Verify Clerk webhook signatures using Svix headers and process events.
npx skills add https://github.com/hookdeck/webhook-skills --skill clerk-webhooks
Please help me install this Agent Skill. Skill: clerk-webhooks Source: https://github.com/hookdeck/webhook-skills/tree/main/skills/clerk-webhooks Command: npx skills add https://github.com/hookdeck/webhook-skills --skill clerk-webhooks
This Skill helps you quickly set up secure Clerk webhook endpoints that validate signatures, filter events, and reliably process events like user.created, user.updated, session.created, and organization.created.
Use Clerk webhooks skill to verify and handle events by posting signed requests to your /webhooks/clerk endpoint, configure CLERK_WEBHOOK_SECRET=whsec_..., and run the provided Express/FastAPI/Next.js examples.
High-intent search queries and answers about installing and using this skill.
You verify Clerk webhook signatures in Next.js by checking Svix headers (svix-id, svix-timestamp, svix-signature) against your CLERK_WEBHOOK_SECRET. This ensures only authentic events are processed by your endpoint.
The replay window for validating Clerk webhooks is five minutes. Verifying the svix-timestamp header within this window prevents delayed or replayed requests from being processed by your application.
To handle user.created and user.updated events in FastAPI, set up an endpoint that verifies the Svix signature, then filters and routes the event payload to your application logic for reliable user data processing.
Yes, Clerk webhook signature verification supports multiple signatures. The validation logic checks the svix-signature header to correctly authenticate requests even when multiple signatures are present.
Yes, you need a whsec_ secret to secure Clerk webhooks in Express. Configure it as the CLERK_WEBHOOK_SECRET environment variable to enforce signature verification on incoming requests.
Clerk webhooks fail signature verification locally when the svix-signature header does not match your CLERK_WEBHOOK_SECRET. Use local testing guidance and verify environment variables to debug the request payload.
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