Backends for Frontends. An alternative to making "one API to rule them all". Far less time spent trying to model an API in an abstract way that makes sense to many consumers.

Instead, an API and the endpoints are designed for a specific client. (e.g. A Mobile App or SPA) For us, this also meant a more RPC based API where and reusability is managed after the network hop.

https://samnewman.io/patterns/architectural/bff/

Backend for frontend! Specialized microservices that serve some frontend-consumable APIs e.g. when other internal APIs are too cumbersome to use or change too frequently.

Backend for frontend