# Webhook endpoints

> Implement and authenticate external callbacks in your Worker.

- Canonical page: https://docs.userland.fun/guides/webhooks/
- Docs index for agents: https://docs.userland.fun/llms.txt

> **For agents:** Read the [complete native guide](/native-guide.md) and current `context.get` capabilities. Use only implemented operations and preserve exact Account, app and environment authority.

A native Worker can handle HTTP callbacks using ordinary request handlers when external reachability is authorized. Implement the provider's signature verification, replay/idempotency rules, bounded body handling and app authorization. Store provider secrets through protected entry.

Userland does not provision the retired custom-runtime webhook resource in this profile. Declaring a callback handler does not register it with an external service or grant broader network access to a hosted build/browser. Report and complete actual external dependencies deliberately.