Quotas:

/quotas is a GET only call that only CACHE users can access. It takes an optional parameter ?user=<user> to specify looking at cached directory quota information for a specific user. It also takes a required parameter &sum=<nsQuotaRatioUsed|dsQuotaRatioUsed> to specify which quota you wish to look at; either namespace or diskspace. Directories can be added to NNA for quota scanning via /addDirectory and /removeDirectory ADMIN endpoints.

Response code is 200 and a JSON dump of directories and a mapping to a percentage (0-100) of their quota used.

Response code of 403 means you are not authorized to view this endpoint.