TypeSpec MCP Server and Emitter

What is TypeSpec MCP Server and Emitter?

The TypeSpec MCP Server and Emitter is a set of packages for building Model Context Protocol (MCP) servers using the TypeSpec language. It includes an MCP server that assists in developing MCP extensions, a TypeSpec library for describing MCP servers (e.g., the @tool decorator), and emitters that automatically generate JavaScript server implementations or HTTP wrappers for REST APIs.

How to use TypeSpec MCP Server and Emitter?

Install via VS Code’s one-click buttons or by manually adding an .vscode/mcp.json config with npx -y mcp-server-typespec@latest. After installation, switch GitHub Copilot to Agent mode, refresh the tools list, and invoke commands like init, compile, or build. Requires Node.js 20 or later and VS Code with GitHub Copilot and Copilot Chat extensions.

Key features of TypeSpec MCP Server and Emitter

• MCP server with tools for authoring TypeSpec extensions
• TypeSpec library including the @tool decorator
• Emitter generates JavaScript MCP server implementation
• Emitter generates JS server for calling remote REST APIs
• Built-in tools: learnTypeSpec, init, compile, build

Use cases of TypeSpec MCP Server and Emitter

• Scaffold a new MCP project with example tool implementations
• Auto‑generate server code from TypeSpec definitions
• Learn TypeSpec syntax and patterns via the learnTypeSpec tool