The PSPDFKit Android Sample Code demonstrates how to access the API to implement PDF features including viewer, annotations, forms, digital signatures, indexed search, document editor, replies, image documents, redaction, and comparison.
Our API directory now includes 43 documents APIs. The newest is the Mover.io API. The most popular, in terms of mashups, is the Drawloop API. We list 2 Drawloop mashups. Below you'll find some more stats from the directory, including the entire list of documents APIs.
Late last week Google announced the release of version 3.0 of their Google Documents List Data API. This latest release addresses several feature requests filed by developers and also aims to improve speed and stability of the API itself (our Documents List Data API Profile). The most notable detail in this release is the ability to upload and download files in PDF.