Home Assistant
Home Assistant MCP Server - Control your smart home with AI assistants via the Model Context Protocol
What is Home Assistant?
Home Assistant is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to home assistant mcp server - control your smart home with ai assistants via the model context protocol
Home Assistant MCP Server - Control your smart home with AI assistants via the Model Context Protocol
This server falls under the Business Applications category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- Home Assistant MCP Server - Control your smart home with AI
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx homeassistantConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Home Assistant
The homeassistant-mcp server connects AI assistants to your Home Assistant smart home instance via the Model Context Protocol, enabling natural language control over lights, climate, media players, locks, vacuums, and more. It supports real-time state updates via Server-Sent Events, automation management, add-on lifecycle operations, and HACS package management. Developers and home automation enthusiasts use it to script complex routines or control their home through conversational AI without writing manual API calls.
Prerequisites
- Node.js 18+ or Docker and Docker Compose installed
- A running Home Assistant instance accessible on your network
- A Home Assistant long-lived access token (Profile > Security > Long-lived access tokens)
- An MCP-compatible client such as Claude Desktop
Clone the repository
Clone the homeassistant-mcp repository to your local machine and navigate into it.
git clone https://github.com/tevonsb/homeassistant-mcp.git
cd homeassistant-mcpConfigure environment variables
Copy the example environment file and fill in your Home Assistant URL, long-lived access token, and WebSocket URL. These are required for the server to authenticate and communicate with your Home Assistant instance.
cp .env.example .env
# Edit .env and set:
# HASS_HOST=http://homeassistant.local:8123
# HASS_TOKEN=your_long_lived_token
# HASS_SOCKET_URL=ws://homeassistant.local:8123/api/websocket
# PORT=3000Install dependencies and build
Install Node.js dependencies and compile the TypeScript source to the dist directory.
npm install
npm run buildStart with Docker (recommended)
Use Docker Compose to start the server in a containerized environment. This is the recommended approach for stable deployments.
docker compose up -dConfigure your MCP client
Add the server to your claude_desktop_config.json (or equivalent MCP client config), pointing to the compiled dist directory and supplying environment credentials.
Home Assistant Examples
Client configuration
Add this block to your claude_desktop_config.json. Replace the path, token, and host values with your actual setup. The server requires HASS_HOST, HASS_TOKEN, and HASS_SOCKET_URL at minimum.
{
"mcpServers": {
"homeassistant": {
"command": "node",
"args": ["/path/to/homeassistant-mcp/dist/index.js"],
"env": {
"HASS_HOST": "http://homeassistant.local:8123",
"HASS_TOKEN": "your_long_lived_access_token",
"HASS_SOCKET_URL": "ws://homeassistant.local:8123/api/websocket",
"PORT": "3000",
"NODE_ENV": "production"
}
}
}
}Prompts to try
After connecting, use these prompts to control your smart home through your AI assistant.
- "Turn on the living room lights and set brightness to 50%."
- "What is the current temperature in the bedroom?"
- "Create an automation that turns off all lights at midnight."
- "List all installed Home Assistant add-ons and their status."
- "Lock the front door and check its current state."Troubleshooting Home Assistant
Connection refused or ECONNREFUSED error
Verify that HASS_HOST points to the correct IP or hostname of your Home Assistant instance and that port 8123 is accessible from the machine running the MCP server. Check that Home Assistant is running.
401 Unauthorized when calling tools
Regenerate your long-lived access token from Home Assistant Profile > Security > Long-lived access tokens. Make sure the token is copied completely without trailing whitespace in your .env file.
WebSocket disconnects frequently
Set HASS_SOCKET_URL to use the same host as HASS_HOST. If you're behind a reverse proxy, ensure WebSocket upgrade headers are passed through. Setting DEBUG=true in .env shows detailed connection logs.
Frequently Asked Questions about Home Assistant
What is Home Assistant?
Home Assistant is a Model Context Protocol (MCP) server that home assistant mcp server - control your smart home with ai assistants via the model context protocol It connects AI assistants to external tools and data sources through a standardized interface.
How do I install Home Assistant?
Follow the installation instructions on the Home Assistant GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with Home Assistant?
Home Assistant works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is Home Assistant free to use?
Yes, Home Assistant is open source and available under the Apache 2.0 license. You can use it freely in both personal and commercial projects.
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