Postman Study Notes

API Keys and Custom Headers

Learn how to authenticate requests using API keys and how to work with custom HTTP headers in Postman, including placement options and common conventions.

Basic and Bearer Token Auth

Learn how HTTP Basic Authentication and Bearer Token Authentication work, and how to configure each correctly in Postman's Authorization tab.

Certificate and Proxy Settings

Learn how to configure client-side TLS certificates, manage CA certificate verification, and route Postman traffic through a proxy for corporate networks or tr…

Chaining Requests with Extracted Data

How to pass data from one Postman request's response into the next request by extracting values in a test script and storing them as variables.

Collection and Global Variables

Learn the difference between collection variables, scoped to one collection, and global variables, available everywhere, and when to use each.

Collection Runner

Learn how Postman's Collection Runner executes an entire collection of requests in sequence, complete with data-driven iterations, delays, and detailed pass/fa…

Collections Basics

Learn how Postman Collections group related API requests into a single organized, shareable, and runnable unit.

Designing APIs with Postman (OpenAPI Import)

Using Postman's API Builder to design an API from an OpenAPI specification, generate mock servers, and keep implementation in sync with the contract.

Dynamic Variables and Faker Data

How to use Postman's built-in dynamic variables like {{$guid}} and {{$randomEmail}} to generate realistic fake data on every request.

Environments and Variables

Understand how Postman Environments let you swap base URLs, tokens, and config values between dev, staging, and production without editing every request.

HTTP Methods in Postman

How to use GET, POST, PUT, PATCH, and DELETE requests in Postman, including when each method applies and how to attach a request body.

Importing and Exporting Collections

Learn how to move Postman Collections between teammates, tools, and environments using export files, Postman links, and API-spec imports.

Making Your First Request

A step-by-step walkthrough of building and sending your first GET request in Postman, reading the response, and saving the request for reuse.

Managing Secrets Safely

Learn how to store, share, and rotate API keys, tokens, and passwords in Postman using variable scopes, secret-typed variables, and Vault integration without l…

Mock Servers

Postman Mock Servers simulate API responses from a collection's saved examples, letting frontend and backend teams work in parallel before the real API exists.

Monitors and Scheduled Runs

Postman Monitors run your collections automatically on a schedule from multiple regions, alerting you the moment an API starts failing or slowing down in produ…

Newman: Running Collections from the CLI

Newman is Postman's command-line collection runner, letting teams execute collections, generate reports, and fail builds without opening the Postman app.

OAuth 2.0 in Postman

Understand the OAuth 2.0 authorization framework and how to configure grant types, token retrieval, and token refresh using Postman's OAuth 2.0 Authorization t…

Organizing Requests with Folders

Learn how to use folders inside a Postman Collection to group related requests, apply shared settings, and control execution order at scale.

Postman Best Practices

A practical guide to organizing collections, scoping variables correctly, and writing maintainable scripts and tests in Postman.

Postman/Newman in CI/CD Pipelines

Integrating Postman collections into CI/CD pipelines via Newman lets teams catch API regressions automatically on every commit, before code reaches production.

Postman Interview Questions

Commonly asked Postman interview questions covering variable scoping, scripting, authentication, and CI/CD integration, with concise model answers.

Postman Quick Reference

A condensed cheat sheet of Postman variable scopes, common pm.* scripting snippets, and Newman CLI commands for everyday use.

Postman vs Insomnia vs curl

Comparing Postman, Insomnia, and curl across usability, collaboration, scripting, and automation to decide which fits a given API workflow.