Webhooks are powerful, but debugging them can be frustrating.
Unlike regular API requests, webhooks are sent by external systems, and when something goes wrong, it’s often unclear what actually happened.
In this guide, we’ll walk through how to debug webhooks step by step.
What Makes Webhooks Hard to Debug?
- You don’t control when requests are sent
- No UI to inspect incoming data
- Failures can be silent
- Payloads may differ between environments
Step 1: Verify Your Endpoint
Make sure your webhook endpoint is:
- Publicly accessible
- Returning a 200 OK response
- Not timing out
Step 2: Capture Incoming Requests
The most important step is to actually see what data is being sent.
Use a webhook capture tool to inspect:
- Headers
- Request body
- Event type
Step 3: Check Payload Structure
Compare the incoming payload with what your code expects.
Common issues:
- Missing fields
- Different data types
- Nested objects not handled correctly
Step 4: Validate Signatures
Many services (like payment gateways) send signed requests.
Make sure:
- You are using the raw request body
- The secret key is correct
- Signature verification logic is implemented properly
Step 5: Replay Webhook Requests
Instead of waiting for the event again, replay the webhook request to test your fixes.
This saves time and makes debugging faster.
Step 6: Log Everything
Always log:
- Incoming payload
- Headers
- Errors
Logs are your best friend when debugging production issues.
A Faster Way to Debug Webhooks
If you want to skip setup and debug quickly, you can use a webhook tester:
- Generate an instant webhook URL
- Capture incoming requests
- Inspect payload and headers
- Replay requests easily
No login. No setup.
Final Thoughts
Debugging webhooks doesn’t have to be complicated.
Once you can see what’s happening and replay requests, most issues become much easier to solve.
Focus on visibility, and the rest becomes straightforward.
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