Prompt

Design comprehensive rate limiting system.

<api_endpoints>
{list endpoints and expected traffic}
</api_endpoints>

<user_tiers>
{different user types and limits}
</user_tiers>

<infrastructure>
{available infrastructure components}
</infrastructure>

Design:
1. Algorithm selection (token bucket/etc)
2. Distributed rate limiting
3. User identification strategy
4. Limit configuration
5. Graceful degradation
6. Monitoring and alerts