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UdemyBestseller on UdemySoftware TestingPaid courseAll LevelsCertificate

Postman: The Complete Guide - REST API Testing (Udemy.com)

Postman API testing for manual and automated tests. Automate with Newman, GitLab, Jenkins or any other CI tool.

4.6
23,675 reviews

Created by: Valentin Despa

Last updated September 2026

Our take

Based on the ratings of 23,675 students, a sample of their written reviews and the syllabus, as the course stood in September 2026. No course pays to be reviewed.

Valentin Despa's Postman course runs about 19 hours across 254 lectures and 19 sections. It starts with building requests (GET, POST, PUT, PATCH, DELETE), moves into JavaScript and writing tests, then covers variables, environments and automation with Postman CLI, Newman and Jenkins. It is aimed at testing engineers and developers, and the requirements list is meant seriously: basic JavaScript, HTTP and REST knowledge, and some Node experience for the automation part. More than 139,000 students have enrolled.

Reviewers praise the clear, step-by-step teaching. One calls the instructor a talented, friendly teacher, and others like the quizzes and practice sections. The complaints are consistent, though. The later sections, especially collections and mock servers, are described as outdated, and the syllabus itself marks the mock server section as deprecated. One reviewer says external APIs used in the demos no longer work. Others find the early lessons slow, one says the course jumps between topics after section 14, and a JavaScript newcomer hit a steep difficulty spike.

The rating is 4.6 from over 23,000 reviews, with roughly nine in ten at four or five stars. The last update was in September 2026, though reviewers still flag the later lessons as dated. For a paid course it is good value if you can already code a little and want CI-ready tests. If you are brand new to JavaScript, learn that first, and expect to skip or skim the mock server lessons.

Best forTesters and developers with basic JavaScript who want to run Postman API tests in Jenkins or another CI server.
Skip it ifYou have never written JavaScript, or you want a short course without outdated mock server and collection lessons.

Pros

  • Clear, friendly explanations that reviewers say make tricky topics easy to follow
  • Covers CI in practice: Postman CLI, Newman and a full Jenkins section
  • Quizzes and practice sections, some coding exercises with solutions to watch
  • Rated 4.6 from over 23,000 reviews, with about 139,000 students enrolled

Cons

  • Later sections, including collections and mock servers, are called outdated by several reviewers
  • Early lessons can feel slow and long, and some reviewers say the later structure jumps around
  • Needs basic JavaScript, and a few exercises have no solution video, which tripped up one newcomer
Very solid and exhaustive course, Valentin is a talented teacher, who explains topics in a very friendly way and makes things easy to understand.
Kamila Gawron, a student

Listed for all levels, but the requirements assume basic JavaScript, HTTP and REST knowledge, so it suits early intermediate learners.

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What you will learn

  • Create GET, POST, PUT, DELETE requests
  • Understand GET vs POST request method
  • Work with real-world APIs (Github API, Trello API)
  • JavaScript basics for tests
  • Write API tests in Postman
  • Use data from Excel files (CSV) or JSON
  • Use Postman variables to create workflows and scenarios
  • Run API tests with Newman in Jenkins, GitLab CI or TeamCity
  • Use OAuth2, API keys, tokens, JWT, basic auth
  • Test file uploads
  • Use mock servers
  • Collaborate using Team Workspaces

Course content

19 sections · 254 lectures · 19 hours of video 48 quizzes, 5 coding exercises, 1 assignment, 24 articles

  1. 1Introduction and first steps in Postman 4 free previews9 lectures · 2 quizzes · 34 min
  2. 2Creating REST API requests with Postman44 lectures · 9 quizzes · 2.7 hours
  3. 3Practice section - Building REST API requests17 lectures · 5 quizzes · 1 hour
  4. 4Introduction to API testing & JavaScript30 lectures · 8 quizzes · 2.9 hours
  5. 5Writing basic API tests17 lectures · 3 quizzes · 1 hour
  6. 6Using Postman variables in scripts25 lectures · 11 quizzes · 2.2 hours
  7. 7Using Postman environments & environment variables11 lectures · 1 quiz · 1 hour
  8. 8Practice section - Adding tests to an API23 lectures · 8 quizzes · 1.3 hours
  9. 9Advanced assertions7 lectures · 1 quiz · 44 min
  10. 10Postman Automation basics 1 free preview10 lectures · 36 min

Who it is for

The instructor says it suits

  • This course is targeted towards testing engineers and developers.

What you need before you start

  • Registering to a few reputable public APIs is required for you to be able to follow along with the course
  • Basic programming and/or JavaScript knowledge is required (needed for writing tests)
  • Basic HTTP knowledge required (address, message body, headers, cookies, ...)
  • Basic knowledge about RESTful APIs and JSON
  • Basic Jenkins experience, if an integration with Jenkins is desired
  • Basic NodeJS/NPM experience (needed for test automation)
  • Optional - Basic Docker experience (for Jenkins or Newman)
  • A computer with Windows, macOS or Linux is required for viewing the lectures and installing Postman. Using a mobile phone/tablet is not recommended.

How it compares

Against the other 281 rated Udemy courses in Software Testing on CourseDuck:

  • Rating4.6 out of 5higher than 71% of them
  • Reviews23,675#7 of 282 by number of reviews
  • Length19.2 hourslonger than 86% of them
  • Last updatedSeptember 2026more recently than 98% of them

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Course Description

Learn Postman with a Postman Supernova.

RESTful APIs (or simply REST API) are everywhere nowadays, but at the same time, they are getting more complex to get started with: different HTTP methods (GET, POST, PUT, PATCH, DELETE), headers, cookies, dealing with file uploads or authentication with API keys, tokens, OAuth and so much more.

This is where the Postman App comes in! Postman allows you very quickly to create a request with the required HTTP method and parameters, submit the request and easily inspect the results.

I have created this course for testing engineers as well as for software developers or other technical positions.  Postman can help you during the development of your API, as well as after the API is completed, by running tests that make sure your API is still working as intended.

In the first part of the course, we will start exploring the features of Postman and continue by writing API tests with the intention of integrating them into a CI server where the tests will run on a current basis.

But this is not the normal course you take part in. Because your needs may be different and because I hate leaving you wondering what to do next, the second part of the course will include user questions and answers to problems that were not yet covered in the course or that are more specific and may not interest everybody.

So let’s look at what you are going to learn:


  • HTTP request methods (GET, POST, PUT, PATCH, DELETE)

  • JSON format

  • Start with simple requests and advance toward more complex scenarios

  • Learn to deal with authentication/authorization mechanisms like Basic Auth, API Keys, or OAuth.

  • Start writing API tests

  • Organize tests in collections and share them with your team

  • Run API tests in Jenkins or any other CI server

  • You ask, I answer

So after this course, you will know how to use Postman as a pro.

Excited to learn Postman? Join the course today.


Legal Disclaimer

This course is an independent educational resource and is not endorsed by, affiliated with, or associated with Postman, Inc., or any of its products. Postman is a trademark of Postman, Inc. All product names, logos, and brands mentioned in this course are the property of their respective owners.

This course contains promotional materials.
Read More All Levels All Levels product length iconTime: 19.2h

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Instructor Details

Valentin Despa

I teach IT professionals what I wish I'd known earlier.

My foundation is built on years in the trenches as an Agile Enterprise Software Developer, engineering solutions for everything from fast-paced start-ups and SMBs to large global corporations. I hold recognized roles as an AWS Community Builder, Postman Supernova, and GitLab Hero, alongside a deep history of securing and building major open-source projects.

For over a decade, I've taken that real-world experience and quietly built one of the largest learning communities around API tooling, test automation, and DevOps practices. What started as a side YouTube channel turned into hundreds of thousands of learners, conference talks, and team workshops at companies most IT professionals have heard of.

The thread through all of it is the same: take something that looks intimidating and break it down so anyone can understand it in plain language.

Lately, I've been spending more time on practical AI in the workplace. I look at how teams can leverage AI for both everyday knowledge work and hands-on IT engineering, like coding and testing. I focus on cutting through the hype to figure out how AI actually helps IT professionals get work done, build, and ship faster. New formats, same approach.

Read More

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Reviews

4.6

23,675 ratings on Udemy

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By Ekaterina Farafontova on 8/26/2026

Just finished this course and it's fantastic! Clear explanations, great hands-on projects, and you'll walk away with practical API testing skills. Well-structured and worth every penny. Highly recommend for anyone wanting to master Postman. Thank you, Valentin!

By Facundo Diaz on 6/22/2026

I like that it's progressive, that they evaluate you every so often, and the instructor's English is very understandable; it's a nice touch because I'm not a native English speaker and my listening comprehension isn't the best either.

By Kamila Gawron on 6/14/2026

Very solid and exhaustive course, Valentin is a talented teacher, who explains topics in a very friendly way and makes things easy to understand. I truly learned a lot. I don't give 5 only because some of the lectures (in the second part of the course) are based on Postman version that is a bit out of date.

By Nageswar R Reddy on 5/8/2026

hi, I recommend every one to taken up this course for sure if they really wants to learn and practice same time, each section is explained clearly with examples and after completion of each concept having quiz or exercises which make us more comfortable to know the concepts in better way

By Junior Ntuli on 4/21/2026

The course is excellent, i am learning alot. the last time i did javascript was when i was still a student more than 20 years ago and now i am learning it again because i forgot all.

By Filip Żmuda on 3/14/2026

The course is very good, but for someone who spent some time on programming, repeating in every troubleshooting (and not only) video to copy variables names, to check request URL and to don't force API to do something it is not capable of becomes a bit annoying.

By Luyanda Mkhize on 3/13/2026

I love how every concept and terminology is explained in the simplest way. Easy to understand to the point that you do not need to repeat sessions.

By Sy on 3/10/2026

This course provides a clear and thorough explanation of API testing with Postman, covering everything from manual testing to automated testing. Although test scripts need to be written in JavaScript, the course includes introductory JavaScript lessons, making it accessible even for beginners with little to no programming experience. However, despite being labeled a “complete guide,” the course does not currently cover some of Postman’s newer features, such as SPECS or Postman AI. I hope these will be added in future updates. Overall, this course is highly recommended for anyone who wants to start API testing or learn how to create automated tests using Postman.

By Nikolay Yurukov on 3/6/2026

Well structured, with a lot of examples. Gives excellent idea what Postman could be used for. Definitely a must to take one!

By Zac Israel on 2/11/2026

I must give this course five stars. It was excellent, and the instructions were clear from start to finish. Although I already had quite a bit of experience with Postman, this course taught me so much more. I now feel much more confident and have a stronger understanding of how to test requests more effectively—using variables, pm.tests, environments, collections, Newman, and the Postman CLI. Professor Despa is outstanding, and I highly recommend this course.

By Jelena Miletic on 11/21/2020

it is good

By Shivam Verma on 11/21/2020

Step by step procedure is good.

Showing 12 of 318 reviews

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Quality Score

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Overall Score : 92 / 100

Postman: The Complete Guide - REST API Testing
Visit course on Udemy Write a review
  • Video Duration: icon 19.2h
  • Price: $16.99
  • Provider: icon Udemy
  • Updated: icon September 2026
  • Level: All Levels All Levels
  • Language: icon English
  • Certificate: icon Yes
  • Lectures:254 in 19 sections
  • Practice:48 quizzes, 5 coding exercises
  • Students:139,500
  • Subtitles:24 languages
  • Udemy badge:Bestseller
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