We have talked about the tools that are used for api testing but what if I don't want to go through the task of downloading and installing the api testing tools and want a quick work? Here, comes extensions, such as thunder client, HTTP Client etc. These extensions are very helpful that they are now replacing these tools as well. We can download these extensions on our normal day to day used IDEs like VS Code, Eclipse etc. Their performance and usage is simpler than the tools. We will be discussing such extensions for popular IDEs.