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.
Innovation in web service APIs is not always technical, sometimes it's about money. Such is the case with Yahoo's announcement that later this year they will begin charging for usage of BOSS (Build your Own Search Service), their search web service for developers. Given that search revenue is typically ad-driven, and that advertising doesn't typically mesh with APIs, this has meant that search APIs have been one of the most challenging classes of APIs for providers to monetize. So it's notable to see how Yahoo has chosen to tackle this: via a 'utility' pricing model, somewhat akin to how infrastructure services like Amazon Web Services charge by usage.
It sure beats instant coffee. A major change to Google's results page has created an intense interest in interfaces that provide immediate feedback. Google Instant, which updates search results as you type, inspired YouTube Instant, which many developers have emulated using a number of different APIs.
Factual recently announced a new SDK that enables third party apps and services to pull location data from its massive database and trigger certain actions in response to data points like location, environment, movement and more. The SDK is easily used through the Garage Web UI.