diff --git a/hs_roles.py b/hs_roles.py
index cd7c7d5..165af08 100644
--- a/hs_roles.py
+++ b/hs_roles.py
@@ -1,5 +1,13 @@
 import role
+import requests
+import json
+
 class GroupOfNames(role.GroupOfNames):
     member_form = 'uid=%s,ou=People,dc=hackerspace,dc=pl'
 
+class AtHackerspace(role.Role):
+    def __call__(self, login, context=None):
+        return login in map(lambda x: x['login'], 
+                requests.get('http://at.hackerspace.pl/api').json['users'])
+
 from role import Allow, Deny, PamGroup, PosixGroup