Good point. I suppose this is more competing with Paypal's standard payments (free), as opposed to Paypal's Payments Pro ($30/month). Although even with the free Paypal account the user can still pay with a CC, on paypal.com.<p><i>What alternative services are there to PayPal that offer the ability to act only as payment processors that get called via an API?</i><p>Authorize.net is the 800 lb. gorilla, and I believe 2checkout offers a similar service.