Most, although not all, of the content and functionality available in DataScope Select is available in the REST API.
Attachments: Up to 2 attachments (including images) can be used with a maximum of 512.0 KiB each and 1.0 MiB total.
Update: bulk feeds are available now. Screener is planned for Q1 2017.
I cannot load my instrument list from a csv file.