HMAC Authentication for Webhooks

Currently, the "Catch Webhook" feature only supports basic authentication, which limits compatibility with some SaaS platforms. For example, Formstack requires webhook authentication using an HMAC handshake. Expanding support for additional authentication methods, such as HMAC, would improve flexibility and integration with more services.

Expected Behavior:

• Support for HMAC authentication (as required by Formstack).

• Consider adding other commonly used authentication schemes for webhooks.

Reference: Formstack Webhook Security.