What is API gateway rate limiting?

Rejection rate: Percentage of requests returning 429. A sustained rate above 5% often indicates the limit is too low or a client is misbehaving.
Rejection count by key: Identifies which API keys, IPs, or users are most frequently throttled.
Quota utilization: How close consumers are to their limits. Proactively notify consumers approaching 80% of their quota.
Latency impact: Rate limit checks should add sub-millisecond overhead. Monitor P99 latency of the rate limit middleware.
Redis operation latency: For distributed rate limiting, Redis round-trip time directly impacts gateway latency.

Configuring API Gateway Rate Limiting and Throttling is a common topic when working with HTTP and APIs. Understanding it helps you diagnose issues and choose the right status codes and headers. Use our Header Inspector and AI Inspector to analyze your requests and responses.

How can I debug API gateway rate limiting?

Use the Header Inspector to inspect request and response headers, the Status Analyzer to send live requests, and the AI Inspector to get recommendations. Check the Knowledge Center for more guides.

Which tools on HttpStatus.com help with API gateway rate limiting?

Header Inspector, Redirect Checker, AI Inspector, and the API Client are useful. Visit the relevant hub (e.g. CORS Hub, Redirect Hub) for more tools and references.

Where can I learn more about HTTP status codes?

Visit the Status codes reference and the HTTP Hub on HttpStatus.com for full documentation and interactive tools.

Configuring API Gateway Rate Limiting and Throttling