Google Opens Smart Homes to AI Agents With MCP

Model Context Protocol (MCP) is an open standard that lets AI models connect to external data and tools through a common interface. Bringing it to Google Home loosens the ecosystem’s reliance on Gemini and gives third-party agents such as Anthropic’s Claude and OpenAI’s ChatGPT a route, with user authorization, to inspect household data and act on connected devices. The move is significant because it shifts smart-home assistants from closed voice-control systems toward interoperable agents that can combine home telemetry with broader tasks and services.

Google began rolling out early access to the Home MCP server on Sept. 15, 2026, initially for U.S. subscribers to Google Home Premium Advanced, priced at $20 a month. The service can query real-time device states and event history, issue commands across Nest, Works with Google Home and Matter products, review camera summaries and support custom dashboards. Setup requires a Google Cloud project, Home API access and OAuth credentials, with availability expanding over the following weeks. Google blocks sensitive actions such as unlocking doors, while automations remain unsupported; the company has not provided a timetable for other subscription tiers or markets.