diff --git a/webhook_to_fedora_messaging/endpoints/util.py b/webhook_to_fedora_messaging/endpoints/util.py
index 0650ebc..0c0f8c3 100644
--- a/webhook_to_fedora_messaging/endpoints/util.py
+++ b/webhook_to_fedora_messaging/endpoints/util.py
@@ -1,5 +1,6 @@
 from flask import Response, Request
 
+
 def not_found() -> Response:
     return Response({'message': 'Not Found'}, status=404, mimetype='application/json')
 
@@ -7,14 +8,22 @@ def not_found() -> Response:
 def success(data: dict) ->Response:
     return Response(data, status=200, mimetype='application/json')
 
+
 def bad_request() -> Response:
     return Response("{'message': 'Bad Request'}", status=400, mimetype='application/json')
 
+
 def created(data: dict) -> Response:
     return Response(data, status=201, mimetype='application/json')
 
+
 def conflict(data: dict) -> Response:
     return Response(data, status=409, mimetype='application/json')
 
-def validate_request(request: Request, fields=['username']):
-    return all(field in request for field in fields)
\ No newline at end of file
+
+def unprocessable_entity() -> Response:
+    return Response("{'message: 'Unprocessable Entity'}", status=429, mimetype="application/json")
+
+
+def validate_request(request: dict, fields=['username']) -> bool:
+    return all(field in request for field in fields)