
+	case functionHas:
+		return strconv.FormatBool(value != "")
+	case functionLen:
+		return strconv.Itoa(len(value))
+	default:
+		return value
+	}
+}

config/endpoint/placeholder_test.go

@@ -0,0 +1,125 @@
+package endpoint
+
+import (
+	"testing"
+	"time"
+
+	"github.com/TwiN/gatus/v5/config/gontext"
+)
+
+func TestResolvePlaceholder(t *testing.T) {
+	result := &Result{
+		HTTPStatus:            200,
+		IP:                    "127.0.0.1",
+		Duration:              250 * time.Millisecond,
+		DNSRCode:              "NOERROR",
+		Connected:             true,
+		CertificateExpiration: 30 * 24 * time.Hour,
+		DomainExpiration:      365 * 24 * time.Hour,
+		Body:                  []byte(`{"status":"success","items":[1,2,3],"user":{"name":"john","id":123}}`),
+	}
+
+	ctx := gontext.New(map[string]interface{}{
+		"user_id":       "abc123",
+		"session_token": "xyz789",
+		"array_data":    []interface{}{"a", "b", "c"},
+		"nested": map[string]interface{}{
+			"value": "test",
+		},
+	})
+
+	tests := []struct {
+		name        string
+		placeholder string
+		expected    string
+	}{
+		// Basic placeholders
+		{"status", "[STATUS]", "200"},
+		{"ip", "[IP]", "127.0.0.1"},
+		{"response-time", "[RESPONSE_TIME]", "250"},
+		{"dns-rcode", "[DNS_RCODE]", "NOERROR"},
+		{"connected", "[CONNECTED]", "true"},
+		{"certificate-expiration", "[CERTIFICATE_EXPIRATION]", "2592000000"},
+		{"domain-expiration", "[DOMAIN_EXPIRATION]", "31536000000"},
+		{"body", "[BODY]", `{"status":"success","items":[1,2,3],"user":{"name":"john","id":123}}`},
+
+		// Case insensitive placeholders
+		{"status-lowercase", "[status]", "200"},
+		{"ip-mixed-case", "[Ip]", "127.0.0.1"},
+
+		// Function wrappers on basic placeholders
+		{"len-status", "len([STATUS])", "3"},
+		{"len-ip", "len([IP])", "9"},
+		{"has-status", "has([STATUS])", "true"},
+		{"has-empty", "has()", "false"},
+
+		// JSONPath expressions
+		{"body-status", "[BODY].status", "success"},
+		{"body-user-name", "[BODY].user.name", "john"},
+		{"body-user-id", "[BODY].user.id", "123"},
+		{"len-body-items", "len([BODY].items)", "3"},
+		{"body-array-index", "[BODY].items[0]", "1"},
+		{"has-body-status", "has([BODY].status)", "true"},
+		{"has-body-missing", "has([BODY].missing)", "false"},
+
+		// Context placeholders
+		{"context-user-id", "[CONTEXT].user_id", "abc123"},
+		{"context-session-token", "[CONTEXT].session_token", "xyz789"},
+		{"context-nested", "[CONTEXT].nested.value", "test"},
+		{"len-context-array", "len([CONTEXT].array_data)", "3"},
+		{"has-context-user-id", "has([CONTEXT].user_id)", "true"},
+		{"has-context-missing", "has([CONTEXT].missing)", "false"},
+
+		// Invalid placeholders
+		{"unknown-placeholder", "[UNKNOWN]", "[UNKNOWN]"},
+		{"len-unknown", "len([UNKNOWN])", "len([UNKNOWN]) (INVALID)"},
+		{"has-unknown", "has([UNKNOWN])", "false"},
+		{"invalid-jsonpath", "[BODY].invalid.path", "[BODY].invalid.path (INVALID)"},
+
+		// Literal strings
+		{"literal-string", "literal", "literal"},
+		{"number-string", "123", "123"},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			actual, err := ResolvePlaceholder(test.placeholder, result, ctx)
+			if err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+			if actual != test.expected {
+				t.Errorf("expected '%s', got '%s'", test.expected, actual)
+			}
+		})
+	}
+}
+
+func TestResolvePlaceholderWithoutContext(t *testing.T) {
+	result := &Result{
+		HTTPStatus: 404,
+		Body:       []byte(`{"error":"not found"}`),
+	}
+
+	tests := []struct {
+		name        string
+		placeholder string
+		expected    string
+	}{
+		{"status-without-context", "[STATUS]", "404"},
+		{"body-without-context", "[BODY].error", "not found"},
+		{"context-without-context", "[CONTEXT].user_id", "[CONTEXT].user_id"},
+		{"has-context-without-context", "has([CONTEXT].user_id)", "false"},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			actual, err := ResolvePlaceholder(test.placeholder, result, nil)
+			if err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+			if actual != test.expected {
+				t.Errorf("expected '%s', got '%s'", test.expected, actual)
+			}
+		})
+	}
+}

config/endpoint/result.go

@@ -4,7 +4,7 @@ import (
 	"time"
 )
 
-// Result of the evaluation of a Endpoint
+// Result of the evaluation of an Endpoint
 type Result struct {
 	// HTTPStatus is the HTTP response status code
 	HTTPStatus int `json:"status,omitempty"`
@@ -54,6 +54,13 @@ type Result struct {
 	// Below is used only for the UI and is not persisted in the storage //
 	///////////////////////////////////////////////////////////////////////
 	port string `yaml:"-"` // used for endpoints[].ui.hide-port
+
+	///////////////////////////////////
+	// BELOW IS ONLY USED FOR SUITES //
+	///////////////////////////////////
+	// Name of the endpoint (ONLY USED FOR SUITES)
+	// Group is not needed because it's inherited from the suite
+	Name string `json:"name,omitempty"`
 }
 
 // AddError adds an error to the result's list of errors.
@@ -65,5 +72,5 @@ func (r *Result) AddError(error string) {
 			return
 		}
 	}
-	r.Errors = append(r.Errors, error)
+	r.Errors = append(r.Errors, error+"")
 }

config/endpoint/status.go

@@ -1,6 +1,9 @@
 package endpoint
 
+import "github.com/TwiN/gatus/v5/config/key"
+
 // Status contains the evaluation Results of an Endpoint
+// This is essentially a DTO
 type Status struct {
 	// Name of the endpoint
 	Name string `json:"name,omitempty"`
@@ -30,7 +33,7 @@ func NewStatus(group, name string) *Status {
 	return &Status{
 		Name:    name,
 		Group:   group,
-		Key:     ConvertGroupAndEndpointNameToKey(group, name),
+		Key:     key.ConvertGroupAndNameToKey(group, name),
 		Results: make([]*Result, 0),
 		Events:  make([]*Event, 0),
 		Uptime:  NewUptime(),

config/gontext/gontext.go

@@ -0,0 +1,121 @@
+package gontext
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"sync"
+)
+
+var (
+	// ErrGontextPathNotFound is returned when a gontext path doesn't exist
+	ErrGontextPathNotFound = errors.New("gontext path not found")
+)
+
+// Gontext holds values that can be shared between endpoints in a suite
+type Gontext struct {
+	mu     sync.RWMutex
+	values map[string]interface{}
+}
+
+// New creates a new gontext with initial values
+func New(initial map[string]interface{}) *Gontext {
+	if initial == nil {
+		initial = make(map[string]interface{})
+	}
+	// Create a deep copy to avoid external modifications
+	values := make(map[string]interface{})
+	for k, v := range initial {
+		values[k] = deepCopyValue(v)
+	}
+	return &Gontext{
+		values: values,
+	}
+}
+
+// Get retrieves a value from the gontext using dot notation
+func (g *Gontext) Get(path string) (interface{}, error) {
+	g.mu.RLock()
+	defer g.mu.RUnlock()
+	parts := strings.Split(path, ".")
+	current := interface{}(g.values)
+	for _, part := range parts {
+		switch v := current.(type) {
+		case map[string]interface{}:
+			val, exists := v[part]
+			if !exists {
+				return nil, fmt.Errorf("%w: %s", ErrGontextPathNotFound, path)
+			}
+			current = val
+		default:
+			return nil, fmt.Errorf("%w: %s", ErrGontextPathNotFound, path)
+		}
+	}
+	return current, nil
+}
+
+// Set stores a value in the gontext using dot notation
+func (g *Gontext) Set(path string, value interface{}) error {
+	g.mu.Lock()
+	defer g.mu.Unlock()
+	parts := strings.Split(path, ".")
+	if len(parts) == 0 {
+		return errors.New("empty path")
+	}
+	// Navigate to the parent of the target
+	current := g.values
+	for i := 0; i < len(parts)-1; i++ {
+		part := parts[i]
+		if next, exists := current[part]; exists {
+			if nextMap, ok := next.(map[string]interface{}); ok {
+				current = nextMap
+			} else {
+				// Path exists but is not a map, create a new map
+				newMap := make(map[string]interface{})
+				current[part] = newMap
+				current = newMap
+			}
+		} else {
+			// Create intermediate maps
+			newMap := make(map[string]interface{})
+			current[part] = newMap
+			current = newMap
+		}
+	}
+	// Set the final value
+	current[parts[len(parts)-1]] = value
+	return nil
+}
+
+// GetAll returns a copy of all gontext values
+func (g *Gontext) GetAll() map[string]interface{} {
+	g.mu.RLock()
+	defer g.mu.RUnlock()
+
+	result := make(map[string]interface{})
+	for k, v := range g.values {
+		result[k] = deepCopyValue(v)
+	}
+	return result
+}
+
+// deepCopyValue creates a deep copy of a value
+func deepCopyValue(v interface{}) interface{} {
+	switch val := v.(type) {
+	case map[string]interface{}:
+		newMap := make(map[string]interface{})
+		for k, v := range val {
+			newMap[k] = deepCopyValue(v)
+		}
+		return newMap
+	case []interface{}:
+		newSlice := make([]interface{}, len(val))
+		for i, v := range val {
+			newSlice[i] = deepCopyValue(v)
+		}
+		return newSlice
+	default:
+		// For primitive types, return as-is (they're passed by value anyway)
+		return val
+	}
+}

config/gontext/gontext_test.go

@@ -0,0 +1,448 @@
+package gontext
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestNew(t *testing.T) {
+	tests := []struct {
+		name     string
+		initial  map[string]interface{}
+		expected map[string]interface{}
+	}{
+		{
+			name:     "nil-input",
+			initial:  nil,
+			expected: make(map[string]interface{}),
+		},
+		{
+			name:     "empty-input",
+			initial:  make(map[string]interface{}),
+			expected: make(map[string]interface{}),
+		},
+		{
+			name: "simple-values",
+			initial: map[string]interface{}{
+				"key1": "value1",
+				"key2": 42,
+			},
+			expected: map[string]interface{}{
+				"key1": "value1",
+				"key2": 42,
+			},
+		},
+		{
+			name: "nested-values",
+			initial: map[string]interface{}{
+				"user": map[string]interface{}{
+					"id":   123,
+					"name": "John Doe",
+				},
+			},
+			expected: map[string]interface{}{
+				"user": map[string]interface{}{
+					"id":   123,
+					"name": "John Doe",
+				},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctx := New(tt.initial)
+			if ctx == nil {
+				t.Error("Expected non-nil gontext")
+			}
+			if ctx.values == nil {
+				t.Error("Expected non-nil values map")
+			}
+
+			// Verify deep copy by modifying original
+			if tt.initial != nil {
+				tt.initial["modified"] = "should not appear"
+				if _, exists := ctx.values["modified"]; exists {
+					t.Error("Deep copy failed - original map modification affected gontext")
+				}
+			}
+		})
+	}
+}
+
+func TestGontext_Get(t *testing.T) {
+	ctx := New(map[string]interface{}{
+		"simple":  "value",
+		"number":  42,
+		"boolean": true,
+		"nested": map[string]interface{}{
+			"level1": map[string]interface{}{
+				"level2": "deep_value",
+			},
+		},
+		"user": map[string]interface{}{
+			"id":   123,
+			"name": "John",
+			"profile": map[string]interface{}{
+				"email": "john@example.com",
+			},
+		},
+	})
+
+	tests := []struct {
+		name        string
+		path        string
+		expected    interface{}
+		shouldError bool
+		errorType   error
+	}{
+		{
+			name:        "simple-value",
+			path:        "simple",
+			expected:    "value",
+			shouldError: false,
+		},
+		{
+			name:        "number-value",
+			path:        "number",
+			expected:    42,
+			shouldError: false,
+		},
+		{
+			name:        "boolean-value",
+			path:        "boolean",
+			expected:    true,
+			shouldError: false,
+		},
+		{
+			name:        "nested-value",
+			path:        "nested.level1.level2",
+			expected:    "deep_value",
+			shouldError: false,
+		},
+		{
+			name:        "user-id",
+			path:        "user.id",
+			expected:    123,
+			shouldError: false,
+		},
+		{
+			name:        "deep-nested-value",
+			path:        "user.profile.email",
+			expected:    "john@example.com",
+			shouldError: false,
+		},
+		{
+			name:        "non-existent-key",
+			path:        "nonexistent",
+			expected:    nil,
+			shouldError: true,
+			errorType:   ErrGontextPathNotFound,
+		},
+		{
+			name:        "non-existent-nested-key",
+			path:        "user.nonexistent",
+			expected:    nil,
+			shouldError: true,
+			errorType:   ErrGontextPathNotFound,
+		},
+		{
+			name:        "invalid-nested-path",
+			path:        "simple.invalid",
+			expected:    nil,
+			shouldError: true,
+			errorType:   ErrGontextPathNotFound,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result, err := ctx.Get(tt.path)
+
+			if tt.shouldError {
+				if err == nil {
+					t.Errorf("Expected error but got none")
+				}
+				if tt.errorType != nil && !errors.Is(err, tt.errorType) {
+					t.Errorf("Expected error type %v, got %v", tt.errorType, err)
+				}
+			} else {
+				if err != nil {
+					t.Errorf("Unexpected error: %v", err)
+				}
+				if result != tt.expected {
+					t.Errorf("Expected %v, got %v", tt.expected, result)
+				}
+			}
+		})
+	}
+}
+
+func TestGontext_Set(t *testing.T) {
+	tests := []struct {
+		name    string
+		path    string
+		value   interface{}
+		wantErr bool
+	}{
+		{
+			name:    "simple-set",
+			path:    "key",
+			value:   "value",
+			wantErr: false,
+		},
+		{
+			name:    "nested-set",
+			path:    "user.name",
+			value:   "John Doe",
+			wantErr: false,
+		},
+		{
+			name:    "deep-nested-set",
+			path:    "user.profile.email",
+			value:   "john@example.com",
+			wantErr: false,
+		},
+		{
+			name:    "override-primitive-with-nested",
+			path:    "existing.new",
+			value:   "nested_value",
+			wantErr: false,
+		},
+		{
+			name:    "empty-path",
+			path:    "",
+			value:   "value",
+			wantErr: false, // Actually, empty string creates a single part [""], which is valid
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctx := New(map[string]interface{}{
+				"existing": "primitive",
+			})
+
+			err := ctx.Set(tt.path, tt.value)
+
+			if tt.wantErr {
+				if err == nil {
+					t.Error("Expected error but got none")
+				}
+				return
+			}
+
+			if err != nil {
+				t.Errorf("Unexpected error: %v", err)
+				return
+			}
+
+			// Verify the value was set correctly
+			result, getErr := ctx.Get(tt.path)
+			if getErr != nil {
+				t.Errorf("Error retrieving set value: %v", getErr)
+				return
+			}
+
+			if result != tt.value {
+				t.Errorf("Expected %v, got %v", tt.value, result)
+			}
+		})
+	}
+}
+
+func TestGontext_SetOverrideBehavior(t *testing.T) {
+	ctx := New(map[string]interface{}{
+		"primitive": "value",
+		"nested": map[string]interface{}{
+			"key": "existing",
+		},
+	})
+
+	// Test overriding primitive with nested structure
+	err := ctx.Set("primitive.new", "nested_value")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	// Verify the primitive was replaced with a nested structure
+	result, err := ctx.Get("primitive.new")
+	if err != nil {
+		t.Errorf("Error getting nested value: %v", err)
+	}
+	if result != "nested_value" {
+		t.Errorf("Expected 'nested_value', got %v", result)
+	}
+
+	// Test overriding existing nested value
+	err = ctx.Set("nested.key", "modified")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	result, err = ctx.Get("nested.key")
+	if err != nil {
+		t.Errorf("Error getting modified value: %v", err)
+	}
+	if result != "modified" {
+		t.Errorf("Expected 'modified', got %v", result)
+	}
+}
+
+func TestGontext_GetAll(t *testing.T) {
+	initial := map[string]interface{}{
+		"key1": "value1",
+		"key2": 42,
+		"nested": map[string]interface{}{
+			"inner": "value",
+		},
+	}
+
+	ctx := New(initial)
+
+	// Add another value after creation
+	ctx.Set("key3", "value3")
+
+	result := ctx.GetAll()
+
+	// Verify all values are present
+	if result["key1"] != "value1" {
+		t.Errorf("Expected key1=value1, got %v", result["key1"])
+	}
+	if result["key2"] != 42 {
+		t.Errorf("Expected key2=42, got %v", result["key2"])
+	}
+	if result["key3"] != "value3" {
+		t.Errorf("Expected key3=value3, got %v", result["key3"])
+	}
+
+	// Verify nested values
+	nested, ok := result["nested"].(map[string]interface{})
+	if !ok {
+		t.Error("Expected nested to be map[string]interface{}")
+	} else if nested["inner"] != "value" {
+		t.Errorf("Expected nested.inner=value, got %v", nested["inner"])
+	}
+
+	// Verify deep copy - modifying returned map shouldn't affect gontext
+	result["key1"] = "modified"
+	original, _ := ctx.Get("key1")
+	if original != "value1" {
+		t.Error("GetAll did not return a deep copy - modification affected original")
+	}
+}
+
+func TestGontext_ConcurrentAccess(t *testing.T) {
+	ctx := New(map[string]interface{}{
+		"counter": 0,
+	})
+
+	done := make(chan bool, 10)
+
+	// Start 5 goroutines that read values
+	for i := 0; i < 5; i++ {
+		go func(id int) {
+			for j := 0; j < 100; j++ {
+				_, err := ctx.Get("counter")
+				if err != nil {
+					t.Errorf("Reader %d error: %v", id, err)
+				}
+			}
+			done <- true
+		}(i)
+	}
+
+	// Start 5 goroutines that write values
+	for i := 0; i < 5; i++ {
+		go func(id int) {
+			for j := 0; j < 100; j++ {
+				err := ctx.Set("counter", id*1000+j)
+				if err != nil {
+					t.Errorf("Writer %d error: %v", id, err)
+				}
+			}
+			done <- true
+		}(i)
+	}
+
+	// Wait for all goroutines to complete
+	for i := 0; i < 10; i++ {
+		<-done
+	}
+}
+
+func TestDeepCopyValue(t *testing.T) {
+	tests := []struct {
+		name  string
+		input interface{}
+	}{
+		{
+			name:  "primitive-string",
+			input: "test",
+		},
+		{
+			name:  "primitive-int",
+			input: 42,
+		},
+		{
+			name:  "primitive-bool",
+			input: true,
+		},
+		{
+			name: "simple-map",
+			input: map[string]interface{}{
+				"key": "value",
+			},
+		},
+		{
+			name: "nested-map",
+			input: map[string]interface{}{
+				"nested": map[string]interface{}{
+					"deep": "value",
+				},
+			},
+		},
+		{
+			name:  "simple-slice",
+			input: []interface{}{"a", "b", "c"},
+		},
+		{
+			name: "mixed-slice",
+			input: []interface{}{
+				"string",
+				42,
+				map[string]interface{}{"nested": "value"},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := deepCopyValue(tt.input)
+
+			// For maps and slices, verify it's a different object
+			switch v := tt.input.(type) {
+			case map[string]interface{}:
+				resultMap, ok := result.(map[string]interface{})
+				if !ok {
+					t.Error("Deep copy didn't preserve map type")
+					return
+				}
+				// Modify original to ensure independence
+				v["modified"] = "test"
+				if _, exists := resultMap["modified"]; exists {
+					t.Error("Deep copy failed - maps are not independent")
+				}
+			case []interface{}:
+				resultSlice, ok := result.([]interface{})
+				if !ok {
+					t.Error("Deep copy didn't preserve slice type")
+					return
+				}
+				if len(resultSlice) != len(v) {
+					t.Error("Deep copy didn't preserve slice length")
+				}
+			}
+		})
+	}
+}

config/key/key.go

@@ -1,10 +1,10 @@
-package endpoint
+package key
 
 import "strings"
 
-// ConvertGroupAndEndpointNameToKey converts a group and an endpoint to a key
-func ConvertGroupAndEndpointNameToKey(groupName, endpointName string) string {
-	return sanitize(groupName) + "_" + sanitize(endpointName)
+// ConvertGroupAndNameToKey converts a group and a name to a key
+func ConvertGroupAndNameToKey(groupName, name string) string {
+	return sanitize(groupName) + "_" + sanitize(name)
 }
 
 func sanitize(s string) string {
@@ -16,4 +16,4 @@ func sanitize(s string) string {
 	s = strings.ReplaceAll(s, " ", "-")
 	s = strings.ReplaceAll(s, "#", "-")
 	return s
-}
+}

config/key/key_bench_test.go

@@ -0,0 +1,11 @@
+package key
+
+import (
+	"testing"
+)
+
+func BenchmarkConvertGroupAndNameToKey(b *testing.B) {
+	for n := 0; n < b.N; n++ {
+		ConvertGroupAndNameToKey("group", "name")
+	}
+}

config/key/key_test.go

@@ -1,33 +1,38 @@
-package endpoint
+package key
 
 import "testing"
 
-func TestConvertGroupAndEndpointNameToKey(t *testing.T) {
+func TestConvertGroupAndNameToKey(t *testing.T) {
 	type Scenario struct {
 		GroupName      string
-		EndpointName   string
+		Name           string
 		ExpectedOutput string
 	}
 	scenarios := []Scenario{
 		{
 			GroupName:      "Core",
-			EndpointName:   "Front End",
+			Name:           "Front End",
 			ExpectedOutput: "core_front-end",
 		},
 		{
 			GroupName:      "Load balancers",
-			EndpointName:   "us-west-2",
+			Name:           "us-west-2",
 			ExpectedOutput: "load-balancers_us-west-2",
 		},
 		{
 			GroupName:      "a/b test",
-			EndpointName:   "a",
+			Name:           "a",
 			ExpectedOutput: "a-b-test_a",
 		},
+		{
+			GroupName:      "",
+			Name:           "name",
+			ExpectedOutput: "_name",
+		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.ExpectedOutput, func(t *testing.T) {
-			output := ConvertGroupAndEndpointNameToKey(scenario.GroupName, scenario.EndpointName)
+			output := ConvertGroupAndNameToKey(scenario.GroupName, scenario.Name)
 			if output != scenario.ExpectedOutput {
 				t.Errorf("expected '%s', got '%s'", scenario.ExpectedOutput, output)
 			}