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Quick Introduction to Postman and API Testing for Beginners
Role Play
Highest Rated
Rating: 4.6 out of 5(22,765 ratings)
108,718 students

Quick Introduction to Postman and API Testing for Beginners

Learn Postman and REST API testing real FAST. Learn 80% of what you need in 20% of the time.
Role Play
Highest Rated
Created byValentin Despa, Valentin Despa - Support
Last updated 10/2025
English

What you'll learn

  • Introduction to APIs by using Postman
  • Start using Postman
  • Overview of the HTTP messages
  • Use query parameters, path variables and headers
  • Read/write JSON
  • Write basic API tests
  • Work with Postman variables
  • Create simple workflows
  • Learn HTTP request methods: GET, POST, PATCH & DELETE

Course content

5 sections • 51 lectures • 3h 10m total length

  • Course materials0:19
  • How to install Postman2:29

    In this lecture we are going to install the Postman app. Just in case you are using a Postman Google Chrome extension, please remove that and use the standalone app.

  • Updating Postman0:12

    Keeping Postman up-to-date is very important. Make sure you always have the most recent version as it may include bug fixes, new features or important security updates.

  • About the course3:22
  • A quick introduction to APIs2:56

    This lecture provides a quick introduction to APIs, explaining their significance as application programming interfaces. The lecture emphasizes that APIs serve as interfaces to data on remote servers, enabling program communication and data exchange. It introduces Postman as a tool that simplifies API usage without requiring coding or complex commands. Through practical examples, attendees gain hands-on experience to demystify APIs.

  • Your first Postman request3:55

    This lecture jumps into create your first request with Postman.

  • The HTTP protocol explained4:59

    This lecture provides an introduction to HTTP and API communication using Postman. We briefly discuss the need for the HTTP protocol, request methods, headers, and the structure of HTTP messages. You will understand the importance of using HTTPS for secure communication and the components of a request and response, including URLs, status codes, headers, and bodies. You will gain insights into reading API documentation, following conventions, and creating HTTP messages. This lecture sets the foundation for further exploration of HTTP requests and responses in API interactions.

Requirements

  • Desire to learn Postman and APIs.
  • The possibility to install Postman on Windows, macOS or Linux
  • No programming experience needed, but it can be useful later on.

Description

Do you need to learn about Postman & APIs for your new position or for a job interview? 

You are not the first one.  REST APIs are everywhere nowadays but you may not know where to begin. If you are a total beginner to APIs and are looking for a quick introduction to API by using Postman. This course is for you.


What are APIs all about?

Today, all IT systems are interconnected by using APIs, which are a way to exchange data, mostly by using a format call JSON.

However, learning about APIs can easily get confusing. You need to know: different HTTP methods, headers, cookies, dealing with file uploads or authentication with API keys, tokens, OAuth and so much more.

This is where Postman 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.

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 this Postman crash course for beginners, we will start exploring the features of Postman, creating requests, and building simple workflows. Then we will continue by writing API tests and automatically running a Postman collection by using the Postman Collection Runner and Newman.


Is this course for me?

If you need to get up to speed with Postman and start using APIs and don't have a lot of time, this course will probably take you very far in a very short time. You don't need much to get started, but you need to invest more than 3 hours. Just watching the content may not be enough to develop the skills needed. You need to do the work and the practice assignments.


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

  • Start with simple requests

  • Use HTTP methods like GET, POST, PUT & DELETE

  • Understand the difference between GET vs POST.

  • Work with query parameters and path variables

  • Understand HTTP headers

  • Learn to deal with authentication (for example using Bearer token)

  • Start writing API tests with JavaScript

  • Organize tests in collections and share them with your team

  • Run API tests using the collection runner or Newman

So after this course, you will have an overview of Postman and can later decide in which areas you want to learn more.

Excited to learn Postman? Join this 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.

Who this course is for:

  • This course is targeted towards testing engineers and developers.
  • Anyone who needs a quick introduction to Postman

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