# LangChain

{% hint style="warning" %}
**Private preview.** This surface is not yet generally available. Adapters live in the Python SDK today and the rendering / configuration UX is under iteration. Contact <support@layerlens.ai> to request access to the private preview.
{% endhint %}

Wrap your chain with a Stratix callback. See the [cookbook recipe](/6.-build-wire-your-code/instrument-langchain.md).

```python
from layerlens import Stratix
from langchain_core.callbacks import BaseCallbackHandler

client = Stratix()

class StratixCallback(BaseCallbackHandler):
 def on_chain_end(self, outputs, **kwargs):
 client.traces.create(...)

chain.invoke(input, config={"callbacks": [StratixCallback()]})
```

## See also

* [Cookbook: instrument LangChain](/6.-build-wire-your-code/instrument-langchain.md)


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