Backend API

RESTful API design uses resource-based URLs, proper HTTP methods (GET, POST, PUT, DELETE), and standardized status codes to create consistent, maintainable endpoints. Apply resource naming conventions, map CRUD operations to HTTP verbs, and return appropriate status codes for each response to ensure your API adheres to REST principles.

Use GET for retrieving data, POST for creating resources, PUT or PATCH for updates, and DELETE for removal. Return 200 for success, 201 for resource creation, 400 for bad requests, 404 for not found, and 500 for server errors. Consistent status code usage helps clients handle responses predictably.

Pagination uses limit and offset query parameters to return data in chunks. Filtering lets clients narrow results by resource attributes through query parameters. Sorting orders results by specified fields. All three use standardized query parameters in your endpoint URLs to provide flexible data retrieval without changing the API structure.

Nested resources follow hierarchical URL patterns like `/api/v1/users/{userId}/posts` to represent relationships. API versioning through URL paths (v1, v2) or headers lets you introduce breaking changes while maintaining backward compatibility. Both patterns keep your API organized and scalable as requirements evolve.

Rate limiting restricts request frequency per client using headers or tokens to prevent abuse and ensure fair resource usage. Track requests by IP, API key, or user ID and return 429 (Too Many Requests) status when limits are exceeded. This protects your backend from overload and maintains API availability.

Yes, standardized request and response formats reduce client complexity and prevent integration errors. Use consistent JSON structures, naming conventions, error response layouts, and documentation across all endpoints. This makes your API predictable, easier to maintain, and simpler for developers to consume.