REST API Client
Send HTTP requests and inspect responses — a lightweight Postman alternative in your browser
This tool runs in the browser. APIs that do not allow CORS cannot be called.
Response
How to Use
- Enter the API URL and select the HTTP method.
- Add query parameters or headers if needed.
- For POST/PUT requests, enter the request body.
- Click Send to make the request and view the response.
FAQ
Why do some APIs return CORS errors?
CORS (Cross-Origin Resource Sharing) is a browser security policy. APIs must explicitly allow cross-origin requests. This tool runs in your browser, so APIs without CORS headers will be blocked.
What APIs can I test?
Any API that allows CORS, such as jsonplaceholder.typicode.com, httpbin.org, and most public APIs with CORS enabled.
What is SSE (Server-Sent Events)?
SSE is a standard that allows a server to push real-time updates to a browser over HTTP. It's commonly used for AI API streaming responses, live feeds, and notifications. Enable the Stream toggle to receive streaming responses.
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