https://apihub.ai-term-hub.com/tags/rate-limiting/Recent content in Rate-Limiting on APIHub - Global API DirectoryHugoenThu, 23 Jul 2026 00:00:00 +0000https://apihub.ai-term-hub.com/guides/rate-limiting/Thu, 23 Jul 2026 00:00:00 +0000https://apihub.ai-term-hub.com/guides/rate-limiting/<h1 id="rate-limiting">Rate Limiting</h1> <p>Rate limiting caps how many requests a client can make in a given time window. Limits protect the API from abuse and ensure fair shared capacity. Exceeding a limit returns HTTP <code>429 Too Many Requests</code>.</p> <h2 id="common-limit-styles">Common Limit Styles</h2> <ul> <li><strong>Fixed window</strong> - N requests per calendar minute/hour.</li> <li><strong>Sliding window</strong> - N requests in any rolling period.</li> <li><strong>Token bucket</strong> - bursts allowed up to a bucket size, refilled at a steady rate.</li> <li><strong>Concurrency</strong> - maximum simultaneous in-flight requests.</li> </ul> <h2 id="response-headers">Response Headers</h2> <p>Well-behaved APIs expose headers such as <code>X-RateLimit-Limit</code>, <code>X-RateLimit-Remaining</code>, <code>X-RateLimit-Reset</code>, and <code>Retry-After</code>. Read these on every response to adjust your throughput dynamically.</p>