REST Client is a Visual Studio Code extension that lets developers send HTTP requests and view responses directly within the editor.
The extension solves the problem of needing a separate tool to test REST APIs by integrating request composition and response inspection into the editor workflow. It works by allowing developers to write HTTP requests in `.http` or `.rest` files, execute them with a single action, and view formatted responses in a side pane. Multiple requests can be composed in a single file using `###` delimiters, and responses support syntax highlighting, image rendering, and customizable preview modes.
Developers should adopt this tool if they want to keep API testing within their editor without context switching. It suits projects of any scale that involve REST or GraphQL API development. The extension handles authentication scenarios including Basic Auth, Digest Auth, SSL certificates, Azure Active Directory, AWS Signature v4, and AWS Cognito. It supports environment-based configuration with custom variables, system variables for timestamps and random values, and the ability to reference environment variables or dotenv files. Code snippet generation for multiple languages and cookie persistence across requests are included. The tool also handles SOAP requests and cURL command conversion.
The project maintains active development with regular updates addressing both new features and bug fixes. The codebase shows consistent refinement of existing functionality rather than major architectural shifts. Community engagement through issues and pull requests indicates ongoing responsiveness to user needs and reported problems.
