Choose an endpoint
Use a relative path on your verified domain. Select GET or POST with a JSON body and use disposable test data.
beta mode
API performance
Test your API under a defined load.
Load test verified GET and JSON POST endpoints. Measure latency, throughput, HTTP errors and response-time thresholds.
Set a workload
Choose concurrent virtual users or a target request rate. The service enforces concurrency and duration ceilings.
Read the bottlenecks
Compare p95 and p99 response times, connection timings, status codes and dropped demand. A test measures this workload rather than proving unlimited capacity.
Start testing
Create an account, verify your domain and select Load & API tests in your workspace.
What the report measures
See total requests, completed throughput, average response time, latency percentiles and HTTP errors. Sent and received data show transfer volume; timelines help reveal whether latency or failures rise during the run.
Virtual users or requests per second?
Virtual users model concurrent request loops. A request-rate profile attempts a chosen arrival rate within a concurrency cap. Slow responses can limit the rate actually achieved; dropped demand shows work the test could not start.
Check the same operation after a change
Keep the endpoint, method, payload and workload unchanged when comparing releases. A fast GET does not establish the capacity of a slower POST. Use test data for requests that change application state.
Premium and Business access
Premium includes up to 100 concurrent load users within hosted resource limits and 25 load tests per account window. Business adds evidence-specific technical guidance and approved customer resources. Both require authorization and verified targets.
Your next step starts here
Get started with LoadVM ↗Measure your API under load.
Choose an endpoint, request method and workload in your workspace.