VSCode LSP MCP

🔍 Overview

VSCode LSP MCP is a Visual Studio Code extension that exposes Language Server Protocol (LSP) features through the Model Context Protocol (MCP). This allows AI assistants and external tools to utilize VSCode's powerful language intelligence capabilities without direct integration.

vscode-ext demo

🌟 Why This Extension?

Large language models like Claude and Cursor struggle to understand your codebase accurately because:

They rely on regex patterns to find symbols, leading to false matches
They can't analyze import/export relationships properly
They don't understand type hierarchies or inheritance
They have limited code navigation capabilities

This extension bridges that gap, providing AI tools with the same code intelligence that VSCode uses internally!

⚙️ Features

🔄 LSP Bridge: Converts LSP features into MCP tools
🔌 Multi-Instance Support: Automatically handles port conflicts for multiple VSCode windows
🧠 Rich Code Context: Provides accurate symbol information through LSP

🛠️ Exposed MCP Tools

Tool	Description
`get_hover`	Get hover information for symbols
`get_definition`	Find symbol definitions
`get_completions`	Get intelligent code completions
`get_references`	Find all references to a symbol
`rename_symbol`	Rename symbols across files

📋 Configuration

Key	Description	Type	Default
`lsp-mcp.enabled`	Enable or disable the LSP MCP server.	`boolean`	`true`
`lsp-mcp.port`	Port for the LSP MCP server.	`number`	`9527`
`lsp-mcp.maxRetries`	Maximum number of port retry attempts when the default port is occupied.	`number`	`10`

🔗 Integration with AI Tools

Cursor

{
  "mcpServers": {
    "lsp": {
      "url": "http://127.0.0.1:9527/mcp"
    }
  }
}

Roo Code

{
  "mcpServers": {
    "lsp": {
      "type": "streamable-http",
      "url": "http://127.0.0.1:9527/mcp",
      "disabled": false
    }
  }
}

💻 Development

Clone the repository
Run pnpm install
Run pnpm run update to generate metadata
Press F5 to start debugging

VSCode LSP MCP Server

README Documentation