Building REST APIs That Developers Actually Love Using

What Makes a Great API?

I've consumed hundreds of APIs and built dozens. The difference between a good API and a bad one is the same as the difference between a clear road sign and a confusing maze.

The Golden Rules

1. Use Nouns, Not Verbs

✅ GET /users/123
❌ GET /getUser?id=123

2. Plural Resource Names

✅ GET /products
❌ GET /product

3. Consistent Response Structure

Every response should follow the same format:

{
  "success": true,
  "data": { ... },
  "meta": { "page": 1, "total": 50 }
}

HTTP Status Codes That Matter

Pagination Done Right

Always paginate list endpoints. Nobody wants to load 10,000 records:

GET /products?page=2&limit=20&sort=created_at&order=desc

Versioning Your API

Start with versioning from day one:

/api/v1/users
/api/v2/users

Error Messages That Help

Bad: { "error": "Invalid request" }

Good: { "error": "Validation failed", "details": [{ "field": "email", "message": "Must be a valid email address" }] }

A well-designed API is like a well-written book - it guides you naturally from start to finish.