REST API Design - Complete Guide

The Core Idea

REST (Representational State Transfer) is an architectural style for designing web services. A well-designed REST API provides ease of use, scalability, and maintainability.

GET: Used to retrieve resources from the server.

PUT: Full Resource Update

PATCH: Used to partially update a resource.

DELETE: Used to delete a resource.

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201 Created: Resource Created

400 Bad Request: Indicates an invalid request was sent to the server.

401 Unauthorized: Requires authentication before accessing the resource.

Frequently asked questions

What is a 500 Internal Server Error?

A 500 Internal Server Error indicates that something went wrong on the server side, preventing it from fulfilling the request.

Should I use plural names for resource URLs?

Yes, it’s generally recommended to use plural names for resource URLs in REST APIs. This aligns with the concept of resources being represented as collections.

Should I version my API (e.g., /api/v1/, /api/v2/)?

Yes, it's crucial to version your API when making breaking changes. This allows clients to continue using older versions while you introduce new features.

Should I use the appropriate HTTP methods?

Using the correct HTTP methods (GET, POST, PUT, DELETE, PATCH) is fundamental to RESTful API design and ensures semantic clarity.

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Everything above runs in your browser — open Hash Function Avalanche Visualizer and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

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