Shared link to folder from another Dropbox account

Unfortunately there isn't a way to use recursive mode when listing via a shared link, but I'll pass this along as a feature request. I can't promise if or when that might be implemented though. You'd need to perform the recursion via your own code, by calling /2/files/list_folder[/continue] with each relevant sub-path, if you need nested entries.

If you then need to call /2/sharing/get_shared_link_metadata for a particular file in the linked folder, you can build the "path" value based on the "name" values from the /2/files/list_folder[/continue] result. For example, if there's a file named "example.txt" in the folder, the path would be "/example.txt". Or if it is nested in a sub-folder named "some folder" inside the linked folder, the path would be "/some folder/example.txt".

If you just want to download a file's content directly via a shared link for a parent folder though, you can use /2/sharing/get_shared_link_file, likewise specifying the original shared link for the folder, and the sub-path built from the "name" values.