WinCC Unified MCP XT
About
An MCP server for interfacing with SIEMENS WinCC Unified SCADA systems via their GraphQL API.
Details
- Author
- mrwan84
- Categories
- Developer Tools, API, Other, Infrastructure
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Setup
Install WinCC Unified MCP XT in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/mrwan84/-WinCC-Unified-MCP-XT
Follow the installation instructions in the repository README, then restart your MCP client.
AModel Context Protocol (MCP)server designed to interface withSIEMENS WinCC Unified SCADA systemsvia theirGraphQL API. This server exposes various WinCC Unified functionalities as MCP tools, enabling AI assistants and other MCP-compatible clients to interact programmatically with the SCADA system.
This project is based on the repository byAndreas Vogler
- Connects to a WinCC Unified GraphQL endpoint.
- Provides MCP tools for:
- ✅ User authentication (login-user)
- 📂 Browsing SCADA objects (browse-objects)
- 📊 Reading current tag values (get-tag-values)
- 🕒 Querying historical/logged tag data (get-logged-tag-values)
- 🚨 Fetching active alarms (get-active-alarms)
- 📁 Fetching logged alarms (get-logged-alarms)
- ✍️ Writing values to tags (write-tag-values)
- 🟢 Acknowledging alarms (acknowledge-alarms)
- 🔄 Resetting alarms (reset-alarms)
this server uses aconfig.jsfile written in ES module syntax.
export const config = { URL: "https://your-wincc-server.example.com/graphql", // required userName: "service_account_username", // optional pwr: "service_account_password", // optional };
To use this MCP server with Claude AI (desktop version):
-
Find or create the claude_desktop_config.json file (typically in the Claude app config folder).
{ "mcpServers": { "WinCC Unified": { "command": "npx", "args": ["mcp-remote", "http://localhost:3000/mcp"] } } }
- Ensure @modelcontextprotocol/tools is installed:
npm install -g @modelcontextprotocol/tools
-
If configured, a service account is automatically logged in and token refreshed every minute.
A user's manual login overrides the service session temporarily.
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