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LangChain · Interface

VectorStore

VectorStore is a common interface for storing embedded documents and finding similar ones. It supports adding, deleting, filtering, and several similarity-search methods across different backends.

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Syntax

vector_store.similarity_search(query, k=4, filter=None)

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  • InMemoryVectorStore
  • VectorStoreRetriever
  • similarity_search
  • similarity_search_with_score
  • similarity_search_by_vector
  • max_marginal_relevance_search
  • add_documents
  • delete

Source: Vector store integrations - Docs by LangChain Documentation. Checked 2026-11-03.