Recently I had a need to implement an on-demand payment model with a payment processor (Cybersource). I use the Active Merchant plugin for transaction operations almost exclusively, and nobody had added support for Cybersource subscriptions or on demand payments. So I implemented it myself over the last couple days, and published the code on github .

Currently it supports creating subscriptions, updating subscriptions (which is also how you cancel), and preforming a purchase (auth+capture) via subscription. I’m willing to implement other things like credits, straight auths and captures if there’s a community need. There’s not much in the way of docs yet (like most of Active Merchant), but it’s working for me. I’d also be willing to write a post on using the features I added, just drop a not in the comments if you would like to see that.

I’ll be submitting a patch soon, and hopefully this will get pulled into the official ActiveMerchant repository. This is the first real open source contribution we’ve made at ELEVATION (most things we need we find are already done), and it feels good to give back. You should try it.