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io.github.efranceschetti/festo-codesys-mcp

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MCP server for Festo/CODESYS PLCs: IEC 61131-3 ST + validated PLCopen XML generation.

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package festo-codesys-mcp
Claude Code 
claude mcp add festo-codesys-mcp -e 'FESTO_MCP_CODESYS_PATH=<FESTO_MCP_CODESYS_PATH>' -e 'FESTO_MCP_CODESYS_PROFILE=<FESTO_MCP_CODESYS_PROFILE>' -e 'FESTO_MCP_PYTHON=<FESTO_MCP_PYTHON>' -e 'FESTO_MCP_ENABLE_HARDWARE=<FESTO_MCP_ENABLE_HARDWARE>' -e 'FESTO_MCP_ALLOW_OUTSIDE_WORKSPACE=<FESTO_MCP_ALLOW_OUTSIDE_WORKSPACE>' -- npx -y festo-codesys-mcp@1.0.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "festo-codesys-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "festo-codesys-mcp@1.0.1"
            ],
            "env": {
                "FESTO_MCP_CODESYS_PATH": "<FESTO_MCP_CODESYS_PATH>",
                "FESTO_MCP_CODESYS_PROFILE": "<FESTO_MCP_CODESYS_PROFILE>",
                "FESTO_MCP_PYTHON": "<FESTO_MCP_PYTHON>",
                "FESTO_MCP_ENABLE_HARDWARE": "<FESTO_MCP_ENABLE_HARDWARE>",
                "FESTO_MCP_ALLOW_OUTSIDE_WORKSPACE": "<FESTO_MCP_ALLOW_OUTSIDE_WORKSPACE>"
            }
        }
    }
}

Environment variables

  • FESTO_MCP_CODESYS_PATH Optional. Absolute path to CODESYS.exe — enables the 12 ide_* tools that drive a live CODESYS V3.5 instance (Windows only).
  • FESTO_MCP_CODESYS_PROFILE Required when using the ide_* tools. CODESYS profile name exactly as shown in the CODESYS version selector.
  • FESTO_MCP_PYTHON Optional. Python interpreter for the XSD/semantic validators and hardware tools (needs lxml).
  • FESTO_MCP_ENABLE_HARDWARE Optional. Set to 1 to enable the cpx_*/edcon_* hardware commissioning tools (bench use only).
  • FESTO_MCP_ALLOW_OUTSIDE_WORKSPACE Optional. Set to 1 to allow file-writing tools to write outside the workspace directory.

Frequently asked questions

What is io.github.efranceschetti/festo-codesys-mcp?

MCP server for Festo/CODESYS PLCs: IEC 61131-3 ST + validated PLCopen XML generation.

How do I install io.github.efranceschetti/festo-codesys-mcp?

It runs on your machine. In Claude Code: claude mcp add festo-codesys-mcp -e 'FESTO_MCP_CODESYS_PATH=<FESTO_MCP_CODESYS_PATH>' -e 'FESTO_MCP_CODESYS_PROFILE=<FESTO_MCP_CODESYS_PROFILE>' -e 'FESTO_MCP_PYTHON=<FESTO_MCP_PYTHON>' -e 'FESTO_MCP_ENABLE_HARDWARE=<FESTO_MCP_ENABLE_HARDWARE>' -e 'FESTO_MCP_ALLOW_OUTSIDE_WORKSPACE=<FESTO_MCP_ALLOW_OUTSIDE_WORKSPACE>' -- npx -y festo-codesys-mcp@1.0.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.efranceschetti/festo-codesys-mcp need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Who maintains io.github.efranceschetti/festo-codesys-mcp?

It is published by efranceschetti. AI.tn lists it but does not maintain or endorse it.

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