Postman API Fundamentals: Learn to Work with REST APIs 2026

Create a blank workspace in the postman desktop app to organize api projects as a central hub for collections, environments, apis, mock servers, and team collaboration.

Create and name a collection in Postman to organize related API requests, store endpoints in your workspace, and use it to store and execute API requests throughout this course.

Send your first api request to retrieve books using the Postman library api by composing a get request, understanding url, status codes, and the json response.

Master using variables in Postman to store the base URL and other values, making API requests reusable, efficient, and editable within collection scope.

Filter API responses with query parameters to fetch fiction books or those not checked out, building requests with a question mark and ampersand in Postman.

Use path variables to fetch a specific book by its id in a REST API, and distinguish them from query parameters with practical Postman library API examples.

Add a new book to the Postman library API by sending a post request with a JSON body containing title, author, gender, genre, and year published; authentication is required.

Learn how to authenticate the Postman API requests by adding an API key to the request header, enabling secure create operations and viewing created books by ID.

Set the authorization at the collection level with the Postman authentication helper so all requests inherit the API key and simplify testing of create and fetch flows.

Master Postman variables and scopes, including collection variables, to build dynamic requests, write your first pre-request and post-request scripts, and access response data with the PM object and console logs.

Learn to extract the id from the response data and store it as a Postman collection variable using the pm object, then reuse it in subsequent requests.

Update a library book's checkout status using a patch request with the book id and json body, demonstrating checkout true and false via api key authentication.

Learn to delete a book by ID with a delete request in Postman, interpret 200 no content as success and 404 not found, and verify with get by ID.

Generate code snippets for API calls in multiple languages with Postman's codegen feature. Copy and run the code from the code tab, and compare it to the human-readable API response.

Explore APIs with Postman: build get, post, patch, and delete requests; interpret responses, read API documentation, authorize, set variables, automate scripts, and generate API call code.