OPC-UA MCP Server

by mwieczorkiewiczio.github.mwieczorkiewicz/opcua-mcpv1.0.0

Read, write, browse, search, and subscribe to live data on an OPC-UA industrial automation server.

5Dockerstdioofficial registry

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Maintained2mo ago

Install OPC-UA MCP server

claude mcp add opcua -e OPCUA_ENDPOINT=opc.tcp://localhost:4840 -e OPCUA_PASSWORD='<opcua-password>' -- docker run -i --rm -e OPCUA_ENDPOINT -e OPCUA_PASSWORD ghcr.io/mwieczorkiewicz/opcua-mcp:main-29734c4

{
  "mcpServers": {
    "opcua": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "OPCUA_ENDPOINT",
        "-e",
        "OPCUA_PASSWORD",
        "ghcr.io/mwieczorkiewicz/opcua-mcp:main-29734c4"
      ],
      "env": {
        "OPCUA_ENDPOINT": "opc.tcp://localhost:4840",
        "OPCUA_PASSWORD": "<opcua-password>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "opcua": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "OPCUA_ENDPOINT",
        "-e",
        "OPCUA_PASSWORD",
        "ghcr.io/mwieczorkiewicz/opcua-mcp:main-29734c4"
      ],
      "env": {
        "OPCUA_ENDPOINT": "opc.tcp://localhost:4840",
        "OPCUA_PASSWORD": "<opcua-password>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "opcua": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "OPCUA_ENDPOINT",
        "-e",
        "OPCUA_PASSWORD",
        "ghcr.io/mwieczorkiewicz/opcua-mcp:main-29734c4"
      ],
      "env": {
        "OPCUA_ENDPOINT": "opc.tcp://localhost:4840",
        "OPCUA_PASSWORD": "<opcua-password>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "opcua": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "OPCUA_ENDPOINT",
        "-e",
        "OPCUA_PASSWORD",
        "ghcr.io/mwieczorkiewicz/opcua-mcp:main-29734c4"
      ],
      "env": {
        "OPCUA_ENDPOINT": "opc.tcp://localhost:4840",
        "OPCUA_PASSWORD": "<opcua-password>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
OPCUA_ENDPOINT	yes	—	OPC-UA server endpoint to connect to, e.g. opc.tcp://your-plc-host:4840
OPCUA_AUTH_MODE	—	—	Authentication mode against the OPC-UA server
OPCUA_USERNAME	—	—	Username, required if OPCUA_AUTH_MODE=username
OPCUA_PASSWORD	—	yes	Password, required if OPCUA_AUTH_MODE=username
OPCUA_SECURITY_POLICY	—	—	OPC-UA transport security policy, e.g. Basic256Sha256
OPCUA_SECURITY_MODE	—	—	OPC-UA transport security mode, e.g. SignAndEncrypt
SERVER_TRANSPORT	—	—	MCP transport: stdio (for local MCP clients) or http (for remote/hosted deployments)

Freshness

Maintained — last maintenance signal 2mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-08-05 · 2mo ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-08-05 · 2mo ago · official registry · v1.0.0

FAQ

›How do I install the OPC-UA MCP server in Claude Code?

Run: claude mcp add opcua -e OPCUA_ENDPOINT=opc.tcp://localhost:4840 -e OPCUA_PASSWORD='<opcua-password>' -- docker run -i --rm -e OPCUA_ENDPOINT -e OPCUA_PASSWORD ghcr.io/mwieczorkiewicz/opcua-mcp:main-29734c4. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does OPC-UA require an API key?

Yes. It expects OPCUA_ENDPOINT, OPCUA_PASSWORD, of which 1 is a secret.

›Can I use OPC-UA as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is OPC-UA in the official MCP registry?

Yes, as io.github.mwieczorkiewicz/opcua-mcp.