REST API Tester
Send HTTP requests and inspect responses.
Some APIs may block requests due to CORS policies. This is a browser restriction, not a tool limitation.
Frequently Asked Questions
Why do some API requests fail with a CORS error? +
Browsers enforce CORS (Cross-Origin Resource Sharing) policies. If the target API does not include CORS headers in its response, the browser blocks the request. This is a browser security feature, not a bug in the tool.
What HTTP methods are supported? +
GET, POST, PUT, PATCH, and DELETE are all supported. Select the method from the dropdown before sending your request. The body editor is available for methods that accept a request body.
How do I send JSON in the request body? +
Type or paste your JSON into the body editor. Make sure to add a Content-Type: application/json header so the server knows to parse it as JSON.
Can I see the response headers? +
Yes. After a successful request, the response section shows both headers and body. Note that browsers may limit which headers are visible due to CORS restrictions.