Home Assistant Control Home Assistant smart home and query states using MCP protocol. Prerequisites Enable MCP server in Home Assistant: Browse to your Home Assistant instance. Go to Settings > Devices & services. In the bottom right corner, select the + Add Integration button. From the list, select Model Context Protocol. Follow the instructions on screen to complete the setup. Config When prompted that the MCP server does not exist, remind the user to configure the HASS_BASE_URL and HASS_ACCESS_TOKEN environment variables by executing the following command to add the configuration: npx -y mcporter config add home-assistant \ --transport http \ --url " ${HASS_BASE_URL :- http : / / homeassistant.local : 8123} /api/mcp" \ --header "Authorization=Bearer \ ${HASS_ACCESS_TOKEN} " Usage

Get states

npx -y mcporter call home-assistant.GetLiveContext

Turn on the device

npx -y mcporter call home-assistant.HassTurnOn ( name: "Bedroom Light" ) npx -y mcporter call home-assistant.HassTurnOn ( name: "Light" , area: "Bedroom" )

Turn off the device

npx -y mcporter call home-assistant.HassTurnOff ( name: "Bedroom Light" ) npx -y mcporter call home-assistant.HassTurnOff ( area: "Bedroom" , domain: [ "light" ] )

Control light

brightness: The percentage of the light, where 0 is off and 100 is fully lit.

color: Name of color

npx -y mcporter call home-assistant.HassLightSet ( name: "Bedroom Light" , brightness: 50 )

Control fan

percentage: The percentage of the fan, where 0 is off and 100 is full speed.

npx -y mcporter call home-assistant.HassFanSetSpeed ( name: "Fan" , area: "Bedroom" , percentage: 80 ) Execute the following command to learn about specific usage methods: npx -y mcporter list home-assistant --schema --all-parameters About mcporter To improve compatibility, use npx -y mcporter instead of mcporter when executing commands. https://github.com/steipete/mcporter/raw/refs/heads/main/docs/call-syntax.md https://github.com/steipete/mcporter/raw/refs/heads/main/docs/cli-reference.md