How to use Performance Test Rest API
- Add the API URL to Performance Test Rest API and choose how many timed runs.
- Press run and Performance Test Rest API sends the requests from your browser, timing each one.
- Review the latency summary and status Performance Test Rest API shows.
About this tool
Performance Test Rest API runs in your browser with no backend of its own. Performance Test Rest API fires a capped series of requests at the URL you enter and reports how long they take, right from your browser.
There is no backend here — the requests and timing happen in your browser, and only the target server sees the traffic. The timed requests are sent from your browser to the endpoint you enter; this site has no backend and never receives them, though that server and your network do. Cross-origin endpoints must allow CORS, and a connection is required.
Frequently asked questions
How do I use Performance Test Rest API?
Performance Test Rest API measures response time by sending a capped series of requests from your browser to the endpoint you enter and reporting min, average and max latency with status and size.
Is Performance Test Rest API free to use?
Yes — Performance Test Rest API is completely free, with no usage limits.
Does Performance Test Rest API send requests anywhere?
Yes — Performance Test Rest API sends repeated requests from your browser to the URL you enter and times them. This site has no backend and never sees them; the target server does, and cross-origin endpoints must allow CORS.
Why might Performance Test Rest API fail to reach my endpoint?
Because the request runs in your browser, a cross-origin API must return permissive CORS headers or the browser blocks the response. That is a browser rule, not a limit of Performance Test Rest API; same-origin or CORS-enabled endpoints time fine.