Learn API Testing with Postman Online: Free Course with AI Tutor & Certificate
This free postman api testing course offers an optional paid certificate and teaches you how to validate web services. Across 14 modules and 96 video lessons, you'll master HTTP fundamentals, REST APIs, and automation. In about 1 hour, you can build real projects like testing a global e-commerce platform.
What you'll learn in this API Testing with Postman course
Five concrete outcomes you'll walk away with, each mapped to modules in the curriculum below.
Perform comprehensive API testing using Postman, including creating, validating, and automating test cases.
Understand and implement various authentication and authorization methods such as OAuth, API Keys, and Basic Auth.
Write advanced JavaScript-based assertions and tests to validate API responses, headers, cookies, and performance metrics.
Conduct performance, load, and security testing for APIs, identifying bottlenecks and vulnerabilities.
Integrate API testing into CI/CD pipelines using tools like Newman and Jenkins for continuous monitoring and testing.
API Testing with Postman course syllabus
01 Section 1: Introduction to API Testing
- What is an API and why testing it matters
- Types of APIs (REST, SOAP, GraphQL)
- Introduction to API testing
- Benefits of API testing over UI testing
- Common API testing tools overview
- Basic HTTP methods explained
- Understanding API documentation
02 Section 2: HTTP Fundamentals
- Structure of an HTTP request and response
- Request methods (GET, POST, PUT, DELETE, etc.)
- HTTP status codes and their meanings
- HTTP headers and their uses
- Query parameters vs path parameters
- HTTP vs HTTPS
- Cookies and sessions basics
- Content types and accept headers
03 Section 3: Getting Started with Postman
- Installing and setting up Postman
- Creating your first API request
- Using collections in Postman
- Adding and managing environment variables
- Setting headers and parameters
- Writing basic tests in Postman
- Understanding response view in Postman
- Importing and exporting Postman collections
04 Section 4: Request and Response Handling
- Chaining requests using variables
- Parsing and validating API responses
- Setting up dynamic parameters
- Handling authentication tokens
- Debugging common response issues
05 Section 5: Authentication and Authorization
- Overview of auth types (Basic, OAuth, API Keys)
- Implementing Basic Auth in Postman
- Using OAuth 2.0 flow in Postman
- Handling Bearer Tokens
- API key setup and testing
- Managing token refresh workflows
- Role-based access control testing
06 Section 6: Writing Tests with Postman
- Using JavaScript for assertions Part 1
- Using JavaScript for assertions Part 2
- Common test cases in API testing
- Validating response time and status
- Checking headers and cookies
- Comparing expected vs actual response body
- Writing tests for array and nested objects
- Running tests on multiple requests
- Exporting test results
07 Section 7: Automating with Postman Collection Runner
- Introduction to the Collection Runner
- Postman Environments: How to Set Up and Use Them
- Data Driven Testing
- Exporting run results
- Debugging failed test cases
- Postman monitors for scheduling
- Best practices for automated runs
08 Section 8: Working with REST APIs
- Understanding REST constraints
- Performing CRUD operations
- REST endpoints
- Common headers and methods in REST
- Versioning REST APIs
- Pagination in API testing
- REST vs GraphQL overview
09 Section 9: SOAP API Testing
- Introduction to SOAP protocol
- Tools for SOAP API testing
- Writing requests with WSDL
- Parsing XML responses
- Validating SOAP responses in Postman
- Handling SOAP faults
10 Section 10: API Contract Testing
- What is API contract testing
- API schema validation
- Introduction to OpenAPI and Swagger
- Validating schemas using tools
- Setting up schema validation in Postman
11 Section 11: Mocking and Virtualization
- Why use mock servers in testing
- Creating mock APIs in Postman
- Simulating various HTTP codes
- Mocking APIs with examples in Postman
- Using delays and dynamic responses
- Mock servers vs stubs vs fakes
12 Section 12: Performance and Load Testing for APIs
- Understanding performance metrics
- Introduction to JMeter for APIs
- Creating basic performance tests
- Using Postman with Newman for load tests
- Interpreting response time and throughput
- Bottleneck identification techniques
13 Section 13: API Security Testing
- Common security threats in APIs
- Rate limiting and throttling checks
- Secure headers and CORS policies
- Testing data exposure and leakage
- Using tools like OWASP ZAP for APIs
- Mitigating common API vulnerabilities
14 Section 14: Continuous Integration and API Testing
- Integrating API tests with CI tools
- Setting up Newman with Jenkins
- Run Postman Collection in Postman CLI
- Generate HTML Reports in Newman
- Using version control with API tests
- CI best practices for API testing
- Monitoring APIs in production
- Creating reusable test frameworks
- Working with microservices APIs
Real-world projects you'll work on
Practice the exact kind of work API Testing with Postman professionals do on the job.
Comprehensive API Testing for a Global E-Commerce Platform
Automating REST API Validation for a FinTech Startup
Performance and Load Testing of APIs for a Social Media Giant
Security Assessment of APIs for a Cloud Service Provider
Skills you'll gain
Add these to your LinkedIn profile and resume the day you finish.
Who should take this API Testing with Postman course?
And exactly what you need before starting (spoiler: almost nothing).
This course is for
- Software testers in India looking to upgrade from manual testing to API automation.
- Beginner developers wanting to understand how to validate REST APIs.
- Quality assurance (QA) professionals aiming to learn Postman for continuous integration.
- Career switchers seeking a quick, practical entry into backend testing.
Prerequisites
- No prior API testing experience is required to start this course.
- Basic understanding of web applications and how the internet works is helpful.
- Familiarity with foundational programming concepts will make learning JavaScript assertions easier.
How learning works on LearnTube
The structure of a bootcamp, the price of free.
AI curates your path
Our AI picks the top 1% of video content for each topic and arranges it into a structured, goal-based curriculum. No more tutorial roulette.
Learn, then get quizzed
After every lesson, your AI tutor asks you a question and gives personalised feedback on your answer, so gaps get fixed immediately.
Finish with proof
Complete the course, build the capstone project, and claim a certificate recognised by 900+ hiring partners.
A complete API Testing with Postman course: free, structured and job-focused
This free API testing course gives you an optional paid certificate while teaching you how to test and automate web services. LearnTube pairs curated YouTube videos with an interactive AI tutor that quizzes you after every lesson to ensure you actually understand the material. Your learning starts right away with What is an API and why testing it matters, moving quickly into HTTP Fundamentals and Getting Started with Postman. You'll master Request and Response Handling, Authentication and Authorization, and Writing Tests with Postman.
Once you understand the basics, the curriculum shifts to advanced concepts like Automating with Postman Collection Runner, Working with REST APIs, and SOAP API Testing. You won't just watch videos. You will apply your new skills across four hands-on projects, including a Comprehensive API Testing for a Global E-Commerce Platform and Automating REST API Validation for a FinTech Startup. We also cover API Contract Testing, Mocking and Virtualization, and Performance and Load Testing for APIs to round out your technical toolkit.
The final sections cover API Security Testing and Continuous Integration and API Testing. By the end of this 1-hour program, you'll know how to write JavaScript-based assertions and integrate tests into CI/CD pipelines using Newman and Jenkins. Join over 60,000 learners on LearnTube to build practical skills. You can study entirely at your own pace, taking advantage of free learning with the option to upgrade for a verified certificate when you finish.
Jobs you can target after learning API Testing with Postman
API Testing with Postman is a gateway skill for some of the fastest-growing roles in tech.
You will write automated test scripts and validate software functionality before release.
You will focus specifically on verifying that backend services communicate correctly and securely.
You will build testing frameworks and integrate them into CI/CD pipelines.
Typical entry-level salary ranges in India as of August 2026. Actual compensation varies by city, company and experience.
Earn a API Testing with Postman certificate employers recognise
Finish the course and claim a certificate you can share anywhere.
- Learn 100% free: every lesson, quiz and the AI tutor cost nothing
- Claim your certificate when you complete the course (an optional paid add-on)
- Recognised by 900+ hiring partners across India
- One click to share on LinkedIn and add to your resume
Why learners choose LearnTube
Real reviews from Google. You learn free, you get assessed free, and you pay only if you want the certificate.
Though I have 11 years of experience as an HRBP, the course helped me refresh my knowledge and gave me insights into new trends in the market. The modules were clear and easy to understand, and the quizzes were well designed. I have added the certificate to my LinkedIn profile.
I had a lot of doubts while learning, but the AI chatbot answered them in detail with simple summaries. The videos on the platform saved me a lot of time as I didn't have to search YouTube and watch random content.
Just earned my certificate in HR Management from LearnTube.ai! The platform is user-friendly and the assessment was a great way to validate my knowledge. Feeling proud of this accomplishment!
I enrolled in a LearnTube personalized course to get into a Data Analytics role. It helped me learn SQL in depth and gave me hands-on experience with Power BI. I attached the LearnTube certificate to my CV, it added credibility to my profile, and I'm currently in the interview process.
The interface is user-friendly and intuitive, making it easy to navigate the course. I encountered no errors during my time using the platform, which was a refreshing change from other online learning platforms.
Just cleared the Business Analyst assessment and got certified! Loved how the course simplifies big concepts like data-driven decision making into short, practical lessons. The automated quizzes kept me on track the whole time. Perfect boost for my resume!
The certificate gave me a real edge during my B.Tech. By the time I graduated, I had skills that set me apart from my peers, and the certification opened up more job opportunities. It gave me the confidence to stand out during interviews.
I manage many software projects as a General Manager and was looking for a good certification program to stay competitive. After researching many programs, I chose LearnTube and it was much better than I expected. The material is well-organized and practical, and what I liked most is the lifetime access.
Frequently asked questions
Everything learners ask before starting this API Testing with Postman course.
What job roles does this API testing training lead to?
You can pursue roles like QA Automation Engineer, API Tester, or SDET. These entry-level positions in India typically offer starting salaries between ₹4.0 LPA and ₹7.5 LPA, depending on your prior experience and technical background.
Can I complete this postman api testing course on my phone?
Yes. LearnTube is fully optimized for mobile devices. You can watch the curated video lessons, take the AI-tutor quizzes, and review course materials from anywhere, entirely at your own pace.
How long does it take to learn Postman automation testing?
This course takes about 1 hour to complete. It features 14 modules and 96 short video lessons, making it easy to finish in a single afternoon or spread out over a few days.
What will I build during this free api testing course?
You will complete four practical projects. These include comprehensive API testing for a global e-commerce platform, automating REST API validation for a FinTech startup, and running performance tests for a social media giant.
Is the certificate for this postman course free?
No. The learning materials, videos, and AI quizzes are completely free to access. The verified certificate is an optional paid add-on you can purchase once you finish all 14 modules.
Do I need to know how to code before starting?
You don't need advanced coding skills, but basic programming knowledge helps. The course teaches you how to write simple JavaScript-based assertions to validate API responses, headers, and cookies effectively.
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