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Alerts

How are webhook alerts signed?

Verify HMAC-SHA256 against the received request body.

Premium webhook alerts include an HMAC-SHA256 signature in X-Cheapmonit-Signature, using the channel’s signing secret. The secret is shown once when the channel is created.

Validate the received body’s signature before processing it, and deduplicate by event ID. Retries carry the same ID. Webhook alerts do not contain acknowledgement links.

Step-by-step documentationSigned webhook notificationsReceive alert events at your HTTPS endpoint and verify their sender. Back to all questions