# ChecksumMismatchError

> **Class** in `deepagents_code`

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

Raised when a downloaded archive fails SHA-256 verification.

Distinct from generic install failure so callers can surface a loud,
user-visible notice — a checksum mismatch is a supply-chain anomaly
(CDN poisoning, MITM, tampered mirror) and must not be silently
treated like "you're offline".

## Signature

```python
ChecksumMismatchError()
```

## Extends

- `Exception`

---

[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/e14e0adcbe78565ed3650e7f24b2a775d5437d25/libs/code/deepagents_code/managed_tools.py#L81)