diff --git a/class/core/crontab_api.py b/class/core/crontab_api.py
index 568cff272..ef6e461ad 100755
--- a/class/core/crontab_api.py
+++ b/class/core/crontab_api.py
@@ -17,5 +17,8 @@ class crontab_api:
     def __init__(self):
         pass
 
+    def listApi(self):
+        return '123'
+
     ##### ----- start ----- ###
     ##### ----- start ----- ###