# is_async_callable

> **Function** in `langgraph`

📖 [View in docs](https://reference.langchain.com/python/langgraph/_internal/_runnable/is_async_callable)

Check if a function is async.

## Signature

```python
is_async_callable(
    func: Any,
) -> TypeGuard[Callable[..., Awaitable]]
```

---

[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/644815f9e5bc52ad8f7a5227a456227e9c3e639b/libs/langgraph/langgraph/_internal/_runnable.py#L528)