diff --git a/Controllers/kagiSummarizerController.php b/Controllers/kagiSummarizerController.php
index c2a0c54..3fa1b84 100644
--- a/Controllers/kagiSummarizerController.php
+++ b/Controllers/kagiSummarizerController.php
@@ -3,6 +3,18 @@
 class FreshExtension_kagiSummarizer_Controller extends Minz_ActionController {
   public function summarizeAction() {
     $this->view->_layout(false);
+
+    $kagi_token = FreshRSS_Context::$user_conf->kagi_token;
+
+    if ($kagi_token === null || trim($kagi_token) ==='') {
+      echo json_encode(array(
+        'response' => array(
+          'output_text' => 'No Kagi token configured.',
+          'error' => 'configuration'),
+        'status' => 200));
+      return;
+    }
+
     $entry_id = Minz_Request::param('id');
     $entry_dao = FreshRSS_Factory::createEntryDao();
     $entry = $entry_dao->searchById($entry_id);
@@ -19,7 +31,7 @@ class FreshExtension_kagiSummarizer_Controller extends Minz_ActionController {
     curl_setopt($curl, CURLOPT_URL, $url);
     curl_setopt($curl, CURLOPT_HTTPHEADER, array(
       'Content-Type: application/json; charset=UTF-8',
-      'Authorization: ' .  FreshRSS_Context::$user_conf->kagi_token
+      'Authorization: ' . $kagi_token
     ));
     curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
     curl_setopt($curl, CURLOPT_HEADER, true);