Rate Limiter

A rate limiter is a tool that controls the rate of requests or operations performed by a user, service, or API within a specific time window.

Common Use Cases

1. API Protection: Prevent abuse and DoS attacks
2. Resource Management: Ensure fair usage of system resources
3. Cost Control: Limit usage to stay within service quotas
4. Service Stability: Prevent system overload

Common Algorithms

1. Fixed Window
2. Sliding Window
3. Token Bucket

Configuration Parameters

• Rate limit should be configurable
• Different rate limits for different users/plan/endpoints