Home Assistant MCP Server for Google ADK 15 tools — connect in under 2 minutes
Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add Home Assistant as an MCP tool provider through the Vinkius and your ADK agents can call every tool with full schema introspection.
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Vinkius supports streamable HTTP and SSE.
from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
StreamableHTTPConnectionParams,
)
# Your Vinkius token — get it at cloud.vinkius.com
mcp_tools = McpToolset(
connection_params=StreamableHTTPConnectionParams(
url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
)
)
agent = Agent(
model="gemini-2.5-pro",
name="home_assistant_agent",
instruction=(
"You help users interact with Home Assistant "
"using 15 available tools."
),
tools=[mcp_tools],
)
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
About Home Assistant MCP Server
Connect to your Home Assistant instance (local or Nabu Casa cloud) and control your entire smart home from any AI agent. Manage lights, climate, media players, covers, switches, and trigger automations via the Home Assistant REST API.
Google ADK natively supports Home Assistant as an MCP tool provider — declare the Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 15 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.
What you can do
- Entity Discovery — List all entities and their current states across all integrations
- Device Control — Turn lights on/off, adjust brightness, set thermostat temperatures, open/close covers
- Service Calls — Call any Home Assistant service (light, switch, climate, cover, media_player, automation, script)
- State Monitoring — Get real-time state of any entity including sensors, binary sensors, and device trackers
- History & Logbook — Query historical state changes and logbook entries for analysis
- Calendar Management — List and query calendar events from Home Assistant calendars
- Event Automation — Fire custom events to trigger Home Assistant automations
- Template Rendering — Render Jinja2 templates for advanced state access
- Configuration — View system configuration, loaded components, and validate configuration
- Local or Cloud — Works with local instances (http://IP:8123) or Nabu Casa cloud (https://INSTANCE.ui.nabu.casa)
The Home Assistant MCP Server exposes 15 tools through the Vinkius. Connect it to Google ADK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.
How to Connect Home Assistant to Google ADK via MCP
Follow these steps to integrate the Home Assistant MCP Server with Google ADK.
Install Google ADK
Run pip install google-adk
Replace the token
Replace [YOUR_TOKEN_HERE] with your Vinkius token
Create the agent
Save the code above and integrate into your ADK workflow
Explore tools
The agent will discover 15 tools from Home Assistant via MCP
Why Use Google ADK with the Home Assistant MCP Server
Google ADK provides unique advantages when paired with Home Assistant through the Model Context Protocol.
Google ADK natively supports MCP tool servers — declare a tool provider and the framework handles discovery, validation, and execution
Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with Home Assistant
Production-ready features like session management, evaluation, and deployment come built-in — not bolted on
Seamless integration with Google Cloud services means you can combine Home Assistant tools with BigQuery, Vertex AI, and Cloud Functions
Home Assistant + Google ADK Use Cases
Practical scenarios where Google ADK combined with the Home Assistant MCP Server delivers measurable value.
Enterprise data agents: ADK agents query Home Assistant and cross-reference results with internal databases for comprehensive analysis
Multi-modal workflows: combine Home Assistant tool responses with Gemini's vision and language capabilities in a single agent
Automated compliance checks: schedule ADK agents to query Home Assistant regularly and flag policy violations or configuration drift
Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including Home Assistant
Home Assistant MCP Tools for Google ADK (15)
These 15 tools become available when you connect Home Assistant to Google ADK via MCP:
call_ha_service
This is the primary way to control devices in Home Assistant. COMMON SERVICE CALLS: - light.turn_on: entity_id, brightness (0-255), color_temp, rgb_color - light.turn_off: entity_id - switch.turn_on: entity_id - switch.turn_off: entity_id - climate.set_temperature: entity_id, temperature - climate.set_hvac_mode: entity_id, hvac_mode (heat, cool, auto, off) - cover.open_cover: entity_id - cover.close_cover: entity_id - media_player.turn_on: entity_id - media_player.turn_off: entity_id - media_player.media_play: entity_id - automation.trigger: entity_id - script.turn_on: entity_id DOMAINS: light, switch, climate, cover, fan, lock, media_player, automation, script, scene, input_boolean, input_number, notify PARAMETERS: - domain (REQUIRED): Domain name (e.g. light, switch, climate) - service (REQUIRED): Service name (e.g. turn_on, turn_off, set_temperature) - service_data (OPTIONAL): JSON object with service parameters including entity_id EXAMPLES: - "Turn on living room light" → domain="light", service="turn_on", service_data={"entity_id":"light.living_room"} - "Set bedroom temperature to 20" → domain="climate", service="set_temperature", service_data={"entity_id":"climate.bedroom","temperature":20} Call a Home Assistant service on a domain
check_ha_configuration
Check Home Assistant configuration validity
fire_ha_event
The event type must match automation triggers configured in Home Assistant. Fire a custom event in Home Assistant
get_api_status
Use this as a connectivity test before making other API calls. Check if the Home Assistant API is running
get_calendar_events
Get events from a Home Assistant calendar
get_entity_history
Useful for analyzing trends and past behavior. Get historical state data for an entity
get_entity_state
Use entity IDs from list_entity_states (e.g., light.living_room, climate.bedroom, sensor.temperature). Get the current state of a specific entity
get_ha_config
Get the Home Assistant configuration details
get_logbook_entries
Can be filtered by entity and time range. Get Home Assistant logbook entries
list_available_services
g., light: turn_on, turn_off, toggle; climate: set_temperature, set_hvac_mode). Essential for discovering what actions can be performed. List all available services across all domains
list_entity_states
Each entity includes entity_id, state, last_changed timestamp, and attributes. Essential for discovering available devices. List all entity states in Home Assistant
list_ha_calendars
List all calendars configured in Home Assistant
list_ha_components
List all loaded components/integrations in Home Assistant
list_ha_events
Useful for understanding what events Home Assistant is tracking. List all event types currently registered in Home Assistant
render_ha_template
Useful for accessing HA template functions and state from the API. Render a Jinja2 template in Home Assistant
Example Prompts for Home Assistant in Google ADK
Ready-to-use prompts you can give your Google ADK agent to start working with Home Assistant immediately.
"List all my smart home entities and show me the lights."
"Turn on the living room light and set it to 50% brightness."
"What is the current temperature in the bedroom and what mode is the thermostat?"
Troubleshooting Home Assistant MCP Server with Google ADK
Common issues when connecting Home Assistant to Google ADK through the Vinkius, and how to resolve them.
McpToolset not found
pip install --upgrade google-adkHome Assistant + Google ADK FAQ
Common questions about integrating Home Assistant MCP Server with Google ADK.
How does Google ADK connect to MCP servers?
Can ADK agents use multiple MCP servers?
Which Gemini models work best with MCP tools?
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Connect Home Assistant to Google ADK
Get your token, paste the configuration, and start using 15 tools in under 2 minutes. No API key management needed.