Linear webhook testing

Test Linear webhooks on localhost—without exposing a port.

Linear webhooks fire when issues, projects, or cycles change. Use RelayFox to capture these events during integration development without deploying your server. RelayFox keeps receiving if your laptop sleeps, so the original delivery is waiting when you reconnect.

No signup. Disposable URL lasts 24 hours.

Listening live

relayfox.dev/h/...

POSTnow

Issue

Linear-Signature: preserved

Forward when ready

npx relayfox forward <id> --to http://localhost:3000

Inspect the original headers and raw body.

Receive events while localhost is offline.

Forward through one free CLI command.

1
Create a free RelayFox URL above (no signup needed).
2
Paste it as your webhook endpoint: Linear → Settings → API → Webhooks → New webhook.
3
Trigger an event (e.g. Issue) and watch it arrive live in RelayFox.

Run the CLI to forward captured events to your local server:

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

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

RelayFox preserves the Linear-Signature header when forwarding, along with the captured body. Verify against the original raw body. If Linear includes the public destination URL in its signature, configure your verifier with the RelayFox capture URL rather than the localhost forwarding URL.

Ready for the next Linear event?

Create a disposable inbox and paste the URL into Linear.