The Pin Payments PHP SDK by Pin Payments allows API interaction to implement credit card features into applications. It provides a sample code that presents a purchase with description, amount, and currency.
Dwolla is an extremely innovative Payment API and the site allows you to transfer money with one of the least payment charges. We have covered Dwolla before here. Here is an interview with Michael Schonfeld, Developer Evangelist of Dwolla API.
Pine Labs, a provider of a full-stack merchant platform that offers payment and analysis services, has announced the release of an in-store payment API. This announcement comes on the heels of the company’s online payment API recently being made available to developers.