README.md•4.54 kB
# Home Assistant MCP
[](https://smithery.ai/server/@hpohlmann/home-assistant-mcp)
A Model Context Protocol (MCP) integration for controlling Home Assistant devices using AI assistants.
<a href="https://glama.ai/mcp/servers/@hpohlmann/home-assistant-mcp">
<img width="380" height="200" src="https://glama.ai/mcp/servers/@hpohlmann/home-assistant-mcp/badge" alt="Home Assistant MCP server" />
</a>
## Overview
This MCP allows AI assistants to control your Home Assistant devices. It provides tools to:
1. Search for entities in your Home Assistant instance
2. Control devices (turn them on/off)
3. Control light colors and brightness
## Prerequisites
- Python 3.11 or higher
- Home Assistant instance running and accessible via API
- Home Assistant Long-Lived Access Token
## Installation
### Installing via Smithery
To install Home Assistant Integration for Claude Desktop automatically via [Smithery](https://smithery.ai/server/@hpohlmann/home-assistant-mcp):
```bash
npx -y @smithery/cli install @hpohlmann/home-assistant-mcp --client claude
```
### Manual Installation
1. Clone this repository
2. Set up a Python environment:
```bash
cd home-assistant
python -m venv .venv
source .venv/bin/activate # On Windows: .venv\Scripts\activate
pip install -U pip
pip install uv
uv pip install -e .
```
## Configuration
### Get a Home Assistant Long-Lived Access Token
1. Go to your Home Assistant instance
2. Navigate to your profile (click on your username in the sidebar)
3. Scroll down to "Long-Lived Access Tokens"
4. Create a new token with a descriptive name like "MCP Integration"
5. Copy the token (you'll only see it once)
### Set up in Cursor AI
Add the following configuration to your MCP configuration in Cursor:
```json
{
"mcpServers": {
"home_assistant": {
"command": "uv",
"args": [
"--directory",
"/path/to/your/home-assistant-mcp",
"run",
"main.py"
],
"env": {
"HOME_ASSISTANT_TOKEN": "your_home_assistant_token_here"
},
"inheritEnv": true
}
}
}
```
Replace:
- `/path/to/your/home-assistant` with the actual path to this directory
- `your_home_assistant_token_here` with your Home Assistant Long-Lived Access Token
### Home Assistant URL Configuration
By default, the MCP tries to connect to Home Assistant at `http://homeassistant.local:8123`.
If your Home Assistant is at a different URL, you can modify the `HA_URL` variable in `app/config.py`.
## Usage
Once configured, you can use Cursor AI to control your Home Assistant devices:
- Search for devices: "Find my living room lights"
- Control devices: "Turn on the kitchen light"
- Control light colors: "Set my living room lights to red"
- Adjust brightness: "Set my dining room lights to blue at 50% brightness"
### Light Control Features
The MCP now supports advanced light control capabilities:
1. **Color Control**: Set any RGB color for compatible lights
- Specify colors using RGB values (0-255 for each component)
- Example: `set_device_color("light.living_room", 255, 0, 0)` for red
2. **Brightness Control**: Adjust light brightness
- Optional brightness parameter (0-255)
- Can be combined with color changes
- Example: `set_device_color("light.dining_room", 0, 0, 255, brightness=128)` for medium-bright blue
## Troubleshooting
- If you get authentication errors, verify your token is correct and has not expired
- Check that your Home Assistant instance is reachable at the configured URL
- For color control issues:
- Verify that your light entity supports RGB color control
- Check that the light is turned on before attempting to change colors
## Future Capabilities
### Dynamic Entity Exposure
The current implementation requires a two-step process to control devices:
1. Search for entities using natural language
2. Control the entity using its specific entity_id
A planned enhancement is to create a more dynamic way to expose entities to the control devices tool, allowing the AI to:
- Directly control devices through more natural commands (e.g., "turn off the kitchen lights")
- Cache frequently used entities for faster access
- Support more complex operations like adjusting brightness, temperature, or other attributes
- Handle entity groups and scenes more intuitively
This would significantly reduce the time to action and create a more seamless user experience when controlling Home Assistant devices through an AI assistant.