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mcp-server-code-runner

by formulahendry
npmGitHub
TypeScript
MIT License
154
130
  • Apple
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Code Runner MCP Server

MCP Server for running code snippet and show the result.

It supports running multiple programming languages: JavaScript, PHP, Python, Perl, Perl 6, Ruby, Go, Lua, Groovy, PowerShell, BAT/CMD, BASH/SH, F# Script, C# Script, VBScript, TypeScript, CoffeeScript, Scala, Swift, Julia, Crystal, OCaml Script, R, AppleScript, Elixir, Clojure, Racket, Scheme, AutoHotkey, AutoIt, Kotlin Script, Dart, Haskell, Ni, Lisp, Kit, V, SCSS, Sass. Full list could be seen here in constants.ts.

Setup

npx for VS Code

Install the Code Runner MCP server in VS Code using below buttons:

Alternatively, you can add configuration in settings.json:

{ "mcp": { "inputs": [], "servers": { "mcp-server-code-runner": { "command": "npx", "args": [ "-y", "mcp-server-code-runner@latest" ], } } } }

npx for Claude Desktop

Configuration in claude_desktop_config.json:

{ "mcpServers": { "mcp-server-code-runner": { "command": "npx", "args": [ "-y", "mcp-server-code-runner@latest" ], } } }

Docker

Use VS Code as example. Install the Code Runner MCP server in VS Code using below buttons:

Alternatively, you can add configuration in settings.json:

{ "mcp": { "inputs": [], "servers": { "mcp-server-code-runner": { "command": "docker", "args": [ "run", "--rm", "-i", "formulahendry/mcp-server-code-runner" ] } } } }

npx issue on Widnows

On Windows, MCP servers may fail to connect with npx.

You could try below two workarounds:

use bunx
  1. Install Bun.
  2. In configuration, change npx with bunx.
use cmd

Below is VS Code configuration in settings.json:

{ "mcp": { "inputs": [], "servers": { "mcp-server-code-runner": { "command": "cmd", "args": [ "/c", "npx", "-y", "mcp-server-code-runner@latest" ], } } } }

Run with Streamable HTTP Transport

npm install -g mcp-server-code-runner@latest mcp-server-code-runner --transport http

Usage

Before using Code Runner MCP Server, please make sure interpreter or compiler of the programming language you want to run is set in PATH environment variable.

Try below prompts in the application which has configured Code Runner MCP Server:

  • Run the JavaScript Code: console.log(5+6)
  • Where is temporary folder in my OS? Use run-code tool
  • How many CPUs do I have in my machine? Use run-code tool

Build your own MCP Server

Want to build your own MCP Server? Try Yeoman Generator for MCP Server to create your MCP Server project!

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A
security – no known vulnerabilities
A
license - permissive license
A
quality - confirmed to work

local-only server

The server can only run on the client's local machine because it depends on local resources.

Tools

MCP Server for running code snippet and show the result.

  1. Setup
    1. npx for VS Code
    2. npx for Claude Desktop
    3. Docker
    4. npx issue on Widnows
  2. Run with Streamable HTTP Transport
    1. Usage
      1. Build your own MCP Server

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