even stranger, sending to the v3 hook is translated as a v2 response!
{"name":"gettargetsv3","data":"null","ttl":"120","published_at":"2016-05-20T02:39:16.242Z","coreid":"3f0035001347343432313031"}
{"name":"hook-sent/gettargetsv3","data":"undefined","ttl":"60","published_at":"2016-05-20T02:39:16.285Z","coreid":"particle-internal"}
{"name":"hook-response/gettargetsv2_3f0035001347343432313031/0","data":"true,299,244,287,130,195,240","ttl":"60","published_at":"2016-05-20T02:39:16.415Z","coreid":"particle-internal"}
it must be figuring out webook name async on the reply url…