The syntax looks like this: http://api.flickr.com/services/feeds/photoset.gne?set=<photoset_id>&nsid=<user_id> For example: http://api.flickr.com/services/feeds/photoset.gne?set=72157640206531056&nsid=7155605@N03 To find out a user’s flickr ID got to: http://idgettr.com/