Please answer LibraryThing related questions here (and on the other Help and FAQ pages). To ASK questions, however, please use Talk.
 I crave data. Do you guys have any APIs?
Indeed we do. Check out the LibraryThing APIs for what we provide.
See also this forum thread.
 Why can't you provide an API to full bibliographic data?
Much of LibraryThing's data comes from Amazon, who prohibit what would amount to an API to their API. We are working to open source our library-data engine, MARCThing.