diff --git a/run_agent.py b/run_agent.py
index 70d9a84b06..ea1ea4af6b 100644
--- a/run_agent.py
+++ b/run_agent.py
@@ -5471,6 +5471,11 @@ class AIAgent:
         # Other anthropic_messages providers (MiniMax, Alibaba, etc.) use their own keys.
         if self.provider != "anthropic":
             return False
+        # Azure endpoints use static API keys — OAuth token rotation doesn't apply.
+        # Refreshing would pick up ~/.claude/.credentials.json OAuth token and break auth.
+        _base = getattr(self, "_anthropic_base_url", "") or ""
+        if "azure.com" in _base:
+            return False
 
         try:
             from agent.anthropic_adapter import resolve_anthropic_token, build_anthropic_client