Prompt

Design an API gateway for my distributed system.

<backend_services>
{list all backend services and their APIs}
</backend_services>

<client_requirements>
- Client types: {web/mobile/third-party}
- Authentication: {methods needed}
- Rate limiting: {requirements}
</client_requirements>

<gateway_features>
{routing/auth/rate-limiting/caching/etc}
</gateway_features>

Design gateway that handles:
1. Request routing and load balancing
2. Authentication and authorization
3. Rate limiting and throttling
4. Request/response transformation
5. Caching strategies
6. Circuit breaking and retries

Include deployment and scaling approach.