CODESYS MCP Toolkit

MCP serverCommunity

A Node.js server that runs CODESYS scripting-engine commands to create POUs, set their code and compile the project. By johannesPettersson80.

129 starsUpdated 1 year agoGitHub data from 5 Nov 2026

At a glance

Type: MCP server
Works with: CODESYS
How it connects: Drives a running copy of the tool
Access: Can modify models
Tool versions: CODESYS V3 (tested with 3.5 SP21) with the Scripting Engine installed
Operating systems: Windows
Needs a CODESYS licence: Not stated in its documentation
Transport: Local (stdio)
AI clients documented: Claude Desktop
Licence: MIT
Language: TypeScript

What it can do

Opens, creates (from standard templates) and saves CODESYS projects.
Creates programs, function blocks and functions, sets their declaration and implementation code, and adds properties and methods to function blocks.
Compiles the project, and exposes the project structure and POU code as MCP resources.

Limitations

Not maintained since May 2025 (npm 1.1.16).
Launching through npx can fail inside Claude Desktop; the author recommends calling the installed command directly.
The @codesys npm scope is the author's own, not CODESYS Group's.

Install

npm install -g @codesys/mcp-toolkit

Source: github.com/johannesPettersson80/codesys-mcp-toolkit#-installation

{
  "mcpServers": {
    "codesys_local": {
      "command": "codesys-mcp-tool",
      "args": [
        "--codesys-path", "C:\\Program Files\\Path\\To\\Your\\CODESYS\\Common\\CODESYS.exe",
        "--codesys-profile", "Your CODESYS Profile Name"
      ]
    }
  }
}

Source: github.com/johannesPettersson80/codesys-mcp-toolkit#recommended-configuration-method-direct-command

MCP servers and skills run code on your computer. Review the source before installing.

AI-generated models, drawings and results must be checked by a qualified engineer before use.