Testing
API Rate Limit Checker
Inspect rate-limit responses and headers with safe request caps.
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What is API Rate Limit Checker?
The API Rate Limit Checker performs a small, controlled sequence of requests and looks for HTTP 429 responses and common rate-limit headers. It is designed for basic observation, not load testing.
What this tool checks
- HTTP 429 Too Many Requests
- Retry-After
- RateLimit-Limit and RateLimit-Remaining
- X-RateLimit-Limit and X-RateLimit-Remaining
- Response time across the small request sample
How to use it
- Enter an API endpoint.
- Choose between two and six requests.
- Run the test.
- Review 429 behavior and any rate-limit headers.
Important:
Not observing a 429 response in a few requests does not prove that an API lacks rate limiting. Many APIs use larger windows, user-specific quotas or gateway-level controls.
Frequently asked questions
Is this a stress test?
No. The tool intentionally caps the request count at six.
Why might no rate limit be detected?
The endpoint may have a larger quota, use another identity dimension, or omit rate-limit headers.