diff --git a/index.js b/index.js
index 9bfe841..e5abe41 100644
--- a/index.js
+++ b/index.js
@@ -47,6 +47,8 @@ function onIncomingMessage(params) {
             return;
         }
 
+        if (params.do_not_forward_to_core) return;
+
         try {
             var data = JSON.parse(body);
         }