The Pin Payments Node.js SDK by Pin Payments allows to interact with the API to accept credit card payments. In addition to the library available for download, the site offers a sample code with amount, description, email, IP address, and card as API constants.
Vantiv has announced the general availability of its payment processing API: triPOS Cloud. triPOS Cloud is an open architecture platform that allows merchants and ISVs to integrate Vantiv's payment processing features with their POS systems across hardware and software platforms.
Dwolla has launched a number of services and APIs in the recent past in an attempt to achieve its goal of "building the ideal API to move money." In an attempt to streamline its various services, Dwolla has repositioned its Access API to act as the umbrella to house all of its payment services.