Exa is a knowledge API for AI and developers.

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Installation and Setup

Exa integration exists in its own partner package. You can install it with: 
%pip install -qU langchain-exa
In order to use the package, you will also need to set the EXA_API_KEY environment variable to your Exa API key.

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Retriever

You can use the ExaSearchRetriever in a standard retrieval pipeline. You can import it as follows. See a usage example. 
from langchain_exa import ExaSearchRetriever

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Tools

You can use Exa as an agent tool as described in the Exa tool calling docs. See a usage example.

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ExaFindSimilarResults

A tool that queries the Metaphor Search API and gets back JSON. 
from langchain_exa.tools import ExaFindSimilarResults

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ExaSearchResults

Exa Search tool. 
from langchain_exa.tools import ExaSearchResults