MCP server for CTFd v3: list challenges, submit flags, and query scoreboards via AI agents.
Connect Runs on your machine
claude mcp add ctfd-mcp-server -e CTFD_BASE_URL=<CTFD_BASE_URL> -e CTFD_ADMIN_TOKEN=<CTFD_ADMIN_TOKEN> -e CTFD_SESSION_COOKIE=<CTFD_SESSION_COOKIE> -e CTFD_USERNAME=<CTFD_USERNAME> -e CTFD_PASSWORD=<CTFD_PASSWORD> -e CTFD_HTTP_TIMEOUT=<CTFD_HTTP_TIMEOUT> -- uvx ctfd-mcp-server==1.0.4{
"mcpServers": {
"ctfd-mcp-server": {
"command": "uvx",
"args": [
"ctfd-mcp-server==1.0.4"
],
"env": {
"CTFD_BASE_URL": "<CTFD_BASE_URL>",
"CTFD_ADMIN_TOKEN": "<CTFD_ADMIN_TOKEN>",
"CTFD_SESSION_COOKIE": "<CTFD_SESSION_COOKIE>",
"CTFD_USERNAME": "<CTFD_USERNAME>",
"CTFD_PASSWORD": "<CTFD_PASSWORD>",
"CTFD_HTTP_TIMEOUT": "<CTFD_HTTP_TIMEOUT>"
}
}
}
}{
"mcpServers": {
"ctfd-mcp-server": {
"command": "uvx",
"args": [
"ctfd-mcp-server==1.0.4"
],
"env": {
"CTFD_BASE_URL": "<CTFD_BASE_URL>",
"CTFD_ADMIN_TOKEN": "<CTFD_ADMIN_TOKEN>",
"CTFD_SESSION_COOKIE": "<CTFD_SESSION_COOKIE>",
"CTFD_USERNAME": "<CTFD_USERNAME>",
"CTFD_PASSWORD": "<CTFD_PASSWORD>",
"CTFD_HTTP_TIMEOUT": "<CTFD_HTTP_TIMEOUT>"
}
}
}
}{
"servers": {
"ctfd-mcp-server": {
"type": "stdio",
"command": "uvx",
"args": [
"ctfd-mcp-server==1.0.4"
],
"env": {
"CTFD_BASE_URL": "<CTFD_BASE_URL>",
"CTFD_ADMIN_TOKEN": "<CTFD_ADMIN_TOKEN>",
"CTFD_SESSION_COOKIE": "<CTFD_SESSION_COOKIE>",
"CTFD_USERNAME": "<CTFD_USERNAME>",
"CTFD_PASSWORD": "<CTFD_PASSWORD>",
"CTFD_HTTP_TIMEOUT": "<CTFD_HTTP_TIMEOUT>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
CTFD_BASE_URLRequired | Root URL of the CTFd v3 instance, e.g. https://ctf.example.com (without /api/v1) |
CTFD_ADMIN_TOKENOptional, secret | CTFd API access token (preferred authentication method) |
CTFD_SESSION_COOKIEOptional, secret | Full CTFd session cookie, e.g. session=abc... |
CTFD_USERNAMEOptional | Username for CTFd form login |
CTFD_PASSWORDOptional, secret | Password for CTFd form login |
CTFD_HTTP_TIMEOUTOptional | Per-request HTTP timeout in seconds (default 15) |
Details
| Package | [email protected] (PYPI, stdio) |
| First published | 21 Sep 2026 |
| Last updated | 21 Sep 2026 |
| Registry name | io.github.MrJamescot/ctfd-mcp-server |
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