The official MercadoLibre Java SDK by MercadoLibre calls the MercadoLibre RESTful API which provides tools to create an online store. This SDK is used to handle the OAuth WebServer flow, and there is no JSON parsing.
The selling of digital goods online is a fast growing industry and FetchApp is designed to make it as streamlined a process as possible. It's basically a digital delivery application that covers everything from digital storage and inventory security to download restrictions and file transfer. FetchApp is already compatible with PayPal, Google Checkout, Goodsie, BigCommerce, FoxyCart, and Shopify, but also provides the FetchApp API for developers who would like to integrate the data with any other system.
PayZang, payment processing provider, has introduced a new payment API. The API allows merchants to integrate payment options with third party applications and platforms. PayZang hopes to attract new customers with the API because integration will speed up online shopping and bill pay experiences.