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Home › Postman API Testing
Study Material

Postman API Testing Downloads

This page lists Uncodemy's Postman API Testing notes, each as its own file. Postman is a tool for sending API requests and writing automated checks. Core features are collections, environments with variables, test scripts, the collection runner and the Newman command-line runner.

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Prepared by: Uncodemy trainer team · Reviewed by: Uncodemy reviewer · Last reviewed: 24 Oct 2026
Downloads

Download Postman API Testing Notes

Each resource is a separate file. Choose the one that matches what you need.

01
Set 1

Postman API Testing — Core Set

Covers collections, environments, and writing your first test scripts in Postman.

Updated 24 Oct 2026
Download Set 1
02
Set 2

Postman API Testing — Advanced Set

Focuses on the collection runner, Newman for CI/CD, and mocking servers.

Updated 24 Oct 2026
Download Set 2
03
Set 3

Postman API Testing — Practice Set

Practice-oriented notes with common mistakes to avoid, chaining requests, and negative testing.

Updated 24 Oct 2026
Download Set 3
Features

Postman features you will use

Key tools and features within Postman for API testing.

Feature What it does
Collection A saved group of requests, organised in folders
Environment and variables Switch base URLs and tokens between dev, test and production
Pre-request script Code that runs before a request, for example to set a value
Tests tab Scripts that check the response
Collection runner Run a whole collection, optionally with data files
Newman Command-line runner for collections, used in CI
Mock server Simulated responses for an API that is not ready
Example

Example test script

Check status, body field and response time.

pm.test('Status is 200', function () {
  pm.response.to.have.status(200);
});

pm.test('Response has an id', function () {
  const json = pm.response.json();
  pm.expect(json).to.have.property('id');
});

pm.test('Responds within 800 ms', function () {
  pm.expect(pm.response.responseTime).to.be.below(800);
});
Workflow

A simple workflow

Follow these steps to build and run your Postman tests.

Step-by-step guide

  1. Create a collection and an environment.
  2. Add requests using variables such as {{baseUrl}}.
  3. Add tests to each request: status, body and headers.
  4. Chain requests by saving values (for example a token) to variables.
  5. Run the collection, then run it in CI with Newman.
Pitfalls

Common mistakes

Watch out for these common pitfalls when testing with Postman.

Mistakes to avoid

  • Testing only the status code.
  • Hard-coding URLs and tokens: use environments.
  • No negative tests: add invalid input and missing-auth cases.
  • Storing secrets in shared collections.
Related

Related Uncodemy resources

API Testing Guide API Testing Interview Questions Playwright Automation Framework Software Testing Projects

Learn with a trainer

Prefer guided learning? Explore the Software Testing course or ask for a free demo.

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About this study material

This material is for learning and revision. It is not a certificate, a degree or a promise of a job, and technology changes, so check official documentation for the latest details. Spot an error? Write to info@uncodemy.com and the trainer team will review it.

FAQ

Frequently Asked Questions

What is Postman used for?
Postman is used to send requests to APIs, inspect responses and write automated checks, individually or as collections.
What is a Postman collection?
A collection is a saved group of API requests, organised in folders, that can be shared and run together.
What are environments in Postman?
Environments store variables such as base URLs and tokens so the same requests can run against different systems like test and production.
What is Newman?
Newman is the command-line runner for Postman collections. It lets you run collections in CI pipelines and produce reports.
Can Postman do automation testing?
Yes. With test scripts, the collection runner and Newman you can automate API checks. Larger suites are often built in code as well.
Are these resources free to download?
The download cards on this page link directly to the files. Use the button on the card that matches what you need.