Cryptsy offers bitcoin and digital currency trading services. The Cryptsy Node.js library created by Ek Palmer contains an illustrated example to demonstrate a list of all markets that participate in trade events. What the API does for users is to allow the query of general market data and orderbook data. Additional information such as market data, transactions, and execution of trades is available with authenticated methods.
Intuit has announced the release of several new resources for developers to integrate desktop applications with web-based applications. The new Intuit App Center allows QuickBooks users to access third party web applications developed with the Intuit Partner Platform. This move effectively bridges Intuit's suite of desktop accounting software with applications that run in the cloud.
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.