API Testing with Postman, Hoppscotch, and Insomnia

This hands-on course teaches you how to test APIs from the ground up using modern tools and real-world examples. You’ll begin by learning the core concepts of APIs and the HTTP protocol, then move into designing and executing effective test cases that mirror widely used industry practices.

Whether you’re new to API testing or looking to sharpen your skills, you’ll build functional, boundary, and negative test scenarios based on API specifications like OpenAPI/Swagger, as well as user stories and practical workflows.

You’ll get hands-on with:

• Postman, the most widely adopted API testing platform used by teams across the industry.
• Hoppscotch, a lightweight, open-source tool for fast, browser-based API testing.
• Insomnia, a powerful tool for chaining requests, managing environments, and organizing complex test suites.

In the later modules, you’ll apply your skills in real-world testing scenarios:

• Build and organize complete test suites for e-commerce and workflow-driven APIs.
• Integrate API tests into CI/CD pipelines for automated regression testing.
• Mock APIs for early and isolated testing.
• Debug and troubleshoot failed requests using advanced tooling.

By the end of this course, you’ll be equipped to confidently design, execute, and automate API tests—choosing the right tools and strategies to fit your team or project needs.