API Testing Fundamentals with Postman

Understanding how applications communicate behind the scenes is an essential skill in modern software development and quality assurance. APIs power today's digital web, making API testing a valuable skill for technical roles. This text-based course introduces core API concepts, architectural patterns, and HTTP protocols before guiding you through practical testing workflows in Postman. What you'll learn: Learn fundamental API definitions, HTTP request methods, headers, and status codes. Navigate the Postman interface and set up structured workspaces. Create and execute GET, POST, PUT, and DELETE requests with custom payloads. Utilize environment variables and collections to streamline testing routines. Write basic JavaScript test assertions to validate API responses automatically. Explore modern concepts like mock servers and OpenAPI definitions. You will begin by establishing foundational terminology before progressing into step-by-step written exercises that simulate real-world testing scenarios. This course is tailored for absolute beginners, aspiring QA engineers, and junior developers with no prior API experience needed. Start reading now to build your API testing skillset.