Webhook Debugging Guide
Learn how to debug webhooks effectively. Understand webhook concepts, common issues, and how to use our free webhook debugging tool.
What is a Webhook?
A webhook is an HTTP callback that sends real-time data from one application to another when an event occurs. Unlike polling (where you repeatedly check for updates), webhooks deliver data instantly as events happen.
Common webhook use cases: GitHub pushes, Stripe payments, Slack notifications, CI/CD pipeline events, and form submissions.
Common Webhook Debugging Issues
Network connectivity: The receiving server must be reachable from the internet. Firewalls and VPNs can block webhook delivery.
Payload format mismatch: The sender and receiver must agree on the payload format (JSON, XML, form-encoded).
Authentication failures: Many webhooks use secret tokens or signatures to verify authenticity. Rejections occur on mismatch.
Timeout errors: If the receiver takes too long to respond, the sender may retry or drop the webhook.
SSL/TLS issues: Most webhook senders require HTTPS endpoints with valid certificates.