Do it like this. (By the way, I am German, too in case your profile pic is related to your home country)
Make an unrelated company with website etc. then get a bank account for this company. You then verify it with Stripe etc. Get the API credentials and build a custom checkout which hides API endpoints and not needed meta, like product description etc. . As long as your API Post contains cc number, csv, exp date, name, adresse, plz, city, country and amount, stripe will process the card.
Some providers can give you ready made services for this with wordpress plugin or even do the processing for you and transfer to your bank account or BTC.
@lavel , I really think that
@Bmw850 setup works. However I wouldn't recommend EU companies for this, I'd rather recommend US companies as their pharmacy law is not so strict and they don't care if not shipped into the US.
The king solution is to form an US church and in case stripe asks you about the amounts, you say they are donation packages as you are fund raising for project XYZ. No need for long explanations and business plans. I mostly do a one liner in case they ask.
And before the haters will come and laugh about the church setup and that stripe will never accept churches..... stripe even has a tithe.ly integration as they are partners... . Most people here have no ideas about the possibilities in the US, their system is so crazy no one will believe it...
https://stripe.com/partners/tithely