diff --git a/nostr/message_type.py b/nostr/message_type.py
index 111553a..3f5206b 100644
--- a/nostr/message_type.py
+++ b/nostr/message_type.py
@@ -7,4 +7,9 @@ class RelayMessageType:
     EVENT = "EVENT"
     NOTICE = "NOTICE"
     END_OF_STORED_EVENTS = "EOSE"
-    
\ No newline at end of file
+
+    @staticmethod
+    def is_valid(type: str) -> bool:
+        if type == RelayMessageType.EVENT or type == RelayMessageType.NOTICE or type == RelayMessageType.END_OF_STORED_EVENTS:
+            return True
+        return False
\ No newline at end of file