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REST API

Created by: Roy Fielding (UC Irvine dissertation) (2000)

Representational State Transfer: stateless web architectural style over HTTP.

#Protocol#HTTP#CRUD#Web API
CompareOfficial Docs

Technical Specifications & Execution Parameters

PARADIGMStateless Resource-Oriented Architecture

What is REST API?

Formulated by Roy Fielding in his 2000 doctoral dissertation, REST is an architectural style for distributed hypermedia systems. It relies on standard stateless HTTP methods (GET, POST, PUT, PATCH, DELETE), uniform resource identifiers (URIs), and standard status codes.

Common Real-World Use Cases

  • Public developer APIs (GitHub, Stripe, Twilio)
  • Standard client-server web and mobile backends
  • Microservices communication over HTTP/JSON

Core Architectural Features

Statelessness: every request carries complete context
Standard HTTP verbs mapping to CRUD semantics
Native HTTP caching headers (Cache-Control, ETag)
Decoupled client and server lifecycles

Syntactic & Architectural Examples

RESTful HTTP Resource
http
GET /api/v1/languages/javascript HTTP/1.1
Host: api.emme.edu
Accept: application/json

HTTP/1.1 200 OK
Content-Type: application/json
Cache-Control: max-age=3600

{ "id": "javascript", "name": "JavaScript", "version": "ES2024" }
Explanation: Shows HTTP resource negotiation and status codes.

Key Strengths

  • +Universal support in every browser and programming language
  • +Native integration with CDN edge caches and proxies
  • +Human-readable endpoints and JSON payloads

Limitations & Constraints

  • -Over-fetching unwanted payload fields
  • -N+1 network waterfall round-trips for nested resources
Research Standards & Sources
Last researched: 2026-09-04
Verified primary and official documentation sources:
Standards SpecificationArchitectural Styles and Network-based Software Architectures (Roy Fielding)

Interactive REST API Wire Simulation

Interactive Protocol EngineRESTful HTTP/1.1 & HTTP/2

REST API Request & Response Lifecycle

Safe & Idempotent: Retrieves the specified resource representation without modifying server state.

GEThttps://api.devatlas.io/api/v1/technologies/react
HTTP 200/201
Node A
Client / Browser
Initiates HTTP request with headers
Node B
API Gateway
Token auth, rate-limiting & routing
Node C
Application Server
Controller handles business logic
Node D
Database (PostgreSQL)
ACID transactional read / write
Step 1/7:1. Client Sends Request(Browser / Client)
Client Request WireGET /api/v1/technologies/react
Accept: application/json
Authorization: Bearer dev_sec_99a8
Database Operation:
SELECT * FROM technologies WHERE slug = 'react' LIMIT 1;
Server Response Wire
200 OK
content-type: application/json; charset=utf-8
x-ratelimit-remaining: 994
x-response-time: 14.8ms
JSON Body:
{
  "status": "success",
  "data": {
    "id": "react",
    "name": "React",
    "version": "19.0",
    "stars": "230k+",
    "cached": true
  }
}