RESTful API · Define REST API · Creating a REST API

RESTful API

Complete guide to RESTful API: define REST API, creating a REST API, REST API service, API creation, API implementation, building RESTful APIs, REST API structure, and interactive API tester.

Define REST API — What is RESTful API?

A RESTful API (Representational State Transfer API) is an architectural style for creating a REST API that allows different systems to communicate over HTTP. Define REST API: it uses standard HTTP methods and a stateless, client-server architecture. A rest based api is the foundation of modern web services. REST API technology powers everything from social media to payment gateways.

Stateless

Each request has all needed info — core REST API service principle

Client-Server

Separation of concerns — programming rest api best practice

Cacheable

Responses can be cached — restful web api performance

Uniform Interface

Standard REST API structure and endpoints

Layered

REST API application uses layered architecture

Code on Demand

Optional: REST api web api can return executable code

Resource-Based

REST API design example uses nouns for resources

HTTP Methods

GET POST PUT DELETE — rest api operations

REST API Operations — HTTP Methods (rest api operations)

Method	Purpose	REST API Design Example	Idempotent
GET	Retrieve resource (rest api coding)	GET /api/users	✓ Yes
POST	Create resource (api creation)	POST /api/users	✗ No
PUT	Update full resource (api implementation)	PUT /api/users/1	✓ Yes
PATCH	Partial update	PATCH /api/users/1	✗ No
DELETE	Remove resource (rest api operations)	DELETE /api/users/1	✓ Yes
HEAD	Headers only (restful api software)	HEAD /api/users	✓ Yes
OPTIONS	Allowed methods (website rest api)	OPTIONS /api/users	✓ Yes

REST API Tester — Creating a REST API Request (rest api application)

Method:

URL (rest api web api endpoint):

Request Body (for POST/PUT — rest api coding):

Response:

REST API Structure & REST API Design Example

A REST API structure uses resource-based URLs and standard HTTP methods. Here is a complete rest api design example for a Users rest api service:

Method	Endpoint	Action	Status Code
GET	/api/v1/users	List all users	200 OK
POST	/api/v1/users	Create user	201 Created
GET	/api/v1/users/{id}	Get user by ID	200 OK / 404
PUT	/api/v1/users/{id}	Replace user	200 OK
PATCH	/api/v1/users/{id}	Update user fields	200 OK
DELETE	/api/v1/users/{id}	Delete user	204 No Content
GET	/api/v1/users/{id}/posts	User posts (nested)	200 OK

FAQ — RESTful API

Define REST API — what does RESTful API mean?

Define REST API: REST (Representational State Transfer) is an architectural style. A RESTful API follows REST constraints: stateless, cacheable, uniform interface. Rest api web api vs SOAP: REST uses JSON/HTTP, SOAP uses XML/WSDL. REST API is the standard for restful web api and rest api application development.

Creating a REST API — building RESTful APIs (building restful apis)?

Creating a REST API involves: 1) Choose language (Node.js, Python, PHP), 2) Define rest api structure, 3) Set up HTTP routes for rest api operations, 4) Implement api implementation logic, 5) Test with tools. Building RESTful APIs = programming rest api with frameworks like Express, FastAPI, or Laravel.

REST API technology — restful API software (restful api software)?

REST API technology uses HTTP/HTTPS as transport. Popular restful api software for testing: Postman, Insomnia, our tool above. Common rest api coding frameworks: Express.js (Node), FastAPI (Python), Laravel (PHP), Spring Boot (Java). Website rest api enables front-end/back-end separation.