Why use Rate Limit Tester?
Rate limits protect APIs but are hard to observe without controlled traffic. This tool issues bursts and sustained patterns so you can see when 429s appear, whether Retry-After headers are trustworthy, and how your client should backoff.
Practical tips
- Start with small concurrency; respect provider terms of service.
- Log response bodies on 429—some APIs embed quota metadata in JSON.
- Pair with Retry Logic Helper to pick sane client-side delays.
Common questions
- Will this get my IP banned?
- Aggressive testing can. Use staging keys and low volumes first.
- Does this replace server-side metrics?
- No. It complements them with a browser-side view your users might experience.