Create an endpoint for Batch Metadata Editing functions: https://wiki.duraspace.org/display/DSDOC6x/Batch+Metadata+Editing
For example: /api/app/batchmetadata
GET requests to this endpoint should allow for the export of batch metadata (to a CSV), potentially limited to a specific Community or Collection (as that functionality exists in current UIs). As in existing UIs, this is available to Admins, Community Admins and Collection Admins.
PUT requests to this endpoint should allow for the import of batch metadata (via CSV upload). As in existing UIs, this is an Admin Only function.