How to Test API Online

You can test API online in 3 steps: prepare URL, send request, inspect response.

3-step workflow

Choose method and enter request URL.
Add body/params if needed and send request.
Check status code and response body, then copy result.

Start API Test Open POST Example

Checklist before sending

Confirm base URL and environment
Set required headers (Auth, Content-Type)
Validate JSON body format
Keep timeout and retry strategy visible

Related guides

HTTP Status Code Guide API Request Error Fixes Postman Alternative Comparison API Testing FAQ