diff --git a/src/lfx/src/lfx/mcp/client.py b/src/lfx/src/lfx/mcp/client.py
index 326e00da27c8..abc96ee8ecf1 100644
--- a/src/lfx/src/lfx/mcp/client.py
+++ b/src/lfx/src/lfx/mcp/client.py
@@ -56,9 +56,8 @@ async def close(self) -> None:
 
     def _headers(self) -> dict[str, str]:
         headers = {"Content-Type": "application/json"}
-        token = self.access_token or self.api_key
-        if token:
-            headers["Authorization"] = f"Bearer {token}"
+        if self.access_token:
+            headers["Authorization"] = f"Bearer {self.access_token}"
         if self.api_key:
             headers["x-api-key"] = self.api_key
         return headers