Xero Workpapers API
Xero now has an integrated Workpapers application (http://www.xero.com/workpapers). This is a placeholder to track requests and potential use cases so we can evaluate development of this feature.
AdminXero Developer Platform (CEO / Founder, Xero Developer Centre) shared this idea
There are no current plans to develop an API for Xero Workpapers, but please add your vote and a comment on potential use cases if this is something you are interested in seeing.