VSC as MCP

A Visual Studio Code extension that exposes an MCP (Model Context Protocol) server, giving AI tools like Claude, Cursor, and others direct access to VS Code's semantic code understanding capabilities - go-to-definition, find references, completions, diagnostics, and so much more!

✨ Features

• 🧠 Full Language Intelligence - Access VS Code's language server features via MCP tools

• 📁 Workspace Aware - Works on individual files or full project contexts

• 🔗 URI Protocol Handler - Launch VS Code via vscode://codingwithcalvin.mcp/...

• ⚡ Auto-start - MCP server starts automatically when VS Code launches

• 🔒 Secure by Default - Binds only to localhost, no external access

🛠️ Available Tools

📦 Installation

VS Code Marketplace

1. Open VS Code

2. Go to Extensions (Ctrl+Shift+X)

3. Search for "VSC as MCP"

4. Click Install 🎉

Manual Installation

Download the latest .vsix from the Releases page:

code --install-extension CodingWithCalvin.VSC-MCPServer.vsix

🚀 Usage

The MCP server starts automatically when VS Code launches! Just configure your AI tool to connect:

🤖 MCP Configuration

Add to your MCP client configuration:

{
  "mcpServers": {
    "vscode": {
      "url": "http://localhost:4000/mcp",
      "description": "VS Code semantic code navigation"
    }
  }
}

🔗 URI Protocol

Launch VS Code and control the MCP server via URI:

vscode://codingwithcalvin.mcp/start                     # Start MCP server
vscode://codingwithcalvin.mcp/start?port=4000           # Start on specific port
vscode://codingwithcalvin.mcp/open?folder=/path/to/dir  # Open folder and start

⚙️ Configuration

💻 Commands

Access these from the Command Palette (Ctrl+Shift+P):

• ▶️ MCP Server: Start - Start the MCP server

• ⏹️ MCP Server: Stop - Stop the MCP server

• 🔄 MCP Server: Restart - Restart the MCP server

• 📋 MCP Server: Show Available Tools - View all available MCP tools

🔒 Security

• 🏠 Localhost Only - Binds only to 127.0.0.1

• 🛡️ DNS Rebinding Protection - Validates Host header

• ✅ Same-machine Trusted - No authentication required for local access

📋 Requirements

• 💻 Visual Studio Code 1.85.0 or later

• 🟢 Node.js (bundled with VS Code)

🤝 Contributing

Contributions are welcome! Whether it's bug reports, feature requests, or pull requests - all feedback helps make this extension better.

🔧 Development Setup

1. Clone the repository

2. Run npm install

3. Run npm run build

4. Press F5 to launch the Extension Development Host 🎉

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

👥 Contributors