diff --git a/python/packages/autogen-ext/src/autogen_ext/models/anthropic/_anthropic_client.py b/python/packages/autogen-ext/src/autogen_ext/models/anthropic/_anthropic_client.py
index 5dff5813cf55..d5f9d62b7420 100644
--- a/python/packages/autogen-ext/src/autogen_ext/models/anthropic/_anthropic_client.py
+++ b/python/packages/autogen-ext/src/autogen_ext/models/anthropic/_anthropic_client.py
@@ -1193,11 +1193,15 @@ def __init__(self, **kwargs: Unpack[AnthropicBedrockClientConfiguration]):
         if bedrock_info is None:
             raise ValueError("bedrock_info is required for AnthropicBedrockChatCompletionClient")
 
-        # Handle bedrock_info as secretestr
+        # Handle bedrock_info
         aws_region = bedrock_info["aws_region"]
-        aws_access_key = bedrock_info["aws_access_key"]
-        aws_secret_key = bedrock_info["aws_secret_key"]
-        aws_session_token = bedrock_info["aws_session_token"]
+        aws_access_key: Optional[str] = None
+        aws_secret_key: Optional[str] = None
+        aws_session_token: Optional[str] = None
+        if all(key in bedrock_info for key in ("aws_access_key", "aws_secret_key", "aws_session_token")):
+            aws_access_key = bedrock_info["aws_access_key"]
+            aws_secret_key = bedrock_info["aws_secret_key"]
+            aws_session_token = bedrock_info["aws_session_token"]
 
         client = AsyncAnthropicBedrock(
             aws_access_key=aws_access_key,