How to test Clerk webhooks locally

See Clerk user lifecycle events (user.created, session.created) as they fire, and forward them to your local handler to test just-in-time user sync.

1. 1
   Create a free RelayFox URL on the homepage (no signup needed).
2. 2
   Paste it as your webhook endpoint: Clerk Dashboard → Webhooks → Add Endpoint.
3. 3
   Trigger an event (e.g. user.created) and watch it arrive live in RelayFox.
4. 4
   Run the CLI to forward captured events to your local server:

   npx relayfox forward <endpoint-id> --to http://localhost:3000 --token rfx_...

5. 5
   Inspect headers, body and replay any event as many times as you need.

RelayFox preserves the svix-signature header when forwarding, so Clerk's signature verification works against your local server unchanged.