JavaScript Sandbox MCP Server

[](https://mseep.ai/app/garc33-js-sandbox-mcp-server) # js-sandbox MCP Server [](https://smithery.ai/server/@garc33/js-sandbox-mcp-server) A Model Context Protocol server that provides a secure JavaScript execution environment. <a href="https://glama.ai/mcp/servers/agatnhlgki"> <img width="380" height="200" src="https://glama.ai/mcp/servers/agatnhlgki/badge" alt="JavaScript Sandbox Server MCP server" /> </a> ## Features ### Tools - `execute_js` - Executes JavaScript code in an isolated environment - Parameters: - `code` (required): JavaScript code to execute - `timeout` (optional): Maximum execution time in milliseconds (100-30000ms) - `memory` (optional): Memory limit in bytes (1MB-100MB) - Returns the result of code execution ### Security - Isolated code execution in a controlled environment - Configurable execution time and memory limits - Protection against malicious code ## Development Install dependencies: ```bash npm install ``` Build the server: ```bash npm run build ``` Development mode with auto-rebuild: ```bash npm run watch ``` ## Installation ### Installing via Smithery To install JavaScript Sandbox Server for Claude Desktop automatically via [Smithery](https://smithery.ai/server/@garc33/js-sandbox-mcp-server): ```bash npx -y @smithery/cli install @garc33/js-sandbox-mcp-server --client claude ``` To use with Claude Desktop, add the server configuration: MacOS: `~/Library/Application Support/Claude/claude_desktop_config.json` Windows: `%APPDATA%/Claude/claude_desktop_config.json` ```json { "mcpServers": { "js-sandbox": { "command": "/path/to/js-sandbox/build/index.js" } } } ``` ### Debugging Since MCP servers communicate over stdio, debugging can be challenging. We recommend using [MCP Inspector](https://github.com/modelcontextprotocol/inspector), which is available as: ```bash npm run inspector ``` The Inspector will provide a URL to access debugging tools in your browser.