diff --git a/Allowlist.txt b/Allowlist.txt
index af7dd10..6d43951 100644
--- a/Allowlist.txt
+++ b/Allowlist.txt
@@ -476,6 +476,13 @@ app.o2online.de
 #     ██ ██   ██ ██    ██ ██      ██      ██      ██  ██ ██ 
 #███████ ██   ██  ██████  ██      ██      ███████ ██   ████ 
 
+# -----------------------------------------
+# 🧩 CHECK24 – App Middleware
+# -----------------------------------------
+# 🟢 Core API / Vergleichsdaten
+appmiddleware.hintl.check24.com
+# -----------------------------------------
+
 # -----------------------------------------
 # 🛍️ ZALANDO – Shop / App Funktion
 # -----------------------------------------