Since the VISA API seems of interest, MasterCard also has one. I wrote about a particular use case for these APIs, and other commercial ones, in a blog post [1]

Since the VISA API seems of interest, MasterCard also has one. I wrote about a particular use case for these APIs, and other commercial ones, in a blog post [1]. TLDR: You need to be a "verified partner" or be sponsored to use VISA or MasterCard APIs. [1] https://ksred.me/post/a-deeper-look-at-integrating-payments/ https://ksred.me/post/a-deeper-look-at-integrating-payments/