$ cat ~/projects/webhookspy/README
WebhookSpy
Free, open-source webhook testing and debugging
- Role
- Creator · Developer
- Years
- 2025 – present
- Status
- Live
- Links
- webhookspy.com
The story
Every developer who integrates with a third-party API eventually needs to see exactly what a webhook is sending. WebhookSpy is a free, open-source tool for that.
An Elysia server on Bun catches requests and streams them to the inspector over server-sent events. Storage is SQLite by default, with Redis for cloud deployments.
Highlights
Permanent URLs
Your webhook URL never expires. Data clears after seven days of inactivity.
Live inspector
Requests appear instantly, with a sidebar list and a detailed headers and body view.
REST API
Query captured requests by method, path, body, or headers, documented with OpenAPI.
Secure endpoints
Optional access keys, rate limiting, and hardened security headers.
Built with
- Bun
- Elysia
- TypeScript
- Alpine.js
- Tailwind CSS
- Eleventy
- SQLite
- Redis