The GroupDocs Java Sample Code by Pavel-Teplitsky presents API interactivity, by providing annotations and viewer. GroupDocs allows to integrate document collaboration with viewer and signature features.
Vitrium has recently announced the release of its Application Programming Interface (API) for its popular document security solution, Protectedpdf. The new API will allow developers to integrate their software and workflows with Vitrium’s DRM and document encryption software.
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.