langchain-ai/langchainjs
The agent engineering platform
Platform-specific configuration:
{
"mcpServers": {
"langchainjs": {
"command": "npx",
"args": [
"-y",
"langchainjs"
]
}
}
}Add the config above to .claude/settings.json under the mcpServers key.
<div align="center"> <a href="https://www.langchain.com/"> <picture> <source media="(prefers-color-scheme: light)" srcset=".github/images/logo-light.svg"> <source media="(prefers-color-scheme: dark)" srcset=".github/images/logo-dark.svg"> </picture> </a> </div>
<div align="center"> <h3>The agent engineering platform.</h3> </div>
[](https://opensource.org/licenses/MIT) [](https://x.com/langchain)
LangChain is a framework for building LLM-powered applications. It helps you chain together interoperable components and third-party integrations to simplify AI application development — all while future-proofing decisions as the underlying technology evolves.
Documentation: To learn more about LangChain, check out the docs.
If you're looking for more advanced customization or agent orchestration, check out LangGraph.js. our framework for building agents and controllable workflows.
> [!NOTE] > Looking for the Python version? Check out LangChain.
To help you ship LangChain apps to production faster, check out LangSmith. LangSmith is a unified developer platform for building, testing, and monitoring LLM applications.
You can use npm, pnpm, or yarn to install LangChain.js
npm install -S langchain or pnpm install langchain or yarn add langchain
LangChain helps developers build applications powered by LLMs through a standard interface for agents, mo
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