implementing-api-rate-limiting-and-throttling
Implementing API Rate Limiting and Throttling
When to Use
- Protecting authentication endpoints against brute force and credential stuffing attacks
- Preventing API abuse and resource exhaustion from automated scripts and bots
- Implementing fair usage quotas for different API consumer tiers (free, premium, enterprise)
- Defending against denial-of-service attacks at the application layer
- Meeting compliance requirements that mandate API abuse prevention controls
Do not use rate limiting as the sole defense against attacks. Combine with authentication, authorization, and WAF rules.
Prerequisites
- Redis 6.0+ for distributed rate limit counters (or in-memory for single-instance deployments)
- API framework (Express.js, FastAPI, Spring Boot, or Django REST Framework)
- Monitoring system for rate limit metrics (Prometheus, CloudWatch, Datadog)
- Understanding of the API's normal traffic patterns and peak usage
- Load testing tool (k6, Gatling, or Locust) for validating rate limit behavior
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