Mastering Postman: Beginner's Path to Effective API Testing

Learn how Postman powers API testing and development. Explore core features including Postman API, Postman Echo, visualizer, libraries, workflow control, collaboration, monitors, GraphQL support, and documentation.

Install Postman on Windows, sign in, and explore workspaces, collections, environments, and history as you prepare to make your first API call and test APIs.

Learn to create your first API request in Postman, navigate the UI, organize with collections, and use the deck of cards API with parameters to receive a JSON response.

Explore what an API is, how client–server communication uses requests and responses, and how JSON or XML formats, authentication, and examples power real-world applications.

Explore http protocols and https security, and how browsers fetch resources with get requests. Master http status code ranges—100–199, 200–299, 300–399, 400–499, 500–599—for testing APIs with Postman.

Explore how to use get and post requests in Postman. Fetch data with get, and create resources with post, by practicing against the dummy API at request.in.

Master how to use put, patch, and delete in postman to manage a rest api, with full object updates, partial changes, and 204 no content responses.

Learn how to use query parameters in Postman by appending key-value pairs after the question mark to filter resources. Explore multiple query parameters and Postman's automatic URL updates.

Master how to add header parameters in Postman, including the authorization header with a bearer token. Generate a token and use it to authorize API requests to a bookstore API.

Explore passing path parameters in Postman, using curly brace placeholders in URIs for UUID, and two methods: direct URL insertion and Postman colon syntax with path variables, plus authorization tokens.

Learn to generate code snippets for API calls in Postman across languages such as Java, Node.js, Python, cURL, and Swift, using the code section and copy-paste workflow.

Import swagger apis into postman using a single url or a json object, generating a postman collection (pet store) with pet, store, and user endpoints for testing.

Learn to automate API testing with Postman by creating collections, writing tests for response time, status codes, and response body, and running collections to validate endpoints.

Learn to create and use Postman environments by defining environment variables such as base URL and count, then apply them to deck of cards API and bookstore API requests.

Learn what Postman monitors are and how to create a collection-based monitor that runs tests periodically to reveal your API's health, performance, and reliability.