HTTP Methods Complete Guide

Published by SoftwareTestPilot

PDF • 20 pages • Notes • All Levels • API Testing

Published 8 September 2026 • Updated 5 October 2026

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This guide provides a practical handbook for understanding and testing HTTP methods in REST APIs.

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Overview

This guide provides a practical handbook for understanding and testing HTTP methods in REST APIs. It clearly defines GET, POST, PUT, PATCH, and DELETE, explaining their purpose, safety, idempotence, and cacheability, along with expected status codes for each. The PDF is designed for QA, SDET, and API testers. It covers test design, including positive, negative, and lifecycle tests, as well as security aspects like method tampering and access control. Testers will find detailed test cases for each HTTP method and guidance on troubleshooting.

What you'll learn

Understand HTTP method meanings
Distinguish safe and idempotent methods
Identify expected status codes
Design positive and negative API tests
Test API security considerations
Troubleshoot common API issues
Apply methods in Postman, cURL, REST Assured

Topics covered

http
rest-api

HTTP Methods at a Glance
GET: Retrieve Data
POST: Create and Trigger Actions
PUT: Replace a Resource
PATCH: Partial Update
DELETE: Remove a Resource
Choosing the Right Method
Status Codes by Method
Lifecycle Testing and Automation
Security Testing
Hands-On: Postman, cURL and REST Assured
Troubleshooting Guide
Master Testing Checklist
Interview Questions and Answers
Glossary and Cheat Sheet

Preview from this resource

E- COMMON RESPONSE CODES

1 200 204 201 [ 0K No Content Created L Resource updated. Resource updated. Resource created. - Response may include No response body returned. Sometimes used if the resource I the updated representation. did not exist previously. -

A short extract taken from the first 6 of 20 pages. The complete notes are in the QA Vault.

Skills covered

API Testing

Who this resource is for

API Tester

Format and what you get

A downloadable PDF you can read on phone or laptop.
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