> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-javaex-1765204202-a1f8093.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Trace with Anthropic

The `wrap_anthropic` methods in Python allows you to wrap your Anthropic client in order to automatically log traces -- no decorator or function wrapping required! Using the wrapper ensures that messages, including tool calls and multimodal content blocks will be rendered nicely in LangSmith. The wrapper works seamlessly with the `@traceable` decorator or `traceable` function and you can use both in the same application.

<Note>
  The `LANGSMITH_TRACING` environment variable must be set to `'true'` in order for traces to be logged to LangSmith, even when using `wrap_anthropic`. This allows you to toggle tracing on and off without changing your code.

  Additionally, you will need to set the `LANGSMITH_API_KEY` environment variable to your API key (see [Setup](/) for more information).

  If your LangSmith API key is linked to multiple workspaces, set the `LANGSMITH_WORKSPACE_ID` environment variable to specify which workspace to use.

  By default, the traces will be logged to a project named `default`. To log traces to a different project, see [this section](/langsmith/log-traces-to-project).
</Note>

```python theme={null}
import anthropic
from langsmith import traceable
from langsmith.wrappers import wrap_anthropic

client = wrap_anthropic(anthropic.Anthropic())

# You can also wrap the async client as well
# async_client = wrap_anthropic(anthropic.AsyncAnthropic())

@traceable(run_type="tool", name="Retrieve Context")
def my_tool(question: str) -> str:
    return "During this morning's meeting, we solved all world conflict."

@traceable(name="Chat Pipeline")
def chat_pipeline(question: str):
    context = my_tool(question)
    messages = [
        { "role": "user", "content": f"Question: {question}\nContext: {context}"}
    ]
    messages = client.messages.create(
      model="claude-sonnet-4-5-20250929",
      messages=messages,
      max_tokens=1024,
      system="You are a helpful assistant. Please respond to the user's request only based on the given context."
    )
    return messages

chat_pipeline("Can you summarize this morning's meetings?")
```

***

<Callout icon="pen-to-square" iconType="regular">
  [Edit the source of this page on GitHub.](https://github.com/langchain-ai/docs/edit/main/src/langsmith/trace-anthropic.mdx)
</Callout>

<Tip icon="terminal" iconType="regular">
  [Connect these docs programmatically](/use-these-docs) to Claude, VSCode, and more via MCP for real-time answers.
</Tip>