# Weishaupt WEM Portal MCP Server
**Control and monitor your Weishaupt heating system with AI assistants via the WEM Portal**
[](https://github.com/Disane87/weishaupt-wem-mcp-server/releases)
[](https://www.npmjs.com/package/@disane-dev/weishaupt-wem-mcp-server)
[](https://opensource.org/licenses/MIT)
[](https://blog.disane.dev)
[](https://disane.dev)
[](https://modelcontextprotocol.io)
[](https://www.typescriptlang.org/)
[](https://nodejs.org/)
[](https://github.com/semantic-release/semantic-release)
---
## Features
- **Device Discovery** - List all devices and modules from your WEM Portal account
- **Live Parameters** - Read temperatures, pressure, operating modes with current values
- **Full Overview** - Get a complete snapshot of your entire heating system in one call
- **Write Parameters** - Adjust target temperatures, operating modes, schedules
- **Device Status** - Check connection status of your devices
- **Writable Filter** - List only the parameters you can actually change
- **Session Management** - Automatic cookie-based auth with login lock for concurrent requests
---
## Quick Start
### Install via npx (recommended)
No installation needed. Configure your MCP client to run:
```bash
npx @disane-dev/weishaupt-wem-mcp-server
```
### Install from source
```bash
git clone https://github.com/Disane87/weishaupt-wem-mcp-server.git
cd weishaupt-wem-mcp-server
npm install
npm run build
```
---
## Configuration
Claude Desktop
Add to your Claude Desktop config:
- **Windows:** `%APPDATA%\Claude\claude_desktop_config.json`
- **macOS:** `~/Library/Application Support/Claude/claude_desktop_config.json`
```json
{
"mcpServers": {
"weishaupt-wem": {
"command": "npx",
"args": ["-y", "@disane-dev/weishaupt-wem-mcp-server"],
"env": {
"WEM_USERNAME": "your_email@example.com",
"WEM_PASSWORD": "your_password"
}
}
}
}
```
Claude Code
```bash
claude mcp add weishaupt-wem -- npx -y @disane-dev/weishaupt-wem-mcp-server
```
Set the environment variables `WEM_USERNAME` and `WEM_PASSWORD` before starting.
From source
```json
{
"mcpServers": {
"weishaupt-wem": {
"command": "node",
"args": ["/path/to/wem-mcp/build/index.js"],
"env": {
"WEM_USERNAME": "your_email@example.com",
"WEM_PASSWORD": "your_password"
}
}
}
}
```
### Environment Variables
| Variable | Required | Description |
|---|---|---|
| `WEM_USERNAME` | Yes | Your WEM Portal email |
| `WEM_PASSWORD` | Yes | Your WEM Portal password |
| `WEM_API_URL` | No | API base URL (default: `https://www.wemportal.com/app`) |
---
## Available Tools
| Tool | Description |
|---|---|
| `wem_get_devices` | List all devices with modules. **Call this first** to discover IDs. |
| `wem_get_device_status` | Get connection status of a device |
| `wem_get_overview` | Full device overview: all modules with all parameters in one call |
| `wem_get_parameters` | Get all parameters of a module with current values |
| `wem_get_parameter_meta` | Get parameter metadata (names, min/max, enums, writable flag) |
| `wem_get_writable_parameters` | List only adjustable parameters with ranges and options |
| `wem_read_parameters` | Read specific parameter values by ID |
| `wem_write_parameter` | Set a parameter value (e.g., target temperature) |
> [!TIP]
> Start with `wem_get_devices` to discover your `deviceId`, `moduleIndex`, and `moduleType`, then use `wem_get_overview` for a complete snapshot of your heating system.
---
## Typical Workflow
```
1. wem_get_devices
-> Returns devices with modules (WE0=heat generator, HZK0=heating circuit, WW0=hot water)
2. wem_get_overview (deviceId)
-> Returns ALL modules with ALL parameters in one call
3. wem_get_writable_parameters (deviceId, moduleIndex, moduleType)
-> Shows what you can adjust, with min/max ranges
4. wem_write_parameter (deviceId, moduleIndex, moduleType, parameterId, numericValue)
-> Sets a writable parameter (e.g. target temperature)
```
### Common Module Types
| Type | Name | Description |
|---|---|---|
| 1 | SYSTEM | System overview |
| 2 | HZK | Heating circuit (temperatures, operating mode) |
| 3 | WW | Hot water (temperature, push, schedule) |
| 5 | TERMINAL | Control panel |
| 6 | GATEWAY | Communication gateway |
| 7 | WE | Heat generator (boiler/heat pump performance) |
| 9 | Device | Physical device unit |
| 10 | GROUND | Ground module |
---
## Development
| Command | Description |
|---|---|
| `npm run build` | Build the project |
| `npm run watch` | Watch mode (auto-rebuild on changes) |
| `npm start` | Run server directly |
| `npm test` | Test API connection |
| `npm run inspector` | Official MCP Inspector (Web UI) |
| `npm run inspector:cli -- devices` | CLI inspector for quick API tests |
---
## Troubleshooting
> [!NOTE]
> Make sure you can log in at [wemportal.com](https://www.wemportal.com/) before using this server.
| Issue | Solution |
|---|---|
| Authentication failed | Verify credentials, check if WEM Portal blocks after too many attempts |
| Connection timeout | Check internet, WEM Portal may be temporarily unavailable (30s default timeout) |
| Parameter values show 0 | Some parameters (e.g. room temperature) require a physical sensor connected to the device |
---
## Contributing
Contributions are welcome! Please open an issue or submit a pull request.
---
## License
MIT - see [LICENSE](LICENSE)
---
**[disane.dev](https://disane.dev)** | **[Blog](https://blog.disane.dev)** | **[GitHub](https://github.com/Disane87)** | **[npm](https://www.npmjs.com/package/@disane-dev/weishaupt-wem-mcp-server)**