Test & Validate
Performance Testing
Load test your APIs with real-world traffic. Ramp to millions of virtual users in the cloud and see exactly where they break.
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Simulate production traffic and find where your APIs break
The collection you built to design and functionally test your API is also your load test. No new scripts, no separate load-testing tool, no new language to learn: the tests you already wrote are the load test.
Load test your API
Point Collection Runner at a collection and generate load, locally or on Postman's cloud infrastructure. Postman ramps up virtual users, each looping through your requests in parallel and running your scripts and tests as it goes.
Simulate real traffic with load profiles
Choose Fixed, Ramp up, Spike, or Peak. Set an initial load and a maximum, and shape how virtual users arrive over the test.
Run performance tests on the CLI
Run load tests from the Postman CLI and gate the build on success criteria like response time and error rates. When a run misses the bar, the build fails and the regression never ships.
Describe the load and let Agent mode run it
Agent mode configures the load profile, runs your collection under increasing virtual users, tracks p95 latency and error rate at each step, and tells you the exact load where your API starts to break.
RESOURCES
Go deeper on performance testing
See performance testing on your own APIs
Chat with a Postman expert to see how teams load test their APIs by ramping virtual users, reading the metrics live, and finding the breaking point before their users do.
