diff --git a/server/extension/sql/200_quotas.sql b/server/extension/sql/200_quotas.sql
new file mode 100644
index 0000000..a2e627f
--- /dev/null
+++ b/server/extension/sql/200_quotas.sql
@@ -0,0 +1,15 @@
+CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_monthly_quota(
+  username TEXT,
+  orgname TEXT,
+  service TEXT)
+RETURNS integer AS $$
+  plpy.execute("SELECT cdb_dataservices_server._connect_to_redis('{0}')".format(username))
+  redis_conn = GD["redis_connection_{0}".format(username)]['redis_metrics_connection']
+
+  if service == 'isolines':
+    plpy.execute("SELECT cdb_dataservices_server._get_isolines_routing_config({0}, {1})".format(plpy.quote_nullable(username), plpy.quote_nullable(orgname)))
+    user_isolines_config = GD["user_isolines_routing_config_{0}".format(username)]
+    return user_isolines_config.isolines_quota
+  else:
+    raise 'not implemented'
+$$ LANGUAGE plpythonu;