Home Assistant
A Model Context Protocol (MCP) server for interacting with Home Assistant. This server provides tools to control and monitor your Home Assistant devices through MCP-enabled applications.
What is Home Assistant?
Home Assistant is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to model context protocol (mcp) server for interacting with home assistant. this server provides tools to control and monitor your home assistant devices through mcp-enabled applications.
A Model Context Protocol (MCP) server for interacting with Home Assistant. This server provides tools to control and monitor your Home Assistant devices through MCP-enabled applications.
This server falls under the Business Applications category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- A Model Context Protocol (MCP) server for interacting with H
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx homeassistant-serverConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Home Assistant
The Home Assistant MCP Server bridges AI assistants such as Claude with your Home Assistant smart home instance, letting you query device states, toggle switches and lights, trigger automations, and enumerate all entities using natural language. It connects over the Home Assistant REST API using a long-lived access token, so it works with both local and remote (Nabu Casa cloud) installations. Smart home enthusiasts and developers who want to control their home through conversational AI — without writing automations manually — will find this the quickest integration path.
Prerequisites
- A running Home Assistant instance (version 2023.x or later recommended) reachable over HTTP/HTTPS
- A Home Assistant long-lived access token (generated in your profile under Security > Long-Lived Access Tokens)
- Node.js 18+ installed on the machine running the MCP server
- An MCP-compatible client such as Claude Desktop or Cursor
Clone and build the server
Clone the repository and install dependencies, then build the TypeScript source.
git clone https://github.com/hekmon8/Homeassistant-server-mcp.git
cd Homeassistant-server-mcp
npm install
npm run buildGenerate a long-lived access token in Home Assistant
In the Home Assistant UI, go to your Profile (bottom-left avatar icon), scroll to the Security section, and click 'Create Token'. Give it a descriptive name like 'MCP Server' and copy the token — it is shown only once.
Identify your Home Assistant URL
Note the base URL for your Home Assistant instance. For local access this is typically http://homeassistant.local:8123 or the machine's IP address. For remote access it may be your Nabu Casa URL or a reverse-proxy domain.
Add the server to your MCP client config
Edit your Claude Desktop or Cursor MCP config to launch the server, passing HA_URL and HA_TOKEN as environment variables.
{
"mcpServers": {
"homeassistant": {
"command": "node",
"args": ["/absolute/path/to/Homeassistant-server-mcp/dist/index.js"],
"env": {
"HA_URL": "http://homeassistant.local:8123",
"HA_TOKEN": "your-long-lived-access-token"
}
}
}
}Restart your MCP client and verify
Restart Claude Desktop or Cursor. Ask the AI to list your Home Assistant entities — a successful response confirms the server is connected and the token is valid.
Home Assistant Examples
Client configuration
Claude Desktop configuration for the Home Assistant MCP server with the required HA_URL and HA_TOKEN environment variables.
{
"mcpServers": {
"homeassistant": {
"command": "node",
"args": ["/Users/yourname/Homeassistant-server-mcp/dist/index.js"],
"env": {
"HA_URL": "http://192.168.1.100:8123",
"HA_TOKEN": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
}
}
}
}Prompts to try
Natural language prompts that exercise the server's entity listing, state reading, toggle, and automation capabilities.
- "List all my Home Assistant entities in the light domain"
- "What is the current temperature reported by sensor.living_room_temperature?"
- "Turn on the kitchen lights"
- "Toggle switch.garage_door"
- "Trigger the automation 'goodnight_routine'"
- "Show the state of all entities in the climate domain"Troubleshooting Home Assistant
401 Unauthorized error when connecting to Home Assistant
The HA_TOKEN is incorrect or has been revoked. Re-generate a long-lived access token in your Home Assistant profile under Security > Long-Lived Access Tokens and update the env block in your MCP config.
Connection refused or timeout — server cannot reach Home Assistant
Verify the HA_URL is correct and reachable from the machine running the MCP server. Try opening it in a browser. If using https with a self-signed certificate, you may need to disable strict TLS verification or add the cert to your system trust store.
Entity not found or toggle has no effect
Use the list_entities tool first to get exact entity IDs (e.g. light.kitchen_overhead). Entity IDs are case-sensitive and must include the domain prefix. Confirm the entity exists and is not unavailable in the Home Assistant UI.
Frequently Asked Questions about Home Assistant
What is Home Assistant?
Home Assistant is a Model Context Protocol (MCP) server that model context protocol (mcp) server for interacting with home assistant. this server provides tools to control and monitor your home assistant devices through mcp-enabled applications. 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 MIT license. You can use it freely in both personal and commercial projects.
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