# API Load Testing

> Work out how much traffic your API needs to handle, then throw it at a live endpoint: estimate requests per second from your expected users and response time, or run a real cloud load test with virtual users against a GET endpoint.

## Tools

- [RPS calculator](https://www.postman.com/tools/rps-calculator): The RPS calculator estimates the throughput in requests per second that a given number of concurrent virtual users will actually generate, so you can size a load test before running one instead of discovering the number afterwards.
- [API load test](https://www.postman.com/tools/api-load-test): API load test runs a real Postman performance run against a URL you enter — pick the number of virtual users and how long to run, and it reports latency, throughput and error rate from Postman’s cloud, no account needed.

## About

- No account is required and there is nothing to install. Each tool's Privacy section explains what stays in your browser and what is sent to Postman.
- [Postman Tools](https://www.postman.com/tools) — every tool, not just this group.
- [llms.txt](https://www.postman.com/tools/llms.txt) — the same index in llms.txt form.