The official MercadoLibre Ruby 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.
You are shopping online and want to send a gift. But do you really want to have the retailer send one of those typed out cards with it? Sure, it includes your personal message but it just makes the recipient miss your handwriting and the ink. Sociagram offers online retailers an interesting alternative: the ability for their customers to add a video message. In many cases, that might be a a leap ahead from a pen and ink note--especially in my handwriting. The Sociagram API is the tool for retailers to use the service on their site. There are 15 APIs under "gift" in our API directory, but this could be the first to offer a "social video" twist to the topic.
Strutta provides a platform to "engage your audience and convert fans to customers." It does this by launching and managing contests, sweepstakes, coupons, promotions, and by providing the Strutta API. For example, Crate & Barrel ran a wedding contest to drive couples to set up their wedding registries at the company, and featured friends and families of the contestants voting on the results to generate increased customer involvement.