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LangChain

once for LangChain

io.github.aurumflux20/once-kernel

Run a side effect exactly once under retries, redelivery, and concurrent workers.

client:LangChain transport:stdio runtime:pypi

Install once in LangChain

pip install langchain-mcp-adapters

from langchain_mcp_adapters.client import MultiServerMCPClient

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

tools = await client.get_tools()

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

once in other clients