diff --git a/tradingagents/llm_clients/anthropic_client.py b/tradingagents/llm_clients/anthropic_client.py
index 8539c752..ad7b167d 100644
--- a/tradingagents/llm_clients/anthropic_client.py
+++ b/tradingagents/llm_clients/anthropic_client.py
@@ -1,3 +1,4 @@
+import os
 from typing import Any, Optional
 
 from langchain_anthropic import ChatAnthropic
@@ -9,6 +10,8 @@ from .validators import validate_model
 class AnthropicClient(BaseLLMClient):
     """Client for Anthropic Claude models."""
 
+    _DEFAULT_API_URL = "https://api.anthropic.com"
+
     def __init__(self, model: str, base_url: Optional[str] = None, **kwargs):
         super().__init__(model, base_url, **kwargs)
 
@@ -16,6 +19,13 @@ class AnthropicClient(BaseLLMClient):
         """Return configured ChatAnthropic instance."""
         llm_kwargs = {"model": self.model}
 
+        env_base_url = os.getenv("ANTHROPIC_BASE_URL")
+        if self.base_url and not (
+            env_base_url
+            and self.base_url.rstrip("/") == self._DEFAULT_API_URL
+        ):
+            llm_kwargs["anthropic_api_url"] = self.base_url
+
         for key in ("timeout", "max_retries", "api_key", "max_tokens", "callbacks", "http_client", "http_async_client"):
             if key in self.kwargs:
                 llm_kwargs[key] = self.kwargs[key]