diff --git a/swh/vault/api/server.py b/swh/vault/api/server.py
--- a/swh/vault/api/server.py
+++ b/swh/vault/api/server.py
@@ -33,7 +33,6 @@
 
 
 class VaultServerApp(RPCServerApp):
-    client_exception_classes = (NotFoundExc,)
     extra_type_decoders = DECODERS
     extra_type_encoders = ENCODERS