MCP SiftCurated directory

Code Runner MCP Server

by formulahendry

MCP Server for running code snippets and showing the result. Supports multiple programming languages including JavaScript, PHP, Python, Perl, Ruby, Go, Lua, and many more. Requires interpreters or compilers of the target languages to be set in the PATH environment variable.

Developer toolsstdio or Streamable HTTPCommunity

Repository-wide counts · Cached 2025-10-28

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Overview

The Code Runner MCP Server MCP server is a publicly available project. Review the upstream repository for installation instructions, supported tools, compatibility, permissions, and current maintenance status.

Configuration

Configuration, transport, authentication, and runtime requirements vary by project. Open the repository before connecting and use the smallest set of credentials and permissions required.

Open the Code Runner MCP Server repository to read the latest documentation.

KEEP EXPLORING

Compare source, connection, and authentication details before choosing an implementation.

View the complete category

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FROM THE SOURCE

Repository README

Build-time snapshot · Retrieved 2026-10-05

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Code Runner MCP Server

NPM Downloads smithery badge Docker Pulls

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.

mcp-server-code-runner MCP server

Setup

npx for VS Code

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

Install in VS Code Install in VS Code Insiders

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:

Install in VS Code Install in VS Code Insiders

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

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