The LemonStand API provides the ability to integrate its ecommerce tools into almost any website, and is aimed at the midsize merchant market. Built with Php, MySQL and Ajax, it is completely customizable using HTML and CSS. Updates are achieved through a single click. Lemonstand promises an upcoming App store for third party wares.
Based in Vancouver, BC, Payfirma has created an XML-based API that promises custom forms and full shopping carts to keep you in control of developing the flow of your credit card processing. The idea is to make business's lives simpler by reducing development costs with the Payfirma API that accepts Visa, Mastercard, Discover, and American Express among others.