Postman Quickstart for Beginner: Learn API Testing in 1 Hour

Install postman on your local system by downloading from postman.com/download and running the postman exe, then sign in or create an account and set a light theme.

Create your first Postman request using the JSON placeholder API, selecting a get endpoint, pasting the url, and sending the request to see a 200 ok response and its details.

Explore the Postman response viewer and the api response layout. Learn about body views (pretty, raw, preview, visualize), cookies, headers, status codes, timing, and options to save or clear.

Group hundreds of APIs with Postman collections to organize endpoints into folders within a workspace, and save requests like all products and all posts for efficient API testing.

Learn to create and use variables in postman, set a base URL, and modify endpoints with double curly braces, using global scope and initial vs current values.

Learn to send http requests with postman, switch between verbs like get, post, put, patch, and delete, and test api endpoints using the url input and the send button.

Learn how to use the post method in Postman, sending data in the body to create a new server resource, and verify creation with a 201 status.

Learn how to use query parameters with a get request to filter API data, including composing key-value pairs, optional versus mandatory parameters, and testing with Postman.

Learn how a put request overwrites a whole resource at a given URL, replacing the object via the request body, in contrast to patch which updates only specific fields.

Demonstrate patch requests to update a specific field of an item via json at /api/item/{id}, using localhost:3000 and changing the name from Netflix to Amazon Prime, with status verification.

demonstrates deleting an item via the delete API by sending a request to /api/items/{id}, confirming with a 200 status and verifying the item is removed.

discover how Postman environments act as containers for variables to streamline API testing across development, testing, staging, and production by defining and swapping a base URL.

Create a local environment in Postman and set a base URL variable to localhost:3000, then switch between environments to test your APIs.

Explore end-to-end API testing by setting up dependencies with npm, creating a local node server, and exercising get, post, put, patch, and delete endpoints with postman.

Explore how Postman handles authorization in REST APIs, including basic auth, bearer tokens, JWT, and OAuth 1.0/2.0, with a practical GitHub example that creates and uses a personal access token.