> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-zh.cn/llms.txt
> Use this file to discover all available pages before exploring further.

# 检索器集成

> 使用 LangChain JavaScript 与检索器集成。

[检索器](/oss/javascript/langchain/retrieval) 是一种接口，它能够根据非结构化查询返回文档。
它比向量存储更为通用。
检索器不需要具备存储文档的能力，只需能够返回（或检索）文档即可。

检索器接受字符串查询作为输入，并返回一个 `Document` 对象列表。

关于如何使用检索器的具体细节，请参阅[相关操作指南](/oss/javascript/langchain/retrieval)。

请注意，所有[向量存储](/oss/javascript/integrations/vectorstores)都可以[转换为检索器](/oss/javascript/langchain/retrieval)。
可用的向量存储检索器请参考向量存储[集成文档](/oss/javascript/integrations/vectorstores/)。

## 所有检索器

<Columns cols={3}>
  <Card title="Alchemyst AI 检索器" icon="link" href="/oss/javascript/integrations/retrievers/alchemystai-retriever" arrow="true" cta="查看指南" />

  <Card title="ArxivRetriever" icon="link" href="/oss/javascript/integrations/retrievers/arxiv-retriever" arrow="true" cta="查看指南" />

  <Card title="Azion EdgeSQL" icon="link" href="/oss/javascript/integrations/retrievers/azion-edgesql" arrow="true" cta="查看指南" />

  <Card title="Amazon Bedrock 知识库" icon="link" href="/oss/javascript/integrations/retrievers/bedrock-knowledge-bases" arrow="true" cta="查看指南" />

  <Card title="BM25" icon="link" href="/oss/javascript/integrations/retrievers/bm25" arrow="true" cta="查看指南" />

  <Card title="Chaindesk 检索器" icon="link" href="/oss/javascript/integrations/retrievers/chaindesk-retriever" arrow="true" cta="查看指南" />

  <Card title="Dria 检索器" icon="link" href="/oss/javascript/integrations/retrievers/dria" arrow="true" cta="查看指南" />

  <Card title="Exa" icon="link" href="/oss/javascript/integrations/retrievers/exa" arrow="true" cta="查看指南" />

  <Card title="HyDE 检索器" icon="link" href="/oss/javascript/integrations/retrievers/hyde" arrow="true" cta="查看指南" />

  <Card title="Amazon Kendra 检索器" icon="link" href="/oss/javascript/integrations/retrievers/kendra-retriever" arrow="true" cta="查看指南" />

  <Card title="Metal 检索器" icon="link" href="/oss/javascript/integrations/retrievers/metal-retriever" arrow="true" cta="查看指南" />

  <Card title="Supabase 混合搜索" icon="link" href="/oss/javascript/integrations/retrievers/supabase-hybrid" arrow="true" cta="查看指南" />

  <Card title="Tavily 搜索 API" icon="link" href="/oss/javascript/integrations/retrievers/tavily" arrow="true" cta="查看指南" />

  <Card title="时间加权检索器" icon="link" href="/oss/javascript/integrations/retrievers/time-weighted-retriever" arrow="true" cta="查看指南" />

  <Card title="Vespa 检索器" icon="link" href="/oss/javascript/integrations/retrievers/vespa-retriever" arrow="true" cta="查看指南" />

  <Card title="Zep Cloud 检索器" icon="link" href="/oss/javascript/integrations/retrievers/zep-cloud-retriever" arrow="true" cta="查看指南" />

  <Card title="Zep 开源检索器" icon="link" href="/oss/javascript/integrations/retrievers/zep-retriever" arrow="true" cta="查看指南" />
</Columns>

<Info>
  如果您想贡献一个集成，请参阅[贡献集成](/oss/javascript/contributing#add-a-new-integration)。
</Info>

***

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