# PerplexitySearchRetriever

> **Class** in `langchain_perplexity`

📖 [View in docs](https://reference.langchain.com/python/langchain-perplexity/retrievers/PerplexitySearchRetriever)

Perplexity Search retriever.

## Signature

```python
PerplexitySearchRetriever()
```

## Extends

- `BaseRetriever`

## Properties

- `k`
- `max_tokens`
- `max_tokens_per_page`
- `country`
- `search_domain_filter`
- `search_recency_filter`
- `search_after_date`
- `search_before_date`
- `client`
- `pplx_api_key`

## Methods

- [`validate_environment()`](https://reference.langchain.com/python/langchain-perplexity/retrievers/PerplexitySearchRetriever/validate_environment)

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/f0c5a28fa05adcda89aebcb449d897245ab21fa4/libs/partners/perplexity/langchain_perplexity/retrievers.py#L13)