> ## Documentation Index
> Fetch the complete documentation index at: https://auth0.com/llms.txt
> Use this file to discover all available pages before exploring further.

# LangChain SDKs & Samples

> AI Identity for B2B LangChain & LangGraph SDKs make it easy for developers to integrate with and secure AI agent workflows using LangChain and LangGraph.

## JavaScript & TypeScript

### [Auth0 AI for LangChain](https://github.com/auth0/auth0-ai-js/tree/main/packages/ai-langchain)

This SDK provides building blocks for using AI Identity for B2B with [LangChain](https://www.langchain.com/) and [LangGraph](https://www.langchain.com/langgraph). It supports:

* A RAG Retriever for using OpenFGA
* Tools for implementing asynchronous user authentication
* Tools for getting access tokens for third-party connections
* [OpenFGA-based](https://openfga.dev/) tool authorizers

```bash wrap lines theme={null}
npm install @auth0/ai-langchain
```

## Python

### [Auth0 AI for LangChain](https://github.com/auth0/auth0-ai-python/tree/main/packages/auth0-ai-langchain)

This SDK provides building blocks for using AI Identity for B2B with LangChain and LangGraph. Includes a RAG Retriever for using OpenFGA, tools for implementing asynchronous user authentication, tools for getting access tokens for third-party connections, and OpenFGA-based tool authorizers. It supports:

* A RAG Retriever for using OpenFGA,
* Tools for getting access tokens for third-party connections,
* OpenFGA-based tool authorizers.

```bash wrap lines theme={null}
pip install auth0-ai-langchain
```

## Sample applications

Checkout our sample applications built with LangChain and LangGraph.

> **[Assistant0 (Next.js)](https://github.com/auth0-samples/auth0-assistant0/tree/main/ts-langchain)**
>
> A fullstack AI personal assistant with pre-configured tools that demonstrate different AI Identity for B2B features like User Authentication, Calling APIs (Gmail, Google Calendar, etc) securely using Token Vault, Human-in-the-loop interactions using Asynchronous Authorization, and using Auth0 FGA for securing RAG tools.

> **[Assistant0 (FastAPI)](https://github.com/auth0-samples/auth0-assistant0/tree/main/py-langchain)**
>
> A fullstack AI personal assistant with pre-configured tools that demonstrate different AI Identity for B2B features like User Authentication, Calling APIs (Gmail, Google Calendar, etc) securely using Token Vault, Human-in-the-loop interactions using Asynchronous Authorization, and using Auth0 FGA for securing RAG tools.

> **[AI Samples](https://github.com/auth0-samples/auth0-ai-samples)**
>
> Explore our repository of standalone sample applications that showcase
> Auth0's authentication and authorization capabilities in generative AI
> applications. Each sample demonstrates a specific AI Identity for B2B feature.

> **[Auth0 AI SDK TypeScript Samples](https://github.com/auth0/auth0-ai-js/tree/main/examples)**
>
> Explore example applications that accompany Auth0's JavaScript AI SDKs.
> These demonstrate recommended implementation patterns for the SDKs.

> **[Auth0 AI SDK Python Samples](https://github.com/auth0/auth0-ai-python/tree/main/examples)**
>
> Explore example applications that accompany Auth0's Python AI SDKs.
> These demonstrate recommended implementation patterns for the SDKs.

## Guides & Tutorials

Checkout our guides for LangChain and LangGraph in TypeScript and Python.

> **[Build an AI Assistant with LangGraph, Vercel, and Next.js: Use Gmail as a Tool Securely](https://auth0.com/blog/genai-tool-calling-build-agent-that-calls-gmail-securely-with-langgraph-vercelai-nextjs/)**

> **[Check Google Calendar Availability](https://auth0.com/ai/docs/how-tos/check-google-calendar-availability.md)**

> **[List GitHub Repositories](https://auth0.com/ai/docs/how-tos/list-github-repositories.md)**

> **[List Slack Channels](https://auth0.com/ai/docs/how-tos/list-slack-channels.md)**