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 91 days of history · worst day 0%

91 days agonow

0.0%

Uptime 24h

0 of 91 checks

—

Tools

hidden behind auth

115 ms

Response time

average over 24h

Stars

last commit 2 Aug 2026

What the code does

We read the source, 2 d ago · rules 995398eba69f

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 0.0% 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 10 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

Settings → Connectors → Add custom connector, then paste this address

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

{
  "servers": {
    "langchain": {
      "type": "http",
      "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	115 ms	10 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 0 of 91 checks got a reply (0.0%), average response time 115 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 in the form 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.

Is langchain open source?

The code is open source: it is published under the MIT licence, written in TypeScript, 6 stars on GitHub and 83 open issues. The licence covers the code in the repository, not the hosted service at doc2mcp.site, which runs on its operator's own terms.