Code Runner MCP Server

Name: Code Runner MCP Server
Author: formulahendry

@formulahendry

Repository Homepage

About Code Runner MCP Server

Basic information

Config

Add this server to your MCP-compatible client using the configuration below.

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

Tools

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We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is Code Runner MCP Server?

Code Runner MCP Server is an MCP server that runs code snippets and displays the results. It supports multiple programming languages including JavaScript, Python, Ruby, Go, PHP, and many others. This server is for developers who want to execute code directly through MCP-compatible applications like VS Code or Claude Desktop.

How to use Code Runner MCP Server?

Install and configure the server via npx, Docker, or bunx in your MCP client's configuration file (e.g., settings.json for VS Code or claude_desktop_config.json for Claude Desktop). Ensure the interpreter or compiler for your desired language is set in the PATH environment variable, then use prompts like Run the JavaScript Code: console.log(5+6).

Key features of Code Runner MCP Server

Runs code snippets in 37+ programming languages
Supports setup via npx, Docker, or bunx
Offers Streamable HTTP Transport option
Returns execution output and results to the client
Works with VS Code, Claude Desktop, and other MCP hosts
Simple prompt-based usage with run-code tool

Use cases of Code Runner MCP Server

Execute ad-hoc code snippets without leaving your editor
Test small scripts or algorithms during development
Run system commands or retrieve OS information via code
Validate code logic before integrating into larger projects

FAQ from Code Runner MCP Server

What languages does Code Runner MCP Server support?

It supports 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, and Sass. The full list is in the source constants file.

What are the runtime requirements?

The interpreter or compiler for each programming language you want to run must be installed and available in your system's PATH environment variable.