API Design first: Principles for Scalable Interfaces
API Design first: Principles for Scalable Interfaces Designing an API around a contract first helps teams avoid drift as products grow. When you and your partners agree on resources, methods, and data shapes up front, fewer surprises appear later. A contract becomes the single source of truth that guides implementation, testing, and documentation. Start with a clear contract. Define resources like books, authors, and orders, and establish stable data shapes. Use simple, predictable names and keep the same fields across endpoints whenever possible. A well written contract makes onboarding easier for new teams and external developers. ...