# register_serde_event_listener

> **Function** in `langgraph.checkpoint`

📖 [View in docs](https://reference.langchain.com/python/langgraph.checkpoint/serde/event_hooks/register_serde_event_listener)

Register a listener for serde allowlist events.

## Signature

```python
register_serde_event_listener(
    listener: SerdeEventListener,
) -> Callable[[], None]
```

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[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/398d6cc59d4cf81ab23c09f037e9f521c3fedcd6/libs/checkpoint/langgraph/checkpoint/serde/event_hooks.py#L26)