# RetrieverInput

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/tools/retriever/RetrieverInput)

Input to the retriever.

## Signature

```python
RetrieverInput()
```

## Extends

- `BaseModel`

## Properties

- `query`

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/8fec4e7ceee2c368b068c49f9fed453276e210e7/libs/core/langchain_core/tools/retriever.py#L25)