The Google Shopping Content Objective-C Library by Google can access API data to sell products on Google, list ads, drive traffic, and increase sales. Developers can interact with the JSON API, working with iOS 3+ and Mac OS X 10.5+. Available introduction and example applications.
Jumpseller allows users to create online stores without technical know how. The Jumpseller API allows users to incorporate Jumpseller features directly with an existing website. An online store typically requires infrastructure, front end and back end set up, ongoing maintenance, and more. Jumpseller aims to take care of such details so store owners can focus on growing business.
CallME's RESTful click-to-call API allows you to integrate Click-to-Call into your website as connect any phone number to another number easily. The service provides calling from a browser, voice messaging and a few other telephony features.