# TracerSession

> **Class** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/schemas/TracerSession)

TracerSession schema for the API.

Sessions are also referred to as "Projects" in the UI.

## Signature

```python
TracerSession(
    self,
    _host_url: Optional[str] = None,
    **kwargs: Any = {},
)
```

## Extends

- `BaseModel`

## Constructors

```python
__init__(
    self,
    _host_url: Optional[str] = None,
    **kwargs: Any = {},
) -> None
```

| Name | Type |
|------|------|
| `_host_url` | `Optional[str]` |


## Properties

- `id`
- `start_time`
- `end_time`
- `description`
- `name`
- `extra`
- `tenant_id`
- `reference_dataset_id`
- `url`
- `metadata`
- `tags`

---

[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/6a74bf5af9e542d8065af8edca54b2448f430916/python/langsmith/schemas.py#L701)