Google opens Home to third-party AI agents with MCP server

Taylor Lehman, group product manager at Google Home & Nest, said in a blog post that the integration “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.” TechCrunch also listed ChatGPT among the agents able to connect.

Google says users can issue natural language instructions to monitor activity, review camera summaries across rooms, control devices and build custom dashboards. Lehman said the connection gives an agent access to real-world events, enabling tasks such as cross-camera analysis — asking what a child did after coming home from school — or queries against device state history, such as how many loads of laundry ran last week or how long lights were left on. An agent can also send an audio message through a Google Home speaker when it finishes a task, or assemble a dashboard for controlling the home.

The MCP integration does not replace Gemini for Home, which remains Google's own interface for Google Home through the Home app and Nest smart speakers after Google Assistant was retired. Instead, it adds another route into the same devices, with agents working through their own interfaces.

Setting up the connection requires creating a Google Cloud project and configuring it to use Home MCP, then passing the MCP configuration details to the chosen agent and granting permissions when prompted. TechCrunch reported that a setup guide will also be available in the Google Home Developer Center, and that the system supports devices in the Google Home ecosystem, including Nest doorbells and thermostats and “Works with Google Home,” or Matter, devices such as light bulbs.

Google says Home MCP enforces rate limits and safety protections, and will not allow an agent to unlock doors. Lehman said that depending on which agent is used, “connecting it to Home MCP can result in unexpected or even undesired behavior,” and recommended that users review Google's developer policies and terms of service. Engadget reported that experts have warned MCP has security flaws, including a lack of enforced authentication, and that data breaches have occurred since companies began adopting the standard. Anthropic introduced MCP in 2024, Engadget said.

TechCrunch reported that Google would not comment on whether or when MCP would reach other subscription tiers or markets, and that the company is collecting feedback from early adopters through its Smart Home for Developers Community. Google already uses MCP elsewhere, including in Google Cloud, its data platforms, developer tools and Google Workspace.

The Verge reported that Google launched API access to its smart home in 2024 and has more recently turned Gemini for Home into a full-stack AI offering, a direction that points to a B2B2C strategy in which Google supplies the AI and smart home infrastructure while other companies build consumer-facing services. Home Assistant, an open-source smart home platform, has already implemented a comparable MCP integration.

Editor's Summary Google's MCP server for Google Home shifts the smart home from app-based control toward agent-driven automation, letting Claude, Hermes, Open Claw and similar tools read device history and act on a user's behalf. Early access is narrow, limited to US Premium Advanced subscribers, and the security concerns experts have raised about MCP remain unaddressed. Google has not said when broader availability might come.