Google Opens Smart Home Data to Third-Party AI Agents

Google is integrating the Model Context Protocol (MCP) into Google Home, enabling third-party AI agents to access home data, monitor event history, and control connected devices. According to reporting from The Verge and TechCrunch, agents supporting MCP—including Claude, Hermes, Open Claw, ChatGPT, and Google Antigravity—can now act on a user's behalf to perform tasks such as cross-camera analysis, reviewing camera summaries, and building custom dashboards.

Taylor Lehman, group product manager at Google Home & Nest, stated in a blog post that the integration allows agents to securely interact with the Google Home ecosystem. This functionality does not replace Gemini for Home, which remains the primary interface for Google Nest speakers and the Home app, but it adds a layer of control via external interfaces.

Access is currently limited to U.S. users subscribed to Google Home Premium Advanced, which costs $20 per month or $200 per year. To get started, users must configure Home MCP after creating a Google Cloud project.

While the system supports various "Works with Google Home" and Matter devices, including thermostats and doorbells, the shift raises security and safety concerns. Lehman noted that connecting an agent to Home MCP can lead to "unexpected or even undesired behavior," though Google asserts that safety protections are in place to prevent agents from performing specific actions, such as unlocking doors. Lehman recommended that users review Google's terms of service and developer policies.