CTFd MCP Server: Install & Setup

Install CTFd in Claude Code

Claude Code

claude mcp add ctfd -e CTFD_BASE_URL=... -- uvx ctfd-mcp-server

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "ctfd": {
      "command": "uvx",
      "args": [
        "ctfd-mcp-server"
      ],
      "env": {
        "CTFD_BASE_URL": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the CTFd MCP server do?

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

Is the CTFd MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does CTFd run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add CTFd to Claude Code?

Run: claude mcp add ctfd -e CTFD_BASE_URL=... -- uvx ctfd-mcp-server

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