BlogSnyk Webhooks

How to Test Snyk Webhooks

Snyk webhooks notify your security tools when new vulnerabilities are found or when project test results change.

Snyk Official Webhook Docs

1. Snyk Webhook Events

Snyk can send the following webhook events to your endpoint:

project_snapshot/v0/test
project/v0/activated
project/v0/deactivated

2. Set Up a Test Endpoint with HookRay

Follow these steps to start receiving Snyk 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 Snyk 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 Snyk Webhook Payload

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

payload.json
{
  "project": {
    "id": "abc123-def456-ghi789",
    "name": "acme/hookray",
    "type": "npm",
    "origin": "github"
  },
  "newIssues": [
    {
      "id": "SNYK-JS-LODASH-590103",
      "issueType": "vuln",
      "pkgName": "lodash",
      "severity": "high",
      "title": "Prototype Pollution"
    }
  ],
  "removedIssues": []
}

4. Common Issues & Troubleshooting

Webhook not arriving?

Check that your endpoint URL is correct and publicly accessible. Snyk 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 Snyk's side. Check your webhook configuration and event selection.

Need to verify webhook signatures?

Snyk 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 Snyk-specific fields highlighted automatically
  • Check the Snyk webhook documentation for the complete event reference

Ready to test Snyk webhooks?

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