Js Sandbox Mcp Server
What is Js Sandbox Mcp Server
js-sandbox-mcp-server is a Model Context Protocol server that provides a secure environment for executing JavaScript code in isolation.
Use cases
Use cases include executing user-submitted JavaScript code safely, running automated tests in a controlled environment, and developing applications that require dynamic code execution.
How to use
To use js-sandbox-mcp-server, install the dependencies using ‘npm install’, build the server with ‘npm run build’, and configure it in the Claude Desktop application by adding the server path in the configuration file.
Key features
Key features include isolated JavaScript code execution, configurable execution time and memory limits, and protection against malicious code.
Where to use
js-sandbox-mcp-server can be used in web applications, server-side scripting, and any environment where secure JavaScript execution is required.
Clients Supporting MCP
The following are the main client software that supports the Model Context Protocol. Click the link to visit the official website for more information.
Overview
What is Js Sandbox Mcp Server
js-sandbox-mcp-server is a Model Context Protocol server that provides a secure environment for executing JavaScript code in isolation.
Use cases
Use cases include executing user-submitted JavaScript code safely, running automated tests in a controlled environment, and developing applications that require dynamic code execution.
How to use
To use js-sandbox-mcp-server, install the dependencies using ‘npm install’, build the server with ‘npm run build’, and configure it in the Claude Desktop application by adding the server path in the configuration file.
Key features
Key features include isolated JavaScript code execution, configurable execution time and memory limits, and protection against malicious code.
Where to use
js-sandbox-mcp-server can be used in web applications, server-side scripting, and any environment where secure JavaScript execution is required.
Clients Supporting MCP
The following are the main client software that supports the Model Context Protocol. Click the link to visit the official website for more information.
Content
js-sandbox MCP Server
A Model Context Protocol server that provides a secure JavaScript execution environment.
Features
Tools
execute_js- Executes JavaScript code in an isolated environment- Parameters:
code(required): JavaScript code to executetimeout(optional): Maximum execution time in milliseconds (100-30000ms)memory(optional): Memory limit in bytes (1MB-100MB)
- Returns the result of code execution
- Parameters:
Security
- Isolated code execution in a controlled environment
- Configurable execution time and memory limits
- Protection against malicious code
Development
Install dependencies:
npm install
Build the server:
npm run build
Development mode with auto-rebuild:
npm run watch
Installation
Installing via Smithery
To install JavaScript Sandbox Server for Claude Desktop automatically via Smithery:
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
{
"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, which is available as:
npm run inspector
The Inspector will provide a URL to access debugging tools in your browser.
Dev Tools Supporting MCP
The following are the main code editors that support the Model Context Protocol. Click the link to visit the official website for more information.
