REST Client is a Visual Studio Code (VS Code) extension that allows you to send HTTP requests and view the responses directly in VS Code. In the past, my go-to application for testing my REST API endpoints was Postman. Postman has many advanced features that cannot be completely replaced with the REST Client extension. However, since you need to switch between two different apps (VS Code and Postman), I find REST Client to be more convenient 90% of the time I test my endpoints. In this brief blog article, I will explain how to set up global variables that can be reused in different environments within the REST Client extension.