A Good API Is Like a Good Conversation
REST API is a contract between your backend and clients. If the contract is unclear — integration becomes a nightmare.
Resources, Not Actions
URLs should describe resources, not actions. Use nouns, not verbs. The HTTP method already describes the action.
Pagination: Always and With Metadata
Never return all records. Return paginated results with metadata: current_page, per_page, total, last_page.
Consistent Error Responses
Every error should return in the same format with proper HTTP status codes: 400, 422, 401/403, 500.
API Versioning
V1 continues to work, v2 introduces breaking changes. This way you do not break existing clients.
Filtering and Rate Limiting
APIs should support flexible queries through query parameters and inform clients about limits through headers.
Conclusion
A good API is designed with the consumer in mind. Consistency, predictability, and backward compatibility are investments.