Test Notion webhooks
Notion sends webhooks for page, database, data source, and comment events in workspaces an integration can access. Capture them on a free webhooks.cc endpoint to see exactly what Notion sends, then replay deliveries or forward them to your local handler.
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Prefer a walkthrough? Read the local webhook testing guide.
How to test Notion webhooks
- 1
Create a webhook endpoint
Sign in free with GitHub, Google, or email to create a persistent endpoint — or grab an instant guest URL at webhooks.cc without an account.
- 2
Point Notion at your URL
Paste the endpoint URL into Notion: Integration settings → Webhooks → Create subscription.
- 3
Inspect what arrives
Each delivery appears live in the dashboard with method, headers, body, query parameters, and source IP.
- 4
Forward to localhost or assert in CI
Run whk tunnel <port> to forward webhooks to a local server, or use the TypeScript SDK to wait for and assert on deliveries in tests.
Notion webhook authentication
| Auth header | x-notion-signature |
|---|---|
| Algorithm | HMAC-SHA256 |
| Verification in webhooks.cc | Capture deliveries to inspect raw signature material |
Notion first sends a one-time verification request with a verification_token, which you paste back into the integration settings. That token is also the HMAC key for later deliveries.
New to signature verification? Read the webhook signature verification guide.
Everything in one place
- Live dashboard — see deliveries the moment they arrive
- Forward to localhost with whk tunnel
- Replay any captured request to any URL
- Mock responses with custom status, headers, and body
- TypeScript SDK assertions for CI
- MCP server for AI coding agents
Notion webhook questions
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Sign up free, create an endpoint, and point Notion at it.
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