Postman: The Complete Guide - REST API Testing

Postman: The Complete Guide - REST API Testing

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What you will learn

  • Work with the Postman App

  • Submit RESTful requests using Postman

  • Write API tests using JavaScript

  • Automate test execution


Section 1: Introduction and first steps in Postman

Section 2: Creating with API requests

Section 3: Writing tests and scripts

Section 4: Writing tests and scripts using variables

Section 5: Advanced assertions

Section 6: Automatically running tests

Section 7: Workflows and Scenarios

Section 8: Mock servers

Section 9: File uploads (testing, automatic uploads, uploading multiple files)

Section 10: Authentication / Authorization

Section 11: Advanced topics and user questions

Section 12: JavaScript fundamentals

Section 13: Postman News & Updates

Section 14: Retired content

Course Description

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


  • 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 integration with Jenkins is desired
  • Basic NodeJS/NPM experience (needed for test automation)
  • Optional - Basic Docker experience (for Jenkins or Newman)


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, headers, cookies, dealing with file uploads or authentication with API keys, tokens, OAuth and so much more.

But before you start investing time writing code to retrieve the data the API is offering, why not test the request first to make sure everything is working as expected?

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

Postman can help if you are developing APIs as well! I have created this course for testing engineers and well as for software developers.  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 in 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:

  • Start with simple requests and advance towards 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? Sign-up up today!

Who this course is for:

  • This course is targeted towards testing engineers and developers.