# RunMetadataPayload

> **Class** in `langgraph_sdk`

📖 [View in docs](https://reference.langchain.com/python/langgraph-sdk/schema/RunMetadataPayload)

Payload for the `metadata` control event.

## Signature

```python
RunMetadataPayload()
```

## Extends

- `TypedDict`

## Constructors

```python
__init__(
    run_id: str,
)
```

| Name | Type |
|------|------|
| `run_id` | `str` |


## Properties

- `run_id`

---

[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/d27d4b2d9895a4aa83170b4aaa135878f99c7fd6/libs/sdk-py/langgraph_sdk/schema.py#L723)