I had a wonderful run-in with corporate security at a credit card processing company last year (I won't name them this time).
I was asked design an application that allowed users in a secure room to receive instructions for putting gift cards into envelopes, print labels and send the envelopes to the post. There were all sorts of rules about what combinations of cards could go in which envelopes etc etc, but that wasn't the hard part.
These folks had a dedicated label printer for printing the address labels, in their secure room.
The address data was in a database in the server room.
On separate networks.
And there was absolutely no way that the corporate security folks would let an application that had access to a printer that was on a different network also have access to the address data.
So I took a look at the legacy application to see what they did, to hopefully use as a precedent.
They had an unsecured web page (no, not an API, a web page) that listed the addresses to be printed. And a Windows application running on the users' PC that was quietly scraping that page to print the labels.
Luckily, it ceased to be an issue for me, as the whole IT department suddenly got outsourced to India, so it became some Indian's problem to solve.