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API Tester

Test HTTP APIs with custom methods, headers and body

About API Tester

Test HTTP APIs directly in your browser — send GET, POST, PUT, DELETE requests with custom headers and body, and inspect response details.

How to use API Tester

  1. 1Enter the API endpoint URL in the address bar.
  2. 2Select the HTTP method (GET, POST, PUT, DELETE, PATCH, etc.).
  3. 3Add custom headers in key: value format, one per line (e.g., Authorization: Bearer token).
  4. 4For POST/PUT requests, enter the request body in JSON or other format.
  5. 5Click 'Send' and review the response headers, body, and performance indicator.
  6. 6Use 'Copy as cURL' to reproduce the request in your terminal.

Tips

  • Check the performance indicator (Fast/Medium/Slow) to quickly gauge API response times.
  • Your request history is saved locally — revisit previous calls without re-entering details.
  • Use the Copy as cURL feature to share exact requests with teammates for debugging.

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OneKitTools TeamUpdated 2.21.4