# LangSmithLookupError

> **Class** in `deepagents_code`

📖 [View in docs](https://reference.langchain.com/python/deepagents-code/config/LangSmithLookupError)

Base class for typed LangSmith project URL lookup failures.

Concrete subclasses (`LangSmithImportError`, `LangSmithLookupTimeoutError`,
`LangSmithApiError`) let interactive callers like `/trace` show the user
the actual cause instead of collapsing every failure into a generic
"could not reach LangSmith" message.

## Signature

```python
LangSmithLookupError()
```

## Extends

- `Exception`

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[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/2069079e09546060f5b52b2cd4f0e3c813e820f3/libs/code/deepagents_code/config.py#L5265)