API Test Automation with C#: RestSharp, NUnit, and Postman

In modern software development, APIs are the backbone of application communication, making API testing an essential skill for any quality assurance professional. This course guides you from absolute beginner to building your first automated API testing framework using a clean, minimal toolset. You will transition from manual API exploration to writing robust, maintainable automated test suites. By understanding how web services communicate over HTTP, you will gain the confidence to validate payloads, handle asynchronous responses, and write clean C# automation code. What you'll learn: - Understand core API concepts, HTTP methods, status codes, and JSON structure. - Master manual API testing and payload validation using Postman. - Build an automated testing project from scratch using C#, NUnit, and RestSharp. - Parse and validate complex JSON responses using popular serialization tools. - Apply asynchronous programming patterns (async/await) to write high-performance API tests. - Configure and manage project dependencies efficiently using the NuGet package manager. The course begins with foundational concepts of web services and manual testing before advancing to C# environment setup. You will then progress step-by-step through writing automated scripts, validating schemas, and structuring a clean, maintainable test suite. This course is designed for beginners to API testing and quality assurance, with no prior test automation experience required. Start reading today to build your foundation in API test automation.