Google on September 16, 2026 opened early access to Home MCP, a Model Context Protocol server that lets third-party AI agents monitor, control, and query devices across the Google Home ecosystem7,2. The rollout is limited to Google Home Premium Advanced subscribers in the United States, with access expanding over the coming weeks9.
Home MCP connects any MCP-compatible agent to the full device graph and event history inside a user's Google Home setup10,5. Google named Google Antigravity, Claude, Hermes, Open Claw, and ChatGPT as supported agents8. Compatible hardware spans Google Nest cameras, doorbells, and thermostats, as well as Works with Google Home and Matter devices such as smart light bulbs.
What agents can do
Google described four functional categories on its MCP servers overview page: entity enumeration, which lists rooms and devices in a structure; real-time state monitoring; parameterized device control; and historical analysis of past states and event logs. In practice, the company said early testers used the connection to pull cross-camera summaries of household activity, track device-state history such as laundry loads completed in a week, receive audio messages on a Google Home speaker when an agent finishes an asynchronous task, and assemble custom smart-home dashboards.
"It allows any AI agents that support MCP, including Google Antigravity, Claude, Hermes or Open Claw, to securely work with all of the devices and event history in your Google Home ecosystem," said Taylor Lehman, group product manager for Google Home & Nest.
Google said Home MCP enforces rate limits and safety protections, including a prohibition on sensitive actions such as unlocking doors. The company also cautioned that connecting a real home to an agent gives that agent control over devices and can produce unexpected behavior depending on the agent.
Setup and pricing
Configuration requires an active Google Home Premium Advanced subscription, a Google Cloud project with the Home API enabled, an OAuth consent screen, and an MCP-compatible AI client. The Home MCP server URL is https://home.googleapis.com/mcp. Google Home Premium Advanced is listed at $20 per month or $200 per year. The Advanced tier includes 60 days of event-based video history, 10 days of 24/7 video history for cameras and wired doorbells, descriptive notifications, video-history search, event descriptions, and daily summaries.
Google Home smart speakers will continue to be controlled by Gemini for Home; Home MCP does not replace that integration. Creating and managing automations through Home MCP is not supported at launch, though Google said it plans to add that capability in a future release.
Developer-facing server
Alongside the consumer-facing server, Google introduced Home Developer MCP, a separate server aimed at developers that grounds AI coding tools in verified technical documentation, including Home API references, integration guides, the Matter specification, and OpenThread and Thread documentation. Home Developer MCP works with the Google Antigravity suite, Claude Code, Cursor, and GitHub Copilot in VS Code. It authenticates through unauthenticated trial paths or project API keys rather than the user OAuth flow that Home MCP requires.
ANALYSIS By exposing the Google Home device graph through MCP rather than a proprietary API, Google is positioning its smart-home platform as agent-neutral infrastructure, letting competing AI providers serve as the interaction layer while Google retains the hardware and subscription revenue.
Google is soliciting feedback from early adopters through its Smart Home for Developers Community. The Premium Advanced subscription is currently required; Google did not comment on availability for other plans or markets.