How to access Chrome's online bookmarks?
Whilst not using an API directly it allows you to query data from google bookmarks online (directly via REST call), and parse it yourself.
http://www.google.com/bookmarks/?output=xml&num=10000I have included a link on how you may parse this data from the "Lite Bookmarks" chrome extension repository.http://www.google.com/bookmarks/?output=xml&num=10000