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?

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