API Request Builder — Free Online Tool
Test API endpoints with custom HTTP methods, headers, query parameters, and request body. View formatted responses with syntax highlighting.
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How It Works
Enter the API URL, select the HTTP method, add headers and body as needed, then send the request. The response is displayed with syntax highlighting, status code, headers, and timing information.
Frequently Asked Questions
GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS are all supported. You can set custom headers, query parameters, and request body.
Yes. You can add authentication headers (Bearer token, API key, Basic auth) to your requests. Credentials stay in your browser.
Yes. Requests are sent directly from your browser to the API endpoint. Note that CORS restrictions may apply for some APIs.