Free tool
Basic rate limit tester for browser-accessible APIs.
Run a small burst of requests and look for 429 responses, average latency shifts, and browser-visible throttling behavior. This is a quick client-side signal, not a substitute for production load testing.
When to use this
- Confirm whether an internet-facing endpoint returns 429 responses.
- Compare behavior before and after gateway or CDN policy changes.
- Give developers a lightweight pre-check before deeper server-side testing.
If the browser cannot reach the endpoint due to CORS, use curl or your API client and verify throttling behavior there.
Run a small burst test to see whether your API returns 429 responses or custom limit headers.