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Backend2026-05-17

REST API

Also known as: REST API / RESTful API / REST

A web service communication style based on HTTP standards. It uses resource-oriented URLs, HTTP method semantics, and stateless communication, remaining the most widely adopted convention for web APIs.


Overview

REST APIs map CRUD operations to HTTP methods (GET, POST, PUT, DELETE) and return JSON responses. Virtually every backend framework — Express, FastAPI, Rails — provides first-class support for building REST endpoints.

OpenAPI Integration

Documenting REST APIs with the OpenAPI specification is best practice. FastAPI generates OpenAPI docs automatically. See Hono implementation guide (OpenAPI) for practical examples.

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