Building a real world google/amazon assistant

I see Google plug ins for AR core etc, but do not see Google Assistant.
I am trying to develop a MQQT type interface in Unreal, to control my home(Smart house applications)
my intension is to create a 3d version of a home, place smart device outputs within the environment. Create interaction (On/Off) (Get variable information from temp/etc) use google / amazon assistant to tell me when sunset is, and the be able to run routines and monitor smart devices in the home. So google play, IFFT, etc controlled by either google assistant or Alexa. What will enable me to do this?