REST api within application like INVO

Hello everyone. Simple question I hope...

How would you go by implementing REST API explained here ... https://docs.phalcon.io/en/latest/reference/tutorial-rest.html

into application like INVO? https://docs.phalcon.io/en/latest/reference/tutorial-invo.html

I have a little application built of off INVO and need api for data retrieval.

Also I have my application on nginx. Is REST api setup for nginx much different from apache?

By the way... I very like this framework... Thank you very much. :)