Most of these APIs already exist, just that they are hidden behind custom apps and auth walls. For example you can order coffee on starbucks.com or doordash.com right now and see all the network requests which facilitate the delivery.

Your receipt: - latte 5.99 - delivery fees 5.99 - ssh fees 0.99 - internet fees 0.59 - water 0.19 - sewage 0.09 …..

    Sub total 5.99
    Total.   10.80

Wait, what?

someone call the ftc lol