Deno MCP Server

A Model Context Protocol (MCP) server for executing Deno TypeScript/JavaScript code. This server allows LLMs like Claude to run Deno code securely with configurable permissions.

Features

• Execute Deno TypeScript or JavaScript code
• Configure permissions (net, read, write, env, run, etc.)
• Enable/disable unstable features
• Get Deno version information

Prerequisites

Before using this MCP server, ensure you have:

• Node.js 16 or higher installed
• Deno installed
• Claude Desktop or Cline installed

Installation

1. Clone this repository:

git clone https://github.com/Timtech4u/deno-mcp.git
cd deno-mcp

2. Install dependencies:

npm install

3. Build the project:

npm run build

Configuration

For Claude Desktop

1. Open your Claude Desktop configuration file:

   • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
   • Windows: %APPDATA%\Claude\claude_desktop_config.json

2. Add the Deno MCP server configuration:

{
  "mcpServers": {
    "deno": {
      "command": "node",
      "args": [
        "/absolute/path/to/deno-mcp/dist/index.js"
      ],
      "disabled": false,
      "autoApprove": [
        "execute_deno_code",
        "check_deno_version"
      ]
    }
  }
}

3. Replace /absolute/path/to/deno-mcp with the actual path where you cloned the repository.

4. Restart Claude Desktop.

For Cline

1. Open your Cline MCP settings file:

   • macOS: ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
   • Windows: %APPDATA%\Code\User\globalStorage\saoudrizwan.claude-dev\settings\cline_mcp_settings.json

2. Add the Deno MCP server configuration:

{
  "mcpServers": {
    "deno": {
      "command": "node",
      "args": [
        "/absolute/path/to/deno-mcp/dist/index.js"
      ],
      "disabled": false,
      "autoApprove": [
        "execute_deno_code",
        "check_deno_version"
      ]
    }
  }
}

3. Replace /absolute/path/to/deno-mcp with the actual path where you cloned the repository.

4. Restart Cline or reload the window.

How to Use

Once configured, you can ask Claude to run Deno code in various ways. Here are some examples:

Basic Usage

You can run simple Deno code without any special permissions:

Can you run this Deno code for me?

console.log("Hello from Deno!");
console.log("Version:", Deno.version);
console.log("Current directory:", Deno.cwd());

With Network Permissions

To make HTTP requests, you need to grant network permissions:

Run this Deno code with network permissions:

async function fetchData() {
  const response = await fetch("https://jsonplaceholder.typicode.com/todos/1");
  const data = await response.json();
  console.log("Fetched data:", data);
}