diff --git a/msg-center-api/src/main/java/cn/axzo/msg/center/api/MessageAPIV4.java b/msg-center-api/src/main/java/cn/axzo/msg/center/api/MessageAPIV4.java
index ada8f45f..3a6c0770 100644
--- a/msg-center-api/src/main/java/cn/axzo/msg/center/api/MessageAPIV4.java
+++ b/msg-center-api/src/main/java/cn/axzo/msg/center/api/MessageAPIV4.java
@@ -19,9 +19,6 @@ import javax.validation.Valid;
         url = "${server.serviceUrl:http://msg-center:8080}")
 public interface MessageAPIV4 {
 
-    /**
-     * internal usage only
-     */
     @RequestMapping(value = "api/message/v4/send", method = RequestMethod.POST)
     MessageSendRespV3 send(@RequestBody @Valid MessageSendRequestV4 request);