Last updated: March 2026
What Is the API Request Tester?
The API Request Tester is a free, browser-based tool for sending HTTP requests and inspecting responses — a lightweight alternative to Postman that requires no installation. Enter a URL, select a method (GET, POST, PUT, DELETE), add headers and body, send the request, and see the response with status code, formatted body, headers, and timing. Generate equivalent code in cURL, JavaScript, Python, and Node.js.
How to Test an API
Enter the API endpoint URL, select the HTTP method, add any required headers or authentication, write a request body (for POST/PUT), and click Send. The response panel shows the status code, response body (auto-formatted for JSON), headers, and request timing. Use the built-in test endpoints to try the tool immediately.
Frequently Asked Questions
Why am I getting CORS errors?
Most APIs don't allow requests from web browsers (for security). This tool works best with your own APIs, APIs that explicitly enable CORS, and public test APIs. For CORS-blocked APIs, use the generated cURL command in your terminal instead.
Is this a replacement for Postman?
For quick API testing, yes — no installation needed, works in any browser. For complex testing workflows, collections, and team collaboration, Postman is more full-featured. This tool excels at fast, ad-hoc API testing.
Can I test authenticated APIs?
Yes. Use the Auth tab to add Bearer tokens or Basic authentication. The credentials are added to the request headers automatically. Your credentials are never stored or sent anywhere other than the target API.
Can I generate code from my request?
Yes. Click 'Generate Code' to get the equivalent request in cURL, JavaScript (fetch), Python (requests), or Node.js (axios). Copy and paste into your project.
Is my request data saved?
Request history is stored in your browser session only. Clear it anytime. No data is sent to our servers — the request goes directly from your browser to the target API.