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HTTP Basics

Beginner-friendly HTTP concepts, message structure, and protocol mental models.

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HTTP Methods
HTTP GET Method: Complete Guide with Examples
Learn how the HTTP GET method works. Understand when to use GET requests, query parameters, caching, and best practices with real-world examples.
HTTP Methods
HTTP POST Method: Complete Guide with Examples
Learn how the HTTP POST method works. Understand when to use POST requests, request bodies, form submissions, and API calls with practical examples.
HTTP Status Codes
201 Created
Resource successfully created. Learn when to use 201 Created, proper response format, and best practices for creation endpoints.
HTTP Status Codes
HTTP 200 OK: What It Means and When to Use It
200 OK means the request succeeded and the response carries the result. What a 200 should contain, and when 201, 204 or 206 is the better answer for your API.
HTTP Status Codes
HTTP 404 Not Found: What It Means and How to Fix It
404 Not Found means no resource exists at that URL. Find which layer sent it, then fix routing, deploys, rewrites, CDN cache and soft 404s, with curl checks.
HTTP Headers
Content-Type Header: Values, Examples, charset
Content-Type tells the receiver what the body is: application/json, text/html; charset=utf-8, multipart/form-data. Common values, examples and 415 fixes.
Guides
What Is HTTP? How the HTTP Protocol Works
HTTP is the request-response protocol behind every web page and API. See a real request and response, then methods, headers, status codes and what HTTPS adds.

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