API Client & REST Tester
Build and send HTTP requests — set the method, params, headers, and body, then inspect the status, timing, headers, and formatted response. A Postman-style client, right in your browser.
Requests are proxied through this site to bypass browser CORS. Internal/private addresses are blocked, with a 15s timeout and a 3 MB response cap.
Frequently asked questions
Why does this work when other browser API testers get CORS errors?+
Requests are sent through a secure server-side proxy on this site, so browser CORS restrictions don't block them. Internal and private addresses are blocked, with a timeout and response-size cap for safety.
Which HTTP methods are supported?+
GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS — with custom query params, headers, and a request body.
Is my request data stored?+
No. Requests are proxied and returned to you, not saved. Your recent-request list lives only in your own browser (localStorage).
Can I call authenticated APIs?+
Yes — add an Authorization header (or any custom header) in the Headers tab. Your credentials pass straight through to the target API and are never stored.
Building or integrating an API?
We design and build production APIs, integrations, and backends. If you're wiring systems together, tell us what you need.
Prefer to chat? Contact us