Exporting the Discussion Boards with Attachments

Is there an easier way to export the Discussion Boards and any attachments? For example, is there a way to get all the threads for a forum that includes the attachment data in a single call? 

We're calling restapi/vc/boards/id/filter/threads to get the list of threads for a board.Then we call /restapi/vc/messages/id/1271/uploads/attachments to get URLs for any attachments. Finally, we can download the attachment using that URL. Needing to make so many individual calls is taking a very long time.