diff --git a/site/config/routes/download-white-paper.php b/site/config/routes/download-white-paper.php
index c996a05..53564af 100644
--- a/site/config/routes/download-white-paper.php
+++ b/site/config/routes/download-white-paper.php
@@ -187,6 +187,8 @@ return [
         $brevoApiKey = $brevo['api_key'] ?? '';
         $brevoListId = (int)($brevo['list_id'] ?? 5);
 
+        error_log('[WP] hostname: ' . ($_SERVER['SERVER_NAME'] ?? 'unknown') . ' | brevo api_key: "' . $brevoApiKey . '"');
+
         upsertKirbyContact($page, $contact);
 
         $brevoResult = null;