The Walmart Java code sample is associated with the Walmart Product Lookup API and Walmart Search Lookup API. This code displays how to create iterating code over special buy and clearance. It also shows how to fetch item price and availability. A third example demonstrates how to search results with keywords.
Last month Google announced it was killing off several products, perhaps most notably Google Reader. Caught in the mix, and perhaps somewhat under the radar, was also notice of the deprecation of their shopping search API.
At its Unite developer conference this week, Shopify introduced its new Marketing Events API. The API allows market app developers to track marketing events directly within the Shopify ecosystem. Marketing apps have long been popular within Shopify's App Store, but tracking has been difficult.