Authentication is not required for public folders, but is required for folders that are owned by users.
If authentication is required, the user must have 'View' permission on the folder. View permission is granted through the Reader, Contributor, or Manager role of a folder. To test whether the current user can get a list of roles of a folder, use the API for Retrieving the list of members for a folder's role to see if the user belongs to one of the required roles.
The following access roles are available:
||View a folder and all media in it.
||Add to a folder and delete items they added.
||Add and remove any item; assign roles.
The following error codes could appear in a response body for an invalid request:
||Returned when the cause of an error is unknown
||Returned when the cause of an error is related to a resource not being found