Push message with invoice or quote

What i would like to know: Is it possible to create a api to a push service like sendpulse so that the customer would receive a pushmessage that is qoute or invoice is waiting for him. when the pushmessage is opend they will go to the guest portal to see the qoute or invoice?

there’s no api in V1 which would enable to incoperate these kind of functions into an app. so my guess is… you would have to extend the functionality by yourself at this point.