diff --git a/helper/coupang.api.php b/helper/coupang.api.php
index d95891d..3a290f7 100644
--- a/helper/coupang.api.php
+++ b/helper/coupang.api.php
@@ -1,5 +1,6 @@
 <?php
 // Coupang Products Search API
+// https://coupa.ng/bZ3Kba
 
 loadHelper("webpagetool");