Home-Assistant has API for everything they connect to

[b1n9 1]

You can leverage Home Automation dashboard Home-Assistant to get status and be able to control a vast amount of components: 

 

https://home-assistant.io/components/#all

 

Basically you can connect directly to Home-Assistant's API and leverage them to give you access to all of the items that are above.  I do this to make all of those items exposed to homekit which helps me out wonderfully. 

 

https://home-assistant.io/

 

here is how I connect home-assistant to homekit 

 

https://github.com/home-assistant/homebridge-homeassistant

 

That is the basics of how to use the home-assistant api

 

https://home-assistant.io/developers/rest_api/

 

Hopefully that helps you all out