Looking for 3rd Party Credit Card processor (not software)

Hi, all!

I'm currently working with a customer that would like to add both one time
and recurring credit card billing to their online system.

In doing some research it seems it's worth it to use a 3rd party where you
only store a "token" on your system and use that to make API calls to do
the credit card transactions.

We would be looking mainly for a web service type interface to do the
transactions. I would be most likely using our GETURI product for the HTTP
calls/transactions.

What we would require would be:

1. The ability for both one time and recurring charges
2. The ability to also call them to charge and or/refund charges for the
customers
3. HTTP Web service interface
4. Of course, compliant with all the rules and regulations involved.

Looking for any and all suggestions. Not really looking for a software
package, but instead a service to call using web services for the majority
of the transactions.

Thanks!

Brad
www.bvstools.com