Building well-designed APIs is crucial for creating maintainable and scalable applications.
RESTful Principles#
Use Nouns for Resources#
✅ GET /users
✅ GET /users/123
❌ GET /getUsers
❌ GET /getUserById
HTTP Methods#
| Method | Purpose |
|---|---|
| GET | Retrieve resources |
| POST | Create new resources |
| PUT | Update entire resource |
| PATCH | Partial update |
| DELETE | Remove resources |
Response Format#
Always return consistent JSON responses:
{
"data": {
"id": 1,
"name": "John Doe",
"email": "john@example.com"
},
"meta": {
"timestamp": "2024-02-15T10:30:00Z"
}
}
Error Handling#
Provide meaningful error messages:
{
"error": {
"code": "VALIDATION_ERROR",
"message": "Email format is invalid",
"field": "email"
}
}
Pagination#
For list endpoints, always implement pagination:
GET /users?page=2&limit=20
Response should include:
{
"data": [...],
"pagination": {
"page": 2,
"limit": 20,
"total": 100,
"totalPages": 5
}
}
Versioning#
Version your API from the start:
/api/v1/users
/api/v2/users
Rate Limiting#
Implement and communicate rate limits via headers:
X-RateLimit-Limit: 100
X-RateLimit-Remaining: 95
X-RateLimit-Reset: 1707994800
A well-designed API is a joy to work with and reduces integration friction significantly.