What is langchain-documentation-server?

A local server that gives a coding assistant access to LangChain documentation. LangChain is a software framework for building applications with language models.

Use it to look up LangChain concepts, APIs, and usage details from an MCP-compatible coding assistant.

It reduces the need to search documentation manually while working with LangChain code.

langchain-documentation-server — MCP server by LiteObject

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/LiteObject/langchain-mcp-server

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/mcp/liteobject/langchain-mcp-server/langchain-documentation-server/github.svg)](https://agentmods.dev/mcp/liteobject/langchain-mcp-server/langchain-documentation-server)

Your own site

<a href="https://agentmods.dev/mcp/liteobject/langchain-mcp-server/langchain-documentation-server"><img src="https://agentmods.dev/badge/mcp/liteobject/langchain-mcp-server/langchain-documentation-server/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/mcp/liteobject/langchain-mcp-server/langchain-documentation-server"><img src="https://agentmods.dev/badge/mcp/liteobject/langchain-mcp-server/langchain-documentation-server.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Security

Grade A, and why

langchain-documentation-server scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

listed in the official MCP registry · 8 lines

The source is not reproduced here

No licence file

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 8 lines scan A a9e2a83ed8bc

Subscribe to this mod's changes

langchain-documentation-server is an MCP server published in the GitHub repository LiteObject/langchain-mcp-server (1 stars, last pushed 10mo ago), with no licence file. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Data and AI ai ai-agent fastapi mcp mcp-server modelcontextprotocol

repo-rag

Local RAG indexer and MCP server for AI coding agents (Claude, GPT, Gemini, Cursor, Factory Droid, and more). Runs locally from the repo-rag Python package.

ManavK003/repo-aware-code-rag · not measured

context-compose

Orchestrate complex AI interactions with Context Compose. A powerful CLI and server for building, validating, and managing context for large language models using the Model Context Protocol (MCP). Runs locally from the @noanswer/context-compose npm package.

lazylagom/context-compose-mcp · not measured

booksapi

MCP server "booksapi" as configured in SepulvedaRafael/booksapi-mcp. Runs locally from the booksapi Python package.

SepulvedaRafael/booksapi-mcp · not measured

haiku-rag

Local-first agentic RAG with citations - hybrid search, reranking and multimodal retrieval over your own documents, no database server required. Runs locally from the haiku-rag Python package.

ggozad/haiku.rag · not measured

mcp-local-rag

Easy-to-setup local RAG server with minimal configuration. Runs locally from the mcp-local-rag npm package. Needs 8 environment variables to run.

shinpr/mcp-local-rag · not measured

prism-mcp

Persistent session memory for AI coding agents that never leaves your machine — including the on-device model that reasons over it. Restores your prior decisions, open TODOs, and changed files across sessions; adds associative recall of related past work. Runs locally from the prism-mcp-server npm package. Needs 1…

dcostenco/prism-coder · not measured