API Testing
Test REST APIs end to end: HTTP, Postman, auth, schema and contract checks, automation in TypeScript and CI. A complete, hands-on path from your first test to a production-grade framework.
- 123
- Lessons
- 12
- Sections
- 12
- Practice labs
- ~35h
- Of content
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1import { test, expect } from '@playwright/test';23test('POST /orders creates an order', async ({ request }) => {4 const res = await request.post('/orders', { data: { productId: 42, qty: 2 } });5 expect(res.status()).toBe(201);6 const order = await res.json();7 expect(order).toMatchObject({ status: 'pending', qty: 2 });8});
The method
Built like real QA work, not a video playlist.
Learn
123 focused lessons, each a few minutes long.
Practice
12 hands-on labs in a browser workspace.
Test yourself
12 section assessments plus a final exam.
Prove it
A public, verifiable achievement for recruiters.
What you will learn
- API Testing Foundations: What is an API?, Why QA Engineers Test APIs, Client, Server and the Request-Response Cycle
- HTTP Essentials: Anatomy of an HTTP Request, Anatomy of an HTTP Response, HTTP Methods: GET, POST, PUT, PATCH, DELETE
- JSON and Data Formats: JSON Syntax and Data Types, Nested Objects and Arrays, Reading Large JSON Responses
- Postman for API Testing: Installing Postman and the Workspace Tour, Sending Your First Request, Collections and Folders
- API Test Design: Deriving Tests from Requirements, Positive and Negative Testing, Boundary Value Analysis for APIs
- Authentication and Authorization: Authentication vs Authorization, API Keys, Basic Authentication
Where you will be at the end
- Complete 12 hands-on practice challenges, one per section (from API Testing Foundations to API Framework and CI/CD)
- Pass 12 section assessments
- Pass the 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 understanding of how websites work; Manual Testing fundamentals
Curriculum
13 sections, one clear path.
- What is an API?
- Knowledge check
- Why QA Engineers Test APIs
- Knowledge check
- Client, Server and the Request-Response Cycle
- Knowledge check
- REST vs SOAP vs GraphQL
- Knowledge check
- Where API Tests Fit in the Test Pyramid
- Knowledge check
- API Documentation and OpenAPI/Swagger
- Knowledge check
- Reading an API Contract
- Knowledge check
- Types of API Testing
- Knowledge check
- Your First API Call with the Browser and curl
- Knowledge check
- The API Testing Mindset
- Knowledge check
- Making Your First API Calls and Understanding Responses
- 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 get | Free | Academy |
|---|---|---|
| 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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API Testing: common questions
1.Do I need experience before starting API Testing?
2.What can I try for free, and what needs payment?
3.How long does the course take?
4.What do I get when I finish?
API Testing: limits and where to go next
Good to know
- Automation in this course uses TypeScript; for Java automation see the REST Assured course
- Each section assessment unlocks after you finish that section's lessons and practice
Related resources
- API Playground send real practice requests
- API testing interview questions
- API testing notes (PDF)
- REST Assured course
Your next step
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.
About this API Testing course
This API testing course takes you from what an API is to a working automated API test framework running in CI. It has 12 sections and 123 lessons, about 35 hours of study, with a practice lab and an assessment in every section.
You learn HTTP and JSON properly first, then test APIs by hand in Postman, design positive and negative test cases, handle authentication and authorization, and automate checks with TypeScript. Later sections cover schema and contract testing, test data and state, advanced scenarios, basic performance and security checks, and building a framework that runs in CI/CD. Labs call a real practice API, so every request you send returns a real response.
Who this course is for
- Manual testers who want to start API testing
- UI automation testers adding API skills
- Freshers preparing for API testing interview questions
- Developers who want a structured way to test their own APIs
What you need
- Basic computer skills; no coding needed for the first sections
- Postman installed (free) for the manual testing sections
- Node.js for the TypeScript automation sections, set up in the course
What you will be able to do
- Read and write HTTP requests, status codes, headers and JSON
- Design API test cases, including negative and boundary cases
- Test token-based login and role-based access
- Automate API checks with TypeScript and validate response schemas
- Manage test data so tests do not depend on each other
- Run your API test suite in a CI/CD pipeline