Atlas / MCP servers / hideya / Langchain MCP Tools

Langchain MCP ToolsCAUTION

Name: Langchain MCP Tools
Author: hideya

mcp/hideya/langchain-mcp-tools

MCP server by hideya · langchain · langchain python · mcp · Audited 2026-10-08

⚑ Report / re-scan Source ↗

MCP to LangChain Tools Conversion Utility / Python

Verdict

CAUTION

Grade

Trust score

87 /100

Exposed tools

9 7r · 2w · 0d

Transport

streamable-http

License

MIT

Stars

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

MCP to LangChain Tools Conversion Library / Python [](https://github.com/hideya/langchain-mcp-tools-py/blob/main/LICENSE) [](https://pypi.org/project/langchain-mcp-tools/) [](https://dependents.info/hideya/langchain-mcp-tools-py)

A simple, lightweight library to use Model Context Protocol (MCP) server tools from LangChain.

Project Status

This library currently supports MCP Protocol version 2025-03-26. It does not support the MCP 2026-07-28 specification.

For new projects, we recommend using LangChain's official LangChain MCP Adapters library, which provides comprehensive MCP integration for LangChain.

This project is now in maintenance / dormant mode. Existing users may continue using it with MCP servers compatible with the 2025-03-26 specification, but new MCP protocol features will not be actively implemented here.

Introduction

A simple, lightweight library to use Model Context Protocol (MCP) server tools from LangChain.

Its simplicity and extra features for local MCP servers can make it useful as a basis for your own customizations. However, it only supports text results of tool calls and does not support MCP features other than tools.

LangChain's **official LangChain MCP Adapters** library, which supports comprehensive integration with LangChain, has been released. You might want to consider using it if the extra features that this library supports are not neces

Read from source at commit 2a53d2d939bdOBSERVED · 2026-10-08

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.

claude-code

claude mcp add langchain-mcp-tools --env BRAVE_API_KEY=${BRAVE_API_KEY} --env GITHUB_PERSONAL_ACCESS_TOKEN=${GITHUB_PERSONAL_ACCESS_TOKEN} -- uvx langchain-mcp-tools

claude-desktop

{
  "mcpServers": {
    "langchain-mcp-tools": {
      "command": "uvx",
      "args": [
        "langchain-mcp-tools"
      ],
      "env": {
        "BRAVE_API_KEY": "${BRAVE_API_KEY}",
        "GITHUB_PERSONAL_ACCESS_TOKEN": "${GITHUB_PERSONAL_ACCESS_TOKEN}"
      }
    }
  }
}

Exposed tools (9)

7 read · 2 write · 0 destructive.

Tool	Risk	Description
`add`	write	Add two numbers together.
`authenticated_echo`	read	Echo back a message with authentication context.
`create_document`	write	Create a new document for the authenticated user.
`echo`	read
`get_current_user`	read	Get information about the currently authenticated user.
`get_user_info`	read	Get information about the authenticated user.
`greet`	read	Return a greeting message.
`hello`	read
`list_user_documents`	read	List documents accessible to the authenticated user.

Trust audit

CAUTIONgrade B · trust 87/100 Install with care. The audit found things worth knowing before you trust its output.

Layer	What it checks	Result
L0	Provenance & inventory	PASS
L1	Static analysis of the code	WARN
L2	Instruction surface (what it tells the agent)	PASS
L3	Class-specific surface	PASS
L4	Behavioural (sandbox)	SKIPPED

What the source does

Filesystem: none-observed
Network: declared (10 observation(s))
Shell: none-observed
Dependencies: pinned
Secrets in source: none-found

Findings (8)

MEDIUMInformation disclosure · disclose.log_secret · CWE-209, CWE-532

testfiles/sse_auth_test_server.py:349

print(f"Bearer {token}")

MEDIUMInformation disclosure · disclose.log_secret · CWE-209, CWE-532

testfiles/streamable_http_bearer_auth_test_client.py:119

print(f"🔑 Using token: {token[:50]}...")