diff --git a/sat/plugins/plugin_xep_0277.py b/sat/plugins/plugin_xep_0277.py
index e4239110..a1b5c11c 100644
--- a/sat/plugins/plugin_xep_0277.py
+++ b/sat/plugins/plugin_xep_0277.py
@@ -190,6 +190,13 @@ class XEP_0277(object):
             out_sign="s",
             method=self._mbGetFromManyWithComments,
         )
+        host.bridge.addMethod(
+            "mbIsCommentNode",
+            ".plugin",
+            in_sign="s",
+            out_sign="b",
+            method=self.isCommentNode,
+        )
 
     def getHandler(self, client):
         return XEP_0277_handler()
@@ -699,16 +706,16 @@ class XEP_0277(object):
 
     ## publish/preview ##
 
-    def isCommentsNode(self, item_id: str) -> bool:
+    def isCommentNode(self, node: str) -> bool:
         """Indicate if the node is prefixed with comments namespace"""
-        return item_id.startswith(NS_COMMENT_PREFIX)
+        return node.startswith(NS_COMMENT_PREFIX)
 
-    def getParentNode(self, item_id: str) -> str:
+    def getParentItem(self, item_id: str) -> str:
         """Return parent of a comment node
 
         @param item_id: a comment node
         """
-        if not self.isCommentsNode(item_id):
+        if not self.isCommentNode(item_id):
             raise ValueError("This node is not a comment node")
         return item_id[len(NS_COMMENT_PREFIX):]