---
title: "LangChain: MCP vendor profile | Agent MCP Directory"
description: "LangChain: SDK or framework. Products: MCPAdapter (langchain.mcp). 6 dated facts, prices and two checks, each sourced, read 5 November 2026."
canonical: https://agentmcpdirectory.com/vendors/langchain
site: "Agent MCP Directory"
last_updated: 2026-11-05
section: "Vendors"
---

# LangChain: MCP vendor profile | Agent MCP Directory

> LangChain: SDK or framework. Products: MCPAdapter (langchain.mcp). 6 dated facts, prices and two checks, each sourced, read 5 November 2026.

Source: https://agentmcpdirectory.com/vendors/langchain
Site: Agent MCP Directory
Last reviewed: 2026-11-05

# LangChain: MCP vendor profile

LangChain connects its agents to MCP servers through MCPAdapter, built on FastMCP, which discovers a server's tools and adapts them into LangChain tools; the older langchain-mcp-adapters package remains on GitHub, as documented by the vendor. The langchain.mcp namespace requires langchain\[mcp\] 1.4.0 or later and is in beta; importing it raises a LangChainBetaWarning once per process (docs.langchain.com).

## At a glance

| Listed as | LangChain (MCPAdapter, langchain-mcp-adapters) |
| --- | --- |
| Type | SDKs and frameworks |
| Home | docs.langchain.com |
| Price | open source |
| Read | 5 November 2026 |

## What it does for this layer

LangChain's MCPAdapter is built on FastMCP, which handles transport inference, protocol negotiation, connection management and authentication ([docs.langchain.com](https://docs.langchain.com/oss/python/langchain/mcp)). MCPAdapter infers the transport from its target: an in-process FastMCP server, a local script over stdio, or a remote URL ([docs.langchain.com](https://docs.langchain.com/oss/python/langchain/mcp)). LangChain warns that a string target must be an http or https URL, because a string naming an existing .py or .js file would be launched as a subprocess ([docs.langchain.com](https://docs.langchain.com/oss/python/langchain/mcp)).

The earlier langchain-mcp-adapters package converts MCP tools into LangChain tools for LangGraph agents; the repository is MIT licensed with about 3.6k stars on 5 Nov 2026 ([github.com](https://github.com/langchain-ai/langchain-mcp-adapters)). LangChain runs a public docs MCP server at https://docs.langchain.com/mcp ([docs.langchain.com](https://docs.langchain.com/oss/python/langchain/mcp)).

## Products and plans

| Product | What it does | Price |
| --- | --- | --- |
| MCPAdapter (langchain.mcp) | Client adapter that turns MCP server tools into LangChain tools. | open source; from 0 USD (source, as of 5 November 2026) |

## Checks on its own domain

| Check | Domain | Result | Scanned | Method |
| --- | --- | --- | --- | --- |
| Ora cached score | langchain.com | 74 of 100, grade B | 17 October 2026 | how it was taken |
| Cloudflare agent-readiness scan | langchain.com | 7 of 100, L0 Not Ready; 1 of 15 counted checks passed | 5 November 2026 | how it was taken |

## What it does not do

-   LangChain's MCPAdapter is a client-side adapter; it does not host MCP servers.

## Related on this site

Type

-   [SDKs and frameworks](https://agentmcpdirectory.com/vendors/by-type/sdk-or-framework/)

Section

-   [All vendors](https://agentmcpdirectory.com/vendors/)

Edition

4 November 2026

Method

[How rows are verified](https://agentmcpdirectory.com/method/)

Data

[CSV and JSON](https://agentmcpdirectory.com/data/)

Markdown

[This page as markdown](https://agentmcpdirectory.com/vendors/langchain/index.md)

## Sources

-   [Model Context Protocol (MCP) - Docs by LangChain](https://docs.langchain.com/oss/python/langchain/mcp), read 5 November 2026
-   [GitHub - langchain-ai/langchain-mcp-adapters](https://github.com/langchain-ai/langchain-mcp-adapters), read 5 November 2026

Last reviewed 5 November 2026