Rule action: webhook

The webhook action sends a signed HTTP POST to your endpoint on each fire.

  1. Add a webhook action with the target URL.
  2. Optionally set a secret (used to sign the request) and custom headers.
  3. Save the rule.

Each request includes an X-Synacl-Signature: sha256=… header — an HMAC-SHA256 of the body using your secret. Verify it on your side to confirm the request is genuinely from Synacl; see verifying webhook signatures. Your endpoint should return a 2xx quickly. Repeated failures show up as action/failed events.

More in Rules & alerts
Create an alerting rule
Trigger in-app, email, webhook, or MQTT actions when a threshold is crossed.
Operators & thresholds
The comparison operators a rule can use and how scope works.
Severity & cooldown
Label urgency and prevent alert storms with a cooldown.
Rule action: email
Send an email to one or more recipients when a rule fires.
Rule action: MQTT publish
Publish to any MQTT broker when a rule fires.
User Actions & the action button
Save reusable webhook/MQTT actions and trigger them from a dashboard.