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mcp/harbor
LangChain

CTFd for LangChain

io.github.mrjamescot/ctfd-mcp-server

MCP server for CTFd v3: list challenges, submit flags, and query scoreboards via AI agents.

client:LangChain transport:stdio runtime:pypi

Install CTFd in LangChain

pip install langchain-mcp-adapters 

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "ctfd-mcp-server": {
            "transport": "stdio",
            "command": "uvx",
            "args": ["ctfd-mcp-server"],
        }
})

tools = await client.get_tools()

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

CTFd in other clients

CTFd MCP server