With EVMOTE it had the option of adding webhooks, where I could send a POST (Text/Plain) request to my car via IFTTT, similar to your TeslaFi API access I presume but with controls.
e.g. https://www.evmote.com/ifttt/5f8242b1-7b4a-4fa3-a83b-33eaf683b29f/honk would honk my Tesla horn. I could then add this to IFTTT so if my Nest smoke alarms went off the car would honk etc.
Do you think that would be possible to add to TeslaFi?
Customer support service by UserEcho