RESTful API Design Best Practices

Good API design is crucial for developer experience and long-term maintainability.

Use HTTP Methods Correctly

GET    /users       - List users
GET    /users/:id   - Get user
POST   /users       - Create user
PUT    /users/:id   - Update user
DELETE /users/:id   - Delete user

Versioning

Version your API from the start:

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

Status Codes

Use appropriate HTTP status codes:

• 200: Success
• 201: Created
• 400: Bad Request
• 401: Unauthorized
• 404: Not Found
• 500: Server Error

Response Format

Consistent JSON responses:

{
  "data": { ... },
  "meta": {
    "page": 1,
    "total": 100
  },
  "errors": []
}

Pagination

Implement cursor-based pagination:

GET /users?cursor=abc123&limit=20

Filtering and Sorting

Allow flexible querying:

GET /users?role=admin&sort=-created_at

Authentication

Use tokens or OAuth:

Authorization: Bearer <token>

Rate Limiting

Protect your API:

X-RateLimit-Limit: 100
X-RateLimit-Remaining: 95

Conclusion

Well-designed APIs are a joy to use and maintain.