Rate Limiting

Add rate limiting to protect against abuse:

1. Identify critical endpoints that need protection
2. Implement rate limiting middleware
3. Configure appropriate limits based on endpoint type
4. Add request throttling for expensive operations
5. Implement IP-based blocking for repeat offenders
6. Add monitoring for rate limit violations

Success Criteria

• Rate limiting implemented on all critical endpoints
• Appropriate limits set per endpoint type
• Rate limit headers returned (X-RateLimit-*)
• Monitoring and alerting configured
• IP blocking mechanism functional

Completion Checklist

• Test rate limits with load testing tools
• Create tests for rate limiting behavior
• Document rate limit policies for API users
• Configure logging for rate limit violations
• Test IP blocking and unblocking mechanisms