The Yipit Node.js SDK by Khaliq allows to communicate with the API to access local deals. Reference provide links to request an API Key, review API documentation, and make requests and responses in HTTP protocols.
Last year, Yelp introduced its completely new Yelp Fusion API. Since its introduction, Yelp has dedicated most of its resources on the new API, and encouraged developers to migrate to Fusion. Over that time period, Yelp has added new features, fixed bugs, and now signals the end of the legacy API.
Last month Yahoo! announced BOSS, its Build Your Own Search Service, which "allows developers and companies to create and launch web-scale search products by utilizing the same infrastructure and technology that powers Yahoo! Search." The REST API allows developers to get results in XML or JSON format for web, news, and image search queries. Recently the official Yahoo! Search Blog showcased a handful of the best mashups that third-party developers created in BOSS's first month of operation.