Webhook.site

Webhook.site is a free online tool that gives you a unique URL and email address to receive and inspect HTTP requests, webhooks, and emails in real time. When you create a URL, anything sent to it — whether a POST request, a GET with query parameters, or an email — shows up instantly in your browser. You can see the full headers, body, query strings, and even uploaded files. It's a straightforward way to see exactly what data third-party services are sending your way.

The tool goes beyond just inspection. You can configure how the URL responds, set status codes and content types, and even use custom actions to transform incoming data and forward it to another endpoint. The visual workflow builder lets you chain actions — like saving to Google Sheets, sending a Slack notification, or writing to a database — without writing code. There's also a CLI tool for bidirectional proxying to local environments, and an API for programmatic access to your request history. Paid accounts unlock unlimited requests, permanent URLs, multi-user support, and custom domains.

Webhook.site is built for developers and engineers who need to test integrations, debug webhook callbacks, or automate responses to incoming events. If you're building something that talks to external APIs — payment gateways, CI/CD pipelines, IoT devices — this tool removes the guesswork. It's also handy for QA teams verifying that payloads are structured correctly, or for DevOps engineers setting up monitoring triggers. The free tier is generous enough for casual testing, and the paid plans add production-grade reliability.