> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/guardrails/v0.24.0/integration-with-third-party-libraries/langchain/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/guardrails/_mcp/server.

# LangChain Frameworks

> Integrate NeMo Guardrails with LangChain chains, runnables, and LangGraph workflows.

This section covers how to integrate the NeMo Guardrails library with LangChain and LangGraph.

## LangChain

## LangGraph

> Integrate NeMo Guardrails with LangChain chains, runnables, and LangGraph workflows.

## Docs

- [LangChain Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/integration-with-third-party-libraries/langchain/langchain-integration.md): Add guardrails to LangChain chains or use chains as actions inside guardrails configurations.
- [Agent Middleware](https://docs.nvidia.com/nemo/guardrails/v0.24.0/integration-with-third-party-libraries/langchain/agent-middleware.md): Add guardrails to LangChain agents using the GuardrailsMiddleware for automatic input and output safety checks on every model call.
- [RunnableRails](https://docs.nvidia.com/nemo/guardrails/v0.24.0/integration-with-third-party-libraries/langchain/runnable-rails.md): Use RunnableRails to wrap LLMs and chains with guardrails using the Runnable Protocol.
- [Add Guardrails to a LangChain Chain](https://docs.nvidia.com/nemo/guardrails/v0.24.0/integration-with-third-party-libraries/langchain/chain-with-guardrails.md): Protect LangChain chains from jailbreak attempts using input rails and RunnableRails.
- [Use a Runnable as an Action in Guardrails](https://docs.nvidia.com/nemo/guardrails/v0.24.0/integration-with-third-party-libraries/langchain/runnable-as-action.md): Register LangChain Runnables as actions and invoke them from Colang flows.
- [LangGraph Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/integration-with-third-party-libraries/langchain/langgraph-integration.md): Build safe multi-agent workflows with LangGraph and NeMo Guardrails protection.