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Postman API Testing

API testing with Postman from zero: HTTP basics, collections, variables and environments, auth and request chaining, test scripts and schema checks, data-driven runs, Newman and GitHub Actions, roles, ownership and business-rule checks, and a full practice-shop API suite as your final project. A complete, hands-on path from your first test to a production-grade framework.

40
Lessons
8
Sections
8
Practice labs
~18h
Of content
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checkout.spec.ts
1import { test, expect } from '@playwright/test';
2
3test('checkout applies coupon', async ({ page }) => {
4  await page.goto('/cart');
5  await page.getByLabel('Coupon').fill('QA20');
6  await page.getByRole('button', { name: 'Apply' }).click();
7  await expect(page.getByTestId('total')).toHaveText('$80.00');
8});
1 passedchromium · 1.2s

The method

Built like real QA work, not a video playlist.

Learn

40 focused lessons, each a few minutes long.

Practice

8 hands-on labs in a browser workspace.

Test yourself

8 section assessments plus a final exam.

Prove it

A public, verifiable achievement for recruiters.

What you will learn

  • API and Postman Foundations: What API Testing Is and Where Postman Fits, HTTP Basics: Methods, URLs, Status Codes and Headers, Postman Tour: Workspaces, Requests and the Response Pane
  • Variables, Environments, Auth and Chaining: Variables and Their Scopes, Environments: One Collection, Many Servers, Authorization: Bearer Tokens and Inheritance
  • Test Scripts, Contracts and Negative Tests: Writing Tests with pm.test and pm.expect, Checking Bodies, Headers and Error Messages, JSON Schema Checks for Whole Replies
  • Collection Runner and Data-Driven Testing: The Collection Runner: Running a Whole Suite, Data-Driven Runs with CSV and JSON Files, Controlling Flow: Order, Skips and setNextRequest
  • Newman, Reports and CI Pipelines: Newman: Running Collections from the Command Line, Reporters: CLI, JUnit and HTML Reports, Running Newman in GitHub Actions
  • Mocks, Contracts, Monitors and Team Workflow: Saved Examples and Mock Servers, Contract-First Testing with an API Definition, Monitors: Scheduled Health Checks

Where you will be at the end

  • Complete 8 hands-on practice challenges, one per section (from API and Postman Foundations to Final Project: A Complete Demo Shop Suite)
  • Pass 8 section assessments
  • Build the portfolio project: Project 1
  • Pass the Postman API Testing final assessment and add the result to your Skill Passport

Who this course is for

  • Beginners and manual testers starting this skill from scratch
  • Working testers who want to apply it on real projects
  • Experienced QA engineers and SDETs going deeper for senior roles
  • Anyone preparing for QA interviews that ask about this skill
  • Best if you already have: Basic manual testing knowledge; No coding experience needed; the small JavaScript used in Postman tests is taught step by step

Curriculum

9 sections, one clear path.

LessonPracticeKnowledge checkProjectAssessment
    • What API Testing Is and Where Postman Fits
    • Knowledge check
    • HTTP Basics: Methods, URLs, Status Codes and Headers
    • Knowledge check
    • Postman Tour: Workspaces, Requests and the Response Pane
    • Knowledge check
    • Query Parameters, Headers and JSON Bodies
    • Knowledge check
    • Collections, Folders and Request Documentation
    • Knowledge check
    • Lab: First Checks on the Demo Shop Products API
    • Section assessment

Members-only toolkit

Take the course with you

Made from this course's own lessons, quizzes and labs — ready to revise before interviews or use at work.

Course cheat sheet

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Interview Q&A pack

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Lab solutions & hints

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  • Auto-checked labs
  • Capstone portfolio project
  • Timed final exam

Why paid courses

More than a free course: practice, proof and a portfolio

What you getFreeAcademy
Short lessons with examples
Quick checks and certificate
Hands-on labs checked automatically
Section tests and a timed final exam
Portfolio capstone project with milestones
Cheat sheet, interview pack and lab answers to download
Verified skills on your profile and Skill Passport

What Students Are Saying

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Postman API Testing: common questions

1.Do I need experience before starting Postman API Testing?
Basic manual testing knowledge. No coding experience needed; the small JavaScript used in Postman tests is taught step by step.
2.What can I try for free, and what needs payment?
5 preview lessons are open to everyone. Full access to every lesson, lab and assessment is a one-time payment. The current price, and any offer that is still running, is shown in the access panel on this page and confirmed again at checkout.
3.How long does the course take?
About 18 hours of lessons and labs, fully self-paced. Your progress is saved automatically so you can stop and continue any time.
4.What do I get when I finish?
Passing the final assessment gives you a verifiable achievement page you can share, and the result is added to your Skill Passport.

Finish with proof, not just a certificate PDF.

Pass the final assessment and get a public verification page showing your score, completion date and the skills you demonstrated — ready to share on LinkedIn.

Course guide

About this Postman API testing course

This Postman API testing course teaches you how to test REST APIs with Postman from your first request to a complete, automated collection. It has 8 sections and 40 lessons, about 16 hours of study, with a hands-on lab and an assessment in every section and a final project on a practice Demo Shop API.

You start with API and Postman basics, then use variables, environments, authentication and request chaining. Next you write test scripts, contract and negative tests, run collections with data files, and run them from the command line with Newman, reports and CI pipelines. Later sections cover mock servers, monitors and team workflow, then roles, ownership, end-to-end order flows and basic security checks.

Who this course is for

  • Manual testers learning API testing for the first time
  • Freshers preparing for QA roles that ask for Postman
  • Testers who use Postman but have never automated it
  • Anyone preparing for Postman interview questions

What you need

  • Basic idea of how websites talk to servers; no coding needed to start
  • A laptop with the free Postman app
  • A little JavaScript helps for test scripts and is taught as you go

What you will be able to do

  • Send and inspect REST requests: methods, status codes, headers and JSON
  • Use variables, environments, tokens and chained requests
  • Write Postman test scripts, schema checks and negative tests
  • Run data-driven collections in the Collection Runner
  • Automate collections with Newman, HTML reports and CI
  • Test roles, ownership and end-to-end API flows

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