Free online coursePostman tutorial to test requisitions

Course Description

Strengthen your software testing profile by learning how to test APIs with Postman, one of the most widely used tools for exploring services, verifying integrations, and troubleshooting issues before they reach production. This free online course is designed for anyone who wants a practical starting point in API testing, whether you are moving from manual testing to modern QA workflows, beginning in backend development, or simply need confidence working with web services.

You will start from the essentials by getting Postman installed and understanding the interface, so you can work comfortably in the app and follow a clean workflow from the first day. From there, you will connect the tool to core API concepts, learning what an API is, how requests and responses work, and why this communication model is critical for modern applications. By grounding the tool in real fundamentals, you will be able to reason about what you are testing rather than just clicking buttons.

As you progress, you will practice sending requests and interpreting outcomes in a way that reflects real QA tasks. You will learn how HTTP works in the context of testing, including the meaning behind response codes, so you can quickly identify common problems like authorization failures, server errors, missing resources, or invalid requests. You will also understand the differences between popular API styles, including REST, SOAP, and GraphQL, which helps you recognize what to expect when you join new projects or test unfamiliar systems.

Finally, you will work with the most common HTTP methods used in REST APIs, covering how and when to use GET and POST, and how PUT, PATCH, and DELETE differ when updating or removing data. You will also learn to organize your work using collections in Postman, an essential step for keeping tests maintainable, repeatable, and easy to share with a team. By the end, you will be able to build a clear, professional workflow for testing endpoints, analyzing responses, and keeping your API testing work structured as it grows.