As per my understanding, once a file is uploaded in jive that is stored into the binstore and then files are classified by upload type, image, document,blog, discussion attachment, and/or etc (or based on its content type). Does Jive provide some REST API that can directly fetch binstore content library ? Or even individual files ?
The standard Jive REST API for GET /contents will return the URL to get the Binary Document. The binstore is an encrypted filestore on Jive's services and there is no API to access it directly.
You can see the File entity - Jive REST API v3.14 → File entity - has a binaryURL key whose value is the link to the binary.