diff --git a/index.html b/index.html
index 8503ed6..0239284 100644
--- a/index.html
+++ b/index.html
@@ -102,6 +102,8 @@
     <script>
         // global package prefix for BRouter web application
         BR = {};
+            
+        console.log('\r\n###\r\n###  BRouter-Web\r\n###\r\n###  Please note that the routing API used here is not public!\r\n###\r\n');
     </script>
 
     <script src="config.js"></script>
diff --git a/js/router/BRouter.js b/js/router/BRouter.js
index a615e03..9ae3f7f 100644
--- a/js/router/BRouter.js
+++ b/js/router/BRouter.js
@@ -1,5 +1,6 @@
 L.BRouter = L.Class.extend({
     statics: {
+        // NOTE: the routing API used here is not public!
         // /brouter?lonlats=1.1,1.2|2.1,2.2|3.1,3.2|4.1,4.2&nogos=-1.1,-1.2,1|-2.1,-2.2,2&profile=shortest&alternativeidx=1&format=kml
         URL_TEMPLATE: BR.conf.host + '/brouter?lonlats={lonlats}&nogos={nogos}&profile={profile}&alternativeidx={alternativeidx}&format={format}',
         URL_PROFILE_UPLOAD: BR.conf.host + '/brouter/profile',