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API Response Time Tester
Test API endpoints and measure response times.
Send a request to see the response
About API Response Time Testing
Measure your API's performance by testing response times. Supports all HTTP methods, custom headers, and JSON request bodies.
About the API Response Time Tester
The API tester sends HTTP requests to an endpoint and measures how long it takes to answer, along with the status code and response body.
How to use it
- 1 Enter the endpoint URL and choose the method.
- 2 Add headers or a body if needed.
- 3 Send the request and review the timing and response.
Frequently asked questions
What is a good API response time?
Under 200 ms feels instant for most users. Over 1 second starts to feel slow.
Why are the first requests slower?
The first request has to set up DNS, TCP, and TLS connections, and the server may also be warming its caches.
Can I test private or localhost APIs?
No. Requests are made from our server, which cannot reach private networks or your localhost.