How to Use the API Tester

Select your HTTP method (GET, POST, PUT, DELETE), enter any public or local API endpoint URL, add an optional JSON payload for mutation requests, and click Send Request. The tool executes the request natively in your browser and formats the returned JSON response.

Important Note on CORS (Cross-Origin Resource Sharing)

Because requests execute directly inside your browser, target APIs must allow Cross-Origin requests by supplying standard Access-Control-Allow-Origin: * headers. Most public APIs (e.g., GitHub, JSONPlaceholder, public Webhook endpoints) support CORS out of the box.

100% Browser-Based Execution

Your API keys, auth headers, and data payloads are never sent to a middleman proxy server. Requests originate directly from your IP address to the target host.