This Amazon Product Advertising library in Node.js supports APA API and request signatures. The main benefit of this work could be the node wrapper that performs HTTP requests, process responses, and parses XML. Because it takes care of those operations, is not necessary to make signatures from scratch. Resources include installation, quick start, and API documentation.
When Zappos released its API, there was a strange restriction: no mobile applications. While sometimes lawyers write terms that aren't formally enforced, Zappos made it clear on its API mailing list that it was serious. Soon, the restriction will be removed and mobile applications will be allowed without written approval.
Over there, by the gum and the tabloid magazines, there's an API. Literally, it's a piece of plastic, but behind it is a company and the APIs that company uses to make the whole operation work. Blackhawk, a subsidiary of Safeway, distributes gift cards for many big-name stores in 90,000 retail locations. And while the cards have always been supported by backend systems, mobile is moving this ten year-old company to an open API approach.
Listrak is an email marketing company solely focused on the ecommerce channel. By getting to know their clients in depth, reviewing clickstream data and transactional history, and plotting customers on a lifecycle grid, Listrak is focused on delivering two things, according to CEO Ross Kramer, "help our customers acquire more new customers, and sell more to existing customers." The Listrak SOAP API makes automation of managing email campaigns easier.