https protocol.
Zeal signs the webhook events it sends to your endpoints by including a unique Webhook Secret (of String type) in every request’s Puzzl-Signature header. This allows you to verify that the events were sent by Zeal. You can find your Webhook Secret and test your Webhooks on the API page of your Zeal dashboard. To verify a request from Zeal, check if the value from the Puzzl-Signature request’s header matches your Webhook Secret.