# Callbacks

> **Class** in `langchain_mcp_adapters`

📖 [View in docs](https://reference.langchain.com/python/langchain-mcp-adapters/callbacks/Callbacks)

Callbacks for the LangChain MCP client.

## Signature

```python
Callbacks(
    self,
    on_logging_message: LoggingMessageCallback | None = None,
    on_progress: ProgressCallback | None = None,
    on_elicitation: ElicitationCallback | None = None,
)
```

## Constructors

```python
__init__(
    self,
    on_logging_message: LoggingMessageCallback | None = None,
    on_progress: ProgressCallback | None = None,
    on_elicitation: ElicitationCallback | None = None,
) -> None
```

| Name | Type |
|------|------|
| `on_logging_message` | `LoggingMessageCallback \| None` |
| `on_progress` | `ProgressCallback \| None` |
| `on_elicitation` | `ElicitationCallback \| None` |


## Properties

- `on_logging_message`
- `on_progress`
- `on_elicitation`

## Methods

- [`to_mcp_format()`](https://reference.langchain.com/python/langchain-mcp-adapters/callbacks/Callbacks/to_mcp_format)

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[View source on GitHub](https://github.com/langchain-ai/langchain-mcp-adapters/blob/8f580f029fabd78891ea4dbfd1de3b1d9e4fa001/langchain_mcp_adapters/callbacks.py#L96)