MCP Servers

hass-mcp

MCP server for controlling and querying Home Assistant via its REST API, exposing tools to get entity states, list all states, and call services.

README

hass-mcp

An open-source MCP server for controlling and querying Home Assistant.

Transport: stdio
Auth: Home Assistant long-lived token
API: Home Assistant REST API

Features

Tools exposed:

ha_get_state — get state for an entity
ha_list_states — list all states (can be large)
ha_call_service — call any service

Install

pnpm install
pnpm build

Run

export HASS_URL="http://homeassistant.local:8123"
export HASS_TOKEN="<your long-lived access token>"

pnpm start

Configure in an MCP client

Example (conceptual):

{
  "mcpServers": {
    "homeassistant": {
      "command": "npx",
      "args": ["-y", "hass-mcp"],
      "env": {
        "HASS_URL": "http://homeassistant.local:8123",
        "HASS_TOKEN": "..."
      }
    }
  }
}

Security

Treat tokens as secrets.
Prefer running this server on the same LAN as Home Assistant.
If your HA is behind Cloudflare Access, run this MCP server on the LAN side.

License

MIT

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