API Design Patterns Design robust, scalable APIs using proven patterns for REST, GraphQL, and gRPC with proper versioning, authentication, and error handling. Quick Reference API Style Selection : - REST: Resource-based CRUD, simple clients, HTTP-native caching - GraphQL: Client-driven queries, complex data graphs, real-time subscriptions - gRPC: High-performance RPC, microservices, strong typing, streaming Critical Patterns : - Versioning: URI ( ), header ( ), content negotiation - Pagination: Offset (simple), cursor (stable), keyset (performant) - Auth: OAuth2 (delegated), JWT (stateless),…