API Ping Tester
Test HTTP endpoints, measure latency, and inspect response headers — directly from your browser
Quick test — public APIs with CORS enabled:
Need to check if an API endpoint is up, measure response latency, or quickly inspect response headers without opening a terminal? Enter the URL, choose the HTTP method, add any headers you need, and fire the request — the tool shows status code, response time, and a full header table. Useful for health checks, debugging CORS issues, and verifying that a deployed service is responding correctly.
How to Test an API Endpoint
Enter the URL, pick the method, and send the request in one click.
Enter the endpoint URL
Type or paste the full URL including protocol (https://). The tool supports any publicly accessible HTTP or HTTPS endpoint.
Choose method and add headers
Select the HTTP method (GET, POST, PUT, PATCH, DELETE). Toggle the headers panel to add custom headers such as Authorization, Content-Type, or Accept.
Send and read the results
Click Ping. The results panel shows HTTP status code, status text, response time in milliseconds, and a table of all response headers.
Features
Supports GET, POST, PUT, PATCH, and DELETE methods
Measures response latency in milliseconds
Displays HTTP status code and status text
Shows full response header table
Custom request headers panel
Multiple ping attempts with per-attempt timings
Free, no sign-up, no proxy server required
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Frequently Asked Questions
Does this tool send requests through a proxy server?
Requests are sent directly from your browser using the Fetch API. There is no server-side proxy. This means the endpoint must be publicly accessible and must allow CORS requests from browser origins — private or localhost endpoints will not be reachable.
Why does my request fail with a CORS error?
Browsers enforce the Same-Origin Policy. If the target API does not include the correct CORS headers (Access-Control-Allow-Origin), the browser will block the response. This is a browser security restriction — the request does reach the server, but the browser refuses to read the response.
Can I test private or internal APIs?
Not directly — browser security prevents requests to private network addresses (192.168.x.x, localhost, etc.) from a public page. Use curl or Postman for internal API testing.
How is response time measured?
Response time is measured from the moment the Fetch request is dispatched to the moment the response headers are received (time to first byte), using performance.now() for high-resolution timing.