ctfd-mcp MCP Server

MCP server that lets a regular CTFd user list challenges, read details, start/stop dynamic docker instances, and submit flags.

Local serverstdio

What is the ctfd-mcp Server?

ctfd-mcp is an MCP project maintained in the umbra2728/ctfd-mcp repository. The maintainer describes its purpose as “MCP server that lets a regular CTFd user list challenges, read details, start/stop dynamic docker instances, and submit flags”. Read the project documentation for the complete scope.

Installation

The documented pypi package is ctfd-mcp. The configuration below comes from the maintainer’s example; adapt its paths and account values to your environment.

Configuration values

The example declares CTFD_URL, CTFD_TOKEN. Secret-looking values have been replaced with placeholders. Required and optional labels are shown only when the documentation states them.

Source

Project documentation · Repository · Discovery listing. This profile records the public documentation checked on 2026-10-08.

How to install the ctfd-mcp Server

{
  "mcpServers": {
    "ctfd-mcp": {
      "command": "uvx",
      "args": [
        "ctfd-mcp"
      ],
      "env": {
        "CTFD_URL": "https://ctfd.example.com",
        "CTFD_TOKEN": "YOUR_CTFD_TOKEN"
      }
    }
  }
}

From the project documentation. Replace placeholders and example paths before connecting.

Configuration

Variable	Description	Required
CTFD_URL	Declared in the maintainer’s client configuration.	Check documentation
CTFD_TOKEN	Declared in the maintainer’s client configuration.	Check documentation