api-gateway-and-service-integration

To implement identity propagation in an API gateway, define explicit gateway responsibilities and contract boundaries to enforce authentication policies without leaking internal models to external partner APIs.

The best way to design a BFF without leaking internal business rules is to apply an anti-corruption layer that shapes the client experience while maintaining strict contract enforcement and routing boundaries.

Configure rate limiting and timeout budgets for partner API integrations by establishing standardized resilience policies that manage retries and error mapping to ensure reliable service-to-service calls.

An anti-corruption layer handles API transformation by isolating external dependencies, ensuring that observability and versioning requirements are met through explicit design decisions and testing expectations.

Yes, you can use this API gateway pattern to manage routing, versioning, and contract enforcement for service-to-service calls, ensuring reliability through explicit design decisions and testing expectations.

You should avoid using a BFF pattern when strict contract enforcement and anti-corruption boundaries are unnecessary, as direct service-to-service calls may suffice without added gateway routing and transformation overhead.