Making ad-hoc card charges

I have a requirement to make ad-hoc charges to users credit cards. As I don't want to get anywhere near having to worry about credit card storage and all the associated stuff that comes with it I'm looking 开发者_运维知识库for a middleman service that would handle all this for me, ideally supplying me with an API that I can use to add/remove cards, and make charges through.

I don't need recurring billing or anything like that just a simple card store for ad-hoc charges.

Does anyone have any recommendations based on previous actual experience, or know of any that are worth looking at?

Authorize.Net's Customer Information Manager (CIM) does exactly what you're looking for.