WAGO PLC MCP Server

What the code does

We read the source, 18 h ago · rules 3dff92dd89df

Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.

    r = subprocess.run(

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    r = subprocess.run(

    container_name: wago-fwupdate
    network_mode: host
    environment:
      PLC_IP: ${PLC_IP}

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add wago-plc-mcp-server -- uvx wago-plc-mcp-server

{
  "mcpServers": {
    "wago-plc-mcp-server": {
      "args": [
        "wago-plc-mcp-server"
      ],
      "command": "uvx"
    }
  }
}

[mcp_servers.wago-plc-mcp-server]
command = "uvx"
args = ["wago-plc-mcp-server"]

{
  "mcpServers": {
    "wago-plc-mcp-server": {
      "args": [
        "wago-plc-mcp-server"
      ],
      "command": "uvx"
    }
  }
}

{
  "mcpServers": {
    "wago-plc-mcp-server": {
      "args": [
        "wago-plc-mcp-server"
      ],
      "command": "uvx"
    }
  }
}

This one needs environment variables set before it will start: TRANSPORT (MCP transport. Fixed to stdio for this package.), WAGO_PLC_HOSTS (Comma-separated IPs of the WAGO PLCs, reachable from this machine), DEFAULT_PLC_USERNAME (WBM username on the PLCs), DEFAULT_PLC_PASSWORD (WBM password, same on all listed PLCs), WAGO_TIMEOUT_SECONDS (WDA request timeout. CC100 needs 45 or more, other controllers work with 15), WAGO_ALLOW_WRITES (true lets the agent change parameters, run methods and upload files. Anything else keeps every PLC read-only), AUDIT_LOG_FILE (Optional path for the tamper-evident audit log of writes and refusals). The author declared them in the registry entry; get the values from the project itself.