POSTMAN

Test and debug RESTful APIs efficiently using Postman’s powerful
features like collections and environments.

Postman - API Testing and Collaboration Tool

1. What is Postman?

Postman is a collaboration platform for API development and testing. It allows users to send HTTP requests, inspect responses, automate workflows, and document APIs.

2. Installing Postman
3. Creating Your First Request
4. HTTP Methods Supported

Postman supports all common HTTP methods:

5. Headers and Parameters

Customize requests with headers and parameters:

6. Body (for POST/PUT)

Used to send data in POST, PUT, or PATCH requests.

{
"name": "John",
"email": "john@example.com"
}

Select Body → raw → JSON for JSON input.

7. Viewing the Response
8. Saving Requests to Collections

Collections group related requests together.

9. Authentication Methods

Postman supports various authentication schemes:

10. Importing API Collections

Import APIs from files, links, or OpenAPI/Swagger definitions:

Postman Environments, Scripting, and Automation

11. Environment and Global Variables

Variables help reuse values across requests and environments (e.g., API URLs, tokens).

12. Pre-request Script

Runs JavaScript code before a request is sent (e.g., generate tokens, time-stamps).

// Example: Add timestamp header
pm.environment.set("timestamp", Date.now());
13. Tests (Post-request Scripts)

Run JavaScript after request is sent to validate the response.

pm.test("Status code is 200", function () {
  pm.response.to.have.status(200);
});
14. Using Console

Postman Console helps debug pre-request and test scripts.

15. Running Collections with Collection Runner

Execute a full collection of requests for automated testing.

16. Data-Driven Testing

Run the same request multiple times with data from a file.

17. Mock Servers

Simulate API endpoints when backend isn’t ready.

18. Monitor APIs

Postman Monitors automatically run requests at scheduled intervals.

19. Sharing Collections

Collaborate with your team by sharing collections.

20. Using Postman with Git

Postman supports version control via Git using the Postman API or exporting collections.

Postman Collaboration and Advanced Features

21. Workspaces

Workspaces let teams collaborate on shared APIs, collections, and environments.

22. Postman Visualizer

Use HTML + JavaScript to render API response data visually inside Postman.

const template = ` {{#each response}} {{/each}}
Name Email
{{name}} {{email}}
`;
pm.visualizer.set(template, { response: pm.response.json() });
23. APIs Tab (API Lifecycle Management)

Manage your API's full lifecycle inside Postman using OpenAPI/Swagger schema.

24. Postman CLI (Newman)

Newman is Postman’s command-line runner for automating collection runs.

25. Postman Echo

Public API endpoints for learning and testing Postman features.

26. Code Snippets (Request Generators)

Generate sample code for sending requests in different languages.

27. History Tab

Keeps track of every request sent (including temporary unsaved ones).

28. Postman Cloud Sync

All saved requests, environments, and collections are backed up to the cloud if signed in.

29. Roles and Permissions

In Team workspaces, manage access to collections and environments.

30. Integrations

Postman can be integrated with tools like Slack, GitHub, Jenkins, and more.

Postman Reference Links

1. Official Postman Website

Main site for downloads, features, and product updates.

https://www.postman.com/

2. Postman Learning Center

Comprehensive documentation and learning guides for beginners to advanced users.

https://learning.postman.com/

3. Postman API Reference

Details on how to programmatically use Postman's own API (manage workspaces, collections, etc.).

Postman Public Workspace

4. Postman YouTube Channel

Watch webinars, tutorials, and feature releases.

https://www.youtube.com/c/Postman

5. Newman (CLI) Documentation

Guide to running Postman collections from the command line using Newman.

https://www.npmjs.com/package/newman

6. Postman Blog

Read about use cases, tutorials, and industry trends.

https://blog.postman.com/

7. Postman Public API Collections

Explore and fork thousands of collections shared by the community and companies.

https://www.postman.com/explore

8. Postman GitHub Repository

Source code for open-source Postman tools like Newman.

https://github.com/postmanlabs