Open payment gateway libraries for Java, Python, Ruby, Node.JS, and PHP

Question

I\'m looking for generic and open source payment libraries that support many different payment processor APIs. In other words, I\'d like to develop an application using a single

Answer 1

What I have seen done is just wrapping Active Merchant into a light weight web service which exposes a rest API that any of your languages can talk to. This was for a larger company that could properly lock down their networks though, so DYODD.