API Testing with Postman: Beginner to Pro

Name: API Testing with Postman: Beginner to Pro
Rating: 4.6 (141 reviews)

Postman Essentials: Learn API Testing Without Coding, API Requests, Tests, Scripts and Mock Servers.

Created byKhair ullah

Last updated 5/2025

English

English [Auto],

What you'll learn

Understand the basics of APIs and how they work
Use Postman to send HTTP requests (GET, POST, PUT, DELETE, etc.)
Analyze and interpret API responses using Postman
Create and organize Postman collections for efficient API testing
Use environment variables and global variables to manage test data
Write test scripts using JavaScript for validation and automation
Implement pre-request scripts to dynamically modify requests
Automate test execution using the Collection Runner
Integrate Postman with Newman for command-line test execution
Apply real-world API testing scenarios in development and QA workflows

Course content

3 sections • 15 lectures • 51m total length

CREATING COLLECTION2:18
Create a Postman collection named contact list and organize it with two folders: basics endpoint and negative test. Add requests to the basics endpoint test folder to begin testing.
GET AND POST REQUEST6:51
Create and save basic endpoint requests in Postman to manage a contact list, including get, post, get by ID, put update, and delete operations.
PUT AND DELETE REQUEST4:07
Update a contact with a put request using the id in the url and updated fields, then delete it with a delete request and confirm a 204 response.
CREATING NEGATIVE REQUEST6:54
Create negative requests in Postman to validate API responses for 404 not found and 400 bad request scenarios, including missing fields, excessive length, invalid characters, and incorrect formats.
CREATING ENVIRONMENT VARIABLES3:57
Create and manage a Postman environment by adding variables with initial and current values, then use them in requests with curly braces and capture response data for later use.
SAVING RESPONSE4:10
Save the contact ID returned from the add contact request in Postman as an environment variable, then reuse it in the get contact request to retrieve the added contact.

STATUS TYPE ASSERTION3:23
Turn Postman requests into tests by adding status type assertions that validate status codes like 200, 404, and 400 for contact list and not found requests, then run tests.
BODY ASSERTION2:28
Learn to use body assertions in Postman to verify that the response body contains the expected text and email, testing get contact and add contact flows.
HEADER AND RESPONSE TIME ASSERTION4:48
Practice header and response time assertions in Postman by verifying content-type is application json and enforcing a collection-level response time threshold for all basic requests.
POSTMAN CONSOLE1:53
Learn how to use the Postman console to debug failed requests and assertions by inspecting request bodies and environment variables, fixing issues like missing first name to resolve 400 errors.
JASON ASSERTION3:26
Learn how to write JSON assertions in Postman to validate specific fields in a response. Use environment variables to power tests and add multiple assertions for first and last name.
NESTED JSON1:59
Learn to handle nested JSON responses in Postman by building and validating nested JSON assertions, using location and city name paths, and leveraging environment variables for dynamic values.

COLLECTION RUNNER1:15
Automate api tests with the collection runner to execute all requests in a collection, instead of manual sends. Run collection, select environment, and debug failures in the console.
EXPORTING1:14
Export your Postman collection and environments as JSON to run them from the command line. Save the files to your desktop and optionally rename them for easy access.
RUN COLLECTION USING NEWSMEN2:35
Install and verify Newman, then run a Postman collection from the command line with Newman run using collection and environment files, and review the results and pass/fail status.

Requirements

Willingness or Interest to Learn about Postman for Success.

Description

CRITICAL NOTICE Prior to Enrollment:

This course does not serve as a substitute for official vendor materials necessary for certification exams. It lacks endorsement from the certification vendor, and participants will not receive official certification study materials or a voucher as part of this course.

Unlock the power of API testing with Postman, the industry-leading tool used by developers, testers, and DevOps professionals around the world.

Whether you’re a complete beginner or looking to sharpen your API testing skills, this course is designed to take you from the fundamentals to advanced techniques, all in one practical, hands-on learning journey.

You’ll start by understanding what APIs are and why they are critical in today’s software development landscape.

Then, you’ll dive into Postman and learn how to send API requests, analyze responses, and create organized collections for testing.

As you progress, you’ll explore how to use environment variables, scripting, pre-request scripts, and test assertions to automate and validate your API workflows.

This course will also show you how to work with Postman features like Collection Runner, Newman CLI, monitors, mock servers, and public documentation.

You’ll learn how to debug APIs, chain requests, and build dynamic test suites that help you simulate real-world usage scenarios.

Whether you’re working in a small startup or a large enterprise, these skills will equip you to test and automate APIs with confidence.

By the end of the course, you’ll have built a solid foundation in Postman and will be able to write efficient, automated API tests that save time and increase the reliability of your applications.

This course is packed with practical examples, hands-on exercises, and real-world use cases to ensure you gain the confidence and skills needed to apply Postman in your day-to-day development or testing workflow.

No prior experience with APIs or Postman is required — just bring your curiosity, and by the end, you’ll be comfortable using Postman like a pro.

Thank you

Who this course is for:

Beginners who want to learn API testing from scratch with no prior experience
Software testers and QA professionals looking to enhance their API testing skills
Developers who want to understand how to test and debug APIs efficiently
Automation engineers interested in adding Postman to their testing toolkit
Students and aspiring tech professionals preparing for real-world software projects
Anyone working with APIs who wants to improve their testing, automation, and collaboration workflow

API Testing with Postman: Beginner to Pro

What you'll learn

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Course content

GETTING START6 lectures • 28min

SIMPLE ASSERTION6 lectures • 18min

RUNNING COLLECTION3 lectures • 5min

Requirements

Description

Who this course is for: