BlogLinear Webhooks

How to Test Linear Webhooks

Linear data change webhooks notify your service whenever issues, comments, projects, cycles, and related workflow objects change.

Linear Official Webhook Docs

1. Linear Webhook Events

Linear can send the following webhook events to your endpoint:

Issue
IssueComment
IssueAttachment
Project
ProjectUpdate
Cycle
Label

2. Set Up a Test Endpoint with HookRay

Follow these steps to start receiving Linear webhooks for testing:

  1. Go to HookRay and click "Start Testing — Free" to get your unique webhook URL.
  2. Copy the URL (e.g., https://h.hookray.com/abc123).
  3. In your Linear dashboard, navigate to the webhook settings and paste the HookRay URL as your endpoint.
  4. Select the events you want to receive (see list above).
  5. Trigger a test event — HookRay will show the incoming webhook in real-time.

3. Sample Linear Webhook Payload

Here's an example of what a Linear webhook payload looks like:

payload.json
{
  "action": "create",
  "type": "Issue",
  "createdAt": "2026-03-20T10:00:00.000Z",
  "data": {
    "id": "9f1f7a77-5579-4cdb-a5aa-1dfd72a2ce91",
    "identifier": "ENG-284",
    "title": "Investigate failed webhook deliveries",
    "priority": 2
  }
}

4. Common Issues & Troubleshooting

Webhook not arriving?

Check that your endpoint URL is correct and publicly accessible. Linear cannot reach localhost URLs — use HookRay's cloud URL instead.

Getting 400 or 500 errors?

HookRay accepts any payload and returns 200 OK by default, so the issue is likely on Linear's side. Check your webhook configuration and event selection.

Need to verify webhook signatures?

Linear signs webhook requests for security. Use HookRay to capture the raw headers and body, then implement signature verification in your application code.

5. Next Steps

  • Use HookRay's webhook replay feature to re-send captured webhooks while building your handler
  • Enable smart parsing (Pro plan) to see Linear-specific fields highlighted automatically
  • Check the Linear webhook documentation for the complete event reference

Ready to test Linear webhooks?

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