API Patterns

REST and GraphQL API design patterns for consistent, versioned, and well-tested interfaces.

API Versioning

URL-Based Versioning

// routes/v1/markets.ts
// routes/v2/markets.ts
// URL: /api/v1/markets, /api/v2/markets

// Express router setup
import { Router } from 'express'

const v1Router = Router()
const v2Router = Router()