diff --git a/config/app.php.txt b/config/app.php.txt
index 73a60bc..9f189c4 100644
--- a/config/app.php.txt
+++ b/config/app.php.txt
@@ -15,6 +15,17 @@ error_reporting(E_ALL);
  */
 define('APPLICATION_NAME', 'My YGGo host');
 
+/*
+ * Application mode
+ *
+ * FEDERATIVE - crawl and share distributed index from other YGGo nodes running on same API version
+ * LOCAL      - encapsulated web search portal
+ *
+ * see also: API_ENABLED, API_MANIFEST_ENABLED settings
+ *
+ */
+define('APPLICATION_MODE', 'FEDERATIVE');
+
 // Website
 
 /*
diff --git a/public/api.php b/public/api.php
index 5a10776..a40b89f 100644
--- a/public/api.php
+++ b/public/api.php
@@ -100,8 +100,8 @@ if (API_ENABLED) {
           'status' => true,
           'result' => [
             'applicationName'            => APPLICATION_NAME,
-
-            'websiteDomain'              => WEBSITE_DOMAIN,
+            'applicationMode'            => APPLICATION_MODE,
+            'applicationUrl'             => WEBSITE_DOMAIN,
 
             'crawlUrlRegexp'             => CRAWL_URL_REGEXP,