AWS API Gateway Rate Limiting and Throttling

AWS API Gateway Rate Limiting and Throttling

Rate limiting and throttling in AWS API Gateway help protect services from traffic spikes, abuse, and accidental overload. With usage plans and quotas, teams can enforce fair consumption and predictable performance.

Control Types in API Gateway

  • Account-level throttling limits
  • Stage and method-level throttling settings
  • Usage plans and API keys for consumer-specific controls
  • Request validation to reject malformed traffic early

Design Principles

  • Set limits based on backend capacity, not optimistic assumptions
  • Differentiate internal and external consumers
  • Use gradual rollout when tightening limits

Operational Guidance

  • Monitor 4xx/5xx rates and throttled requests
  • Communicate quota and retry expectations to clients
  • Implement exponential backoff in SDKs and integrations

Common Pitfalls

  • One-size-fits-all throttling for all consumers
  • Missing usage plans for multi-tenant APIs
  • No circuit breaker behavior downstream

Final Thoughts

Well-designed API Gateway throttling protects reliability while preserving fair access. Treat limit policy as part of your API contract.