Google Home adds Model Context Protocol integration for third-party AI agents

Google is integrating the Model Context Protocol (MCP) into Google Home, enabling third-party AI agents that support MCP to control and monitor devices within the Google Home ecosystem. According to Taylor Lehman, group product manager at Google Home & Nest, the integration allows agents such as Google Antigravity, Claude, Hermes, or Open Claw to securely access device data and event history, and to act on behalf of users.

The integration introduces capabilities such as cross-camera analysis, enabling users to query their agent about events like a child arriving home from school. It also allows agents to analyze device state history to answer questions about household activities, such as the number of laundry loads or duration lights were left on. Agents can further interact with users via voice by sending audio messages through Google Home speakers once tasks are completed.

Google emphasizes that the integration does not replace Gemini for Home, which remains the primary interface for interacting with Google Home through the Home app and Google Nest smart speakers. Instead, MCP integration adds a secondary control layer that allows third-party agents to interact directly with connected devices through their own interfaces.

At launch, the MCP integration is available to Google Home Premium Advanced users in the US, priced at $20 per month or $200 per year, with access rolling out over the coming weeks. Setup requires creating a Google Cloud project and configuring it to use the Home MCP.

Google states that Home MCP enforces safety protections, including rate limits and restrictions that prevent agents from unlocking doors. However, the company warns that connecting an agent to Home MCP can still result in unexpected or undesired behavior, advising users to review Google’s developer policies and terms of service before enabling the integration.