diff --git a/agents-api/agents_api/models/session/create_or_update_session.py b/agents-api/agents_api/models/session/create_or_update_session.py
index 60c0b7f71..8f285dadc 100644
--- a/agents-api/agents_api/models/session/create_or_update_session.py
+++ b/agents-api/agents_api/models/session/create_or_update_session.py
@@ -62,7 +62,6 @@ def create_or_update_session(
         raise ValueError("Only one of 'agent' or 'agents' should be provided.")
 
     agents = agents or ([agent] if agent else [])
-    assert len(agents) > 0, "At least one agent must be provided."
 
     # Users are zero or more, so we default to an empty list if not provided.
     if not (user or users):