Examples / Cloud events: AWS, Google Cloud and Azure / AWS CloudWatch alarms (via SNS)

AWS CloudWatch alarms (via SNS) webhooks

Alarm state changes (ALARM, OK, INSUFFICIENT_DATA) for any metric, published to SNS.

Events

ALARM
OK
INSUFFICIENT_DATA

Signature

The SNS envelope is signed (SigningCertURL + Signature). The event is JSON inside the SNS Message string.

Retries

SNS delivery policy: 3 attempts by default, configurable.

See a retry schedule in the calculator.

Docs

docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Al...

Checked 2026-10-09. Report a change.

Sample request from AWS CloudWatch alarms (via SNS)illustrative, shortened

Content-Typetext/plain; charset=UTF-8x-amz-sns-message-typeNotification

{
  "Type": "Notification",
  "Subject": "ALARM: \"shop-api-5xx\" in EU (Frankfurt)",
  "Message": "{\"AlarmName\":\"shop-api-5xx\",\"NewStateValue\":\"ALARM\",\"OldStateValue\":\"OK\",\"NewStateReason\":\"Threshold Crossed: 1 datapoint [7.2] was greater than 5.0\",\"StateChangeTime\":\"2026-10-09T06:34:00.000+0000\",\"Region\":\"EU (Frankfurt)\",\"Trigger\":{\"MetricName\":\"5XXError\",\"Namespace\":\"AWS/ApiGateway\",\"Threshold\":5.0}}",
  "Timestamp": "2026-10-09T06:34:01.000Z"
}

CloudWatch Logs subscription filters cannot post to a URL directly; route them through Lambda or Firehose, or use a metric filter + alarm.

Receive AWS CloudWatch alarms (via SNS) webhooks with webhooks.xyz

Create a bin. Paste its URL into AWS CloudWatch alarms (via SNS). Each request shows at once with its headers and body. Add your server as a destination, and deliveries retry when it is down. Request an invite.

More in cloud events: aws, google cloud and azure: AWS Budgets and Cost Anomaly Detection (via SNS), AWS CodePipeline and CodeBuild (via SNS or EventBridge), AWS EventBridge API destinations, AWS GuardDuty and Security Hub findings (via EventBridge), AWS S3 event notifications (via SNS), AWS SES notifications (via SNS), AWS SNS (HTTPS subscriptions), Azure DevOps service hooks, Azure Event Grid webhooks, Azure Logic Apps and Power Automate (HTTP action), Azure Monitor action group webhooks, Google Cloud Billing budgets (via Pub/Sub), Google Cloud Build notifications (via Pub/Sub), Google Cloud Monitoring alerting webhooks, Google Cloud Pub/Sub push subscriptions.