# gcs_mount

> **Function** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/sandbox/_mounts/gcs_mount)

Build a GCS-backed sandbox mount specification.

## Signature

```python
gcs_mount(
    *,
    id: str,
    mount_path: str,
    bucket: str,
    prefix: str | None = None,
    read_only: bool | None = None,
    cache: MountCacheConfig | None = None,
) -> GCSMountSpec
```

---

[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/33995e14a84c53b65b82482b3d2fe0624b379bda/python/langsmith/sandbox/_mounts.py#L258)