langchain-ai

The agent engineering platform.

Build resilient agents.

The batteries-included agent harness.

The agent engineering platform

OpenWiki is a CLI that writes and maintains agent documentation for your codebase.

An Open-Source Asynchronous Coding Agent

Fully local web research and report writing assistant

📃 A better UX for chat, writing content, and coding with LLMs.

LangChain 🔌 MCP

Framework to build resilient language agents as graphs.

🦜💬 Web app for interacting with any LangGraph agent (PY & TS) via a chat interface.

📲 An agent for sourcing, curating, and scheduling social media posts with human-in-the-loop.

LangChain + Next.js starter template

Build an email assistant with human-in-the-loop and memory

LangServe 🦜️🏓

An open-source, no-code agent building platform.

Custom UI for Deep Agents

Reference implementations of several LangChain agents as Streamlit apps

The batteries included agent harness.

For your multi-agent needs

Readymade evaluators for your LLM apps

🦜⛏️ Did you say you like data?

📥 An inbox UX for interacting with human-in-the-loop agents.

This repo was archived on Oct 16, 2026. Python SDK moved to langchain-ai/langsmith-python and JS SDK to langchain-ai/langsmith-javascript.

Expose llms-txt to IDEs for development

LangGraph template for a simple ReAct agent

Readymade evaluators for agent trajectories

Learn about the fundamentals of LangGraph through a series of notebooks

Open-source design agent: on-brand stills, decks, diagrams, charts and motion graphics from a chat thread, built on Deep Agents.

Build LangGraph agents with large numbers of tools

LangChain-powered web researcher chatbot. Searches for sources on the web and cites them in generated answers.

REPO MOVED

Unified LangChain documentation.

🦜🔗 LangChain interfaces to Google's suite of AI products (e.g. Gemini & Vertex AI)

A collection of generative UI agents written with LangGraph.js

Build LangChain Applications on AWS

A managed RAG API server.

⚠️ No longer maintained, see linked issue

LangChain abstractions backed by Postgres Backend

Teach LangChain using LangChain!

LangGraph Studio template for creating an agent that does web research to genearte or enrich structured data.

** THIS REPO HAS MOVED TO https://github.com/langchain-ai/langchainjs/tree/main/libs/langchain-mcp-adapters ** Adapters for integrating Model Context Protocol (MCP) tools with LangChain.js...

Safely run untrusted Python code using Pyodide and Deno

An implementation of a computer use agent (CUA) using LangGraph

🧍‍♂️LLM as a manager for approval processes.

fullstack chat agent with authentication, request credits and payments built in

A general-purpose coding agent that runs inside an NVIDIA OpenShell sandbox, orchestrated by Deep Agents and powered by NVIDIA Nemotron. The agent writes and executes code in an isolated,...

The quickest way to get started building a LangGraph app

This repo is deprecated. Please go to langchain-ai/docs.

Resources for the LangSmith Academy Course

A bot with memory, built on LangGraph Cloud.

Build secure LangChain applications on Azure

Assistant for voice-to-blog writing

Integrations between MongoDB, Atlas, LangChain, and LangGraph

Open-source paid media agent for Google Ads, Meta Ads, Reddit, LinkedIn, X, and OpenAI Ads: analysis, reports, and reviewed changes, built on Deep Agents.

CLI for fetching LangSmith data