Germany-based "business social network" XING announced this week that the XING API is now officially out of beta, and invited external developers to register for access at dev.xing.com. Since March of this year, the XING API has been available as a "closed beta," and XING reported that over three thousand developers tried out the API during that period, "creating almost 150 active apps and producing around 17 million API requests per day."
Some of those apps are featured in the XING Developer site's App Gallery, including Cobook, a unified address book for Mac OS; a HootSuite app for social networking; and a Connector app which links XING to Promerit, an "integrated HR services" company also based in Germany.
At the end of February, the XING Developer blog posted a "spoiler alert" about the then-impending API beta program. At that time, the company disclosed that it had "decided to completely redesign [its] external API" two years earlier, and that the new API had already been "in operational use for more than a year (largely in the form of...Mobile Apps)."
That blog post also listed the features being run through the beta API as of Feburary, 2012, and all those features are represented in the n0w-live public API. The latest release has also made even more API resources available, notably a variety of messages used in the XING network--conversations between users, status messages, and profile updates--and geo location data, to see which XING users are located near specified coordinates.
Despite being headquartered in Germany and receiving most of its traffic from the DACH region, XING supports a larger number of languages than either of its competitors, American juggernaut LinkedIn or Paris-based rival Viadeo. According to a 2011 report by IKO System, the French sales intelligence company, "LinkedIn has more members but is much less efficient in driving subscription revenues from its members... In terms of subscribers, Xing[sic] is even #1 in the world with more than 700k premium members."
Paying members may be more likely to supply higher quality data to XING, and if so, its new API should make it easier for developers to take advantage of that in third-party apps.