Rate Limiting & Abuse Protection Protect APIs from abuse with intelligent rate limiting. Rate Limit Strategies Fixed Window : 100 requests per hour Sliding Window : More accurate, prevents bursts Token Bucket : Allow bursts up to limit Leaky Bucket : Smooth request rate Implementation (Express) Redis-based Rate Limiting Per-User Rate Limiting IP-based Protection Response Headers Best Practices - Different limits for different endpoints - Lower limits for expensive operations - Skip rate limit for internal services - Return helpful error messages - Log rate limit violations - Monitor for abuse…