langchain MCP Server

by doc2mcp Your server? Claim it

not responding

langchain is listed as active in the registry but did not answer our last check. Last commit 2 Aug 2026.

MCP server for langchain documentation, generated by doc2mcp.

Uptime history 47 days of history · worst day 7%

47 days agonow

27.2%

Uptime 24h

25 of 92 checks

—

Tools

hidden behind auth

835 ms

Response time

average over 24h

Stars

last commit 2 Aug 2026

What the code does

We read the source, 22 h ago · rules 3dff92dd89df

In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

CI pipeline leaks secrets outward .github/workflows/doc2mcp-sync.example.yml:18

          curl -fsS -X POST "${{ secrets.DOC2MCP_SYNC_URL }}" \

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

langchain does not always answer

Over the last week it answered 32.2% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add langchain --transport http https://doc2mcp.site/api/mcp/0cd2635e-0cd5-4712-b33c-13b10c547e42/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "langchain": {
      "url": "https://doc2mcp.site/api/mcp/0cd2635e-0cd5-4712-b33c-13b10c547e42/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.langchain]
url = "https://doc2mcp.site/api/mcp/0cd2635e-0cd5-4712-b33c-13b10c547e42/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "langchain": {
      "url": "https://doc2mcp.site/api/mcp/0cd2635e-0cd5-4712-b33c-13b10c547e42/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "langchain": {
      "url": "https://doc2mcp.site/api/mcp/0cd2635e-0cd5-4712-b33c-13b10c547e42/mcp"
    }
  }
}

Endpoints

URL	Transport	State	Latency	Checked
https://doc2mcp.site/api/mcp/0cd2635e-0cd5-4712-b33c-13b10c547e42/mcp	streamable-http	answering	83 ms	4 min ago

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langchain — questions

Answers built from our own checks of this server.

Is langchain working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 25 of 92 checks got a reply (27.2%), average response time 835 ms. The bar chart above shows every period we have measured.

The registry lists langchain as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect langchain?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does langchain need an API key?

No. langchain completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. This is what we observed, not what the docs claim.

How fast is langchain?

It answers our handshake in 835 ms on average, which is faster than 12% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is langchain open source?

Yes — it is published under the MIT licence, written in TypeScript, 5 stars on GitHub and 83 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.