<img src="./img/ha.png" height="30" style="border-radius: 250%; margin: 0 5px;"> 🤝 <img src="./img/mcp.png" height="30" style="border-radius: 20%; margin: 0 5px;"> Home Assistant MCP Server

A Model Context Protocol (MCP) server project that integrates with Home Assistant to provide smart home control capabilities.

Prompts

The server provides prompts for each domain's set of tools.

Tools

The server implements control for various Home Assistant domains. Currently supports:

💡 Lights: Turn on/off, brightness control
🌡️ Climate: Temperature control, HVAC modes
🔒 Locks: Lock/unlock functionality
🚨 Alarm Control Panel: Arm/disarm security systems
💧 Humidifier: Humidity control

Example tools include:

light-turn_on()
climate-turn_off()
alarm_control_panel-disarm()
lock-lock()
humidifier-turn_off()

Configuration

Environment Variables

Create a .env file in the root directory with:

HOMEASSISTANT_TOKEN=your_long_lived_access_token_here # get it from your Home Assistant instance after onboarding
HOMEASSISTANT_BASE_URL=your_home_assistant_url_here # e.g. http://homeassistant.local:8123

Quickstart

Install

Follow the instructions on how to install Home Assistant and get a long lived access token.

Home Assistant Getting Started

Claude Desktop

On MacOS: ~/Library/Application\ Support/Claude/claude_desktop_config.json On Windows: %APPDATA%/Claude/claude_desktop_config.json

<details> <summary>Development/Unpublished Servers Configuration</summary> ``` "mcpServers": { "home-assistant-server": { "command": "uv", "args": [ "--directory", "/path/to/home-assistant-server", "run", "home-assistant-server" ] } } ``` </details> <details> <summary>Published Servers Configuration</summary> ``` "mcpServers": { "home-assistant-server": { "command": "uvx", "args": [ "home-assistant-server" ] } } ``` </details>

Development

Building and Publishing

To prepare the package for distribution:

Sync dependencies and update lockfile:

uv sync

Build package distributions:

uv build

This will create source and wheel distributions in the dist/ directory.

Publish to PyPI:

uv publish

Note: You'll need to set PyPI credentials via environment variables or command flags:

Token: --token or UV_PUBLISH_TOKEN
Or username/password: --username/UV_PUBLISH_USERNAME and --password/UV_PUBLISH_PASSWORD

Debugging

Since MCP servers run over stdio, debugging can be challenging. For the best debugging experience, we strongly recommend using the MCP Inspector.

You can launch the MCP Inspector via npm with this command:

npx @modelcontextprotocol/inspector uv --directory /Users/miguel/Documents/home-assistant-server/home-assistant-server run home-assistant-server

Upon launching, the Inspector will display a URL that you can access in your browser to begin debugging.

Contributing

Please see CONTRIBUTING.md for guidelines.

License

MIT License - see LICENSE for details.