diff --git a/main/manager-api/src/main/java/xiaozhi/common/redis/RedisKeys.java b/main/manager-api/src/main/java/xiaozhi/common/redis/RedisKeys.java
index 5d3b4f32..5e5ec309 100644
--- a/main/manager-api/src/main/java/xiaozhi/common/redis/RedisKeys.java
+++ b/main/manager-api/src/main/java/xiaozhi/common/redis/RedisKeys.java
@@ -62,6 +62,13 @@ public class RedisKeys {
         return "agent:device:count:" + id;
     }
 
+    /**
+     * 获取智能体最后连接时间缓存key
+     */
+    public static String getAgentDeviceLastConnectedAtById(String id) {
+        return "agent:device:lastConnected:" + id;
+    }
+
     /**
      * 获取系统配置缓存key
      */