Google just opened its smart home to outside AI agents. A new integration called Google Home MCP lets third-party agents like Claude, Hermes, Open Claw, and Google’s own Antigravity control your connected devices and dig through your home’s event history, The Verge AI reports. It runs on the Model Context Protocol, the open standard that’s quickly become the default way agents talk to external tools.
This is a bigger deal than it looks. Plenty of assistants can flip a light switch. What Google is handing over here is the data layer underneath the switch. Here’s what that means in practice.
Any MCP agent gets in
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,” Taylor Lehman, group product manager at Google Home & Nest, said in a blog post cited by The Verge AI. Google isn’t picking a winner. If your agent speaks MCP, it can plug in.
It reasons across history, not just commands
This is the part that stands out. According to Lehman, the agent gets access to real-world events and device state history. That unlocks things like:
- Cross-camera analysis, so you can ask what your kid did after getting home from school
- Counting how many loads of laundry you ran last week from appliance state data
- Figuring out how long the lights stayed on in an empty room
- Building a custom dashboard to control your home, generated by the agent itself
- Sending you an audio message through a Google Home speaker when a task is done
Traditional smart home setups are command and control. You tell it, it does it. This moves toward something contextual, where the system understands patterns and acts on them.
Gemini for Home stays in charge of speakers
Home MCP doesn’t replace Gemini for Home, which is still Google’s main interface through the Home app and Nest speakers now that Google Assistant is gone. Think of MCP as an extra layer. Your speakers still answer to Gemini, but a third-party agent can push voice messages through them.
It’s US-only and behind a paywall for now
At launch, you need Google Home Premium Advanced, which runs $20 a month or $200 a year, and you need to be in the US. Access rolls out over the coming weeks. Setup isn’t a one-click toggle either. You have to create a Google Cloud project and configure it to use Home MCP. This is a tinkerer’s feature right now, not something your parents will turn on.
Doors stay locked, and Google warns of surprises
Giving an agent control of locks, thermostats, and HVAC raises obvious safety questions. Google says Home MCP enforces rate limits and safety protections. One concrete example: it won’t let an agent unlock doors. Still, Lehman was candid that depending on the agent, “connecting it to Home MCP can result in unexpected or even undesired behavior,” and he pointed people to Google’s developer policies and terms of service. That’s an unusual admission in a launch post, and worth taking seriously.
Home Assistant already proved this works
The open-source platform Home Assistant shipped a similar MCP integration earlier. The Verge AI’s reporter tested it last year with Claude and found it handled the tasks most interfaces struggle with: troubleshooting devices, writing automations, designing dashboards, and setting up advanced configs, all in plain English. Google is essentially bringing that experience to its own ecosystem.
The real play is infrastructure
Here’s my read. Consumer tinkerers will enjoy this, but the target is developers. Google opened API access to its smart home in 2024, then turned Gemini for Home into a full-stack AI offering. Now it’s letting developers use Antigravity to build custom agents on top of Google Home data. The strategy looks like AWS for the smart home: Google provides the plumbing, other companies build the products, and Google wins no matter which agent you pick.
The catch is trust. As The Verge AI points out, Google has launched and killed a long list of smart home platforms: Android @ Home, Weave, Project Brillo, Works with Nest, Google Assistant. Developers remember. Whether they’ll bet on this one is the open question.
If you’re on Premium Advanced in the US, keep an eye out over the next few weeks. The Verge AI has the full breakdown, including screenshots of what Claude built inside Home Assistant.