TUAW reports today that Evernote, a versatile note-taking application for Mac and iPhone, has recently opened up a Service API. This comes as an extension to the basic AppleScript support found in the 1.1.5 release, and opens up the possibility of creating homegrown interfaces ranging from simple calendar/todo managers to “thick” clients that can manipulate the entire collection of Evernote data.

The AppleScript library itself is quite useful, albeit slightly limiting. You can retrieve lists of notes based on searches, create new notebooks and notes from a variety of sources, and obtain properties for the various elements of Evernote. The most interesting feature of the AppleScript library is the import/export automation capability. You can export (in well-formed XML) entire notebooks, or notes from a list (such as one generated by a search). These can be transported automatically by whatever means work best for your purposes, and then imported on the other end. This allows for “local” synchronization of large libraries without using up online quotas. It’s also ideal for automatic backup of your notes, among other potential applications.

It’s great to see such a useful application continuing to expand itself and allow for third-party interaction. If you’re interested in developing around Evernote, or just playing with the possibilities, stop by the developer page and take a look around and be sure to check out TUAW’s full article.