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mcp/harbor
LangChain

HOL Guard for LangChain

io.github.hashgraph-online/hol-guard

Local-first AI agent security evidence and approval workflows through HOL Guard's stdio MCP server.

client:LangChain transport:stdio runtime:pypi

Install HOL Guard in LangChain

pip install langchain-mcp-adapters 

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "hol-guard": {
            "transport": "stdio",
            "command": "uvx",
            "args": ["hol-guard"],
        }
})

tools = await client.get_tools()

get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs

HOL Guard in other clients

HOL Guard MCP server