This app: [RELEASE] Google SDM API - Nest integration
I do not recommend sharing it out to anything else from the hub though, the API will complain if you send a ton of commands all at once (like when sliding a thermostat around). So I have it integrated to just the Hub with this app, and for Amazon I use the skill, for Homekit I am using the homebridge nest plugin. I mostly use it on the hub for data collection to send to my database, and now for this rule.
