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Security

Kastell

io.github.kastelldev/kastell · v1.14.0

Server security audit (413 checks), hardening, and fleet management across 4 cloud providers.

Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add kastell -e HETZNER_TOKEN=<HETZNER_TOKEN> -e DIGITALOCEAN_TOKEN=<DIGITALOCEAN_TOKEN> -e VULTR_TOKEN=<VULTR_TOKEN> -e LINODE_TOKEN=<LINODE_TOKEN> -- npx -y [email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "kastell": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "HETZNER_TOKEN": "<HETZNER_TOKEN>",
        "DIGITALOCEAN_TOKEN": "<DIGITALOCEAN_TOKEN>",
        "VULTR_TOKEN": "<VULTR_TOKEN>",
        "LINODE_TOKEN": "<LINODE_TOKEN>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "kastell": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "HETZNER_TOKEN": "<HETZNER_TOKEN>",
        "DIGITALOCEAN_TOKEN": "<DIGITALOCEAN_TOKEN>",
        "VULTR_TOKEN": "<VULTR_TOKEN>",
        "LINODE_TOKEN": "<LINODE_TOKEN>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "kastell": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "HETZNER_TOKEN": "<HETZNER_TOKEN>",
        "DIGITALOCEAN_TOKEN": "<DIGITALOCEAN_TOKEN>",
        "VULTR_TOKEN": "<VULTR_TOKEN>",
        "LINODE_TOKEN": "<LINODE_TOKEN>"
      }
    }
  }
}

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

NameDescription
HETZNER_TOKEN
Optional, secret		Hetzner Cloud API token (optional — only for Hetzner servers)
DIGITALOCEAN_TOKEN
Optional, secret		DigitalOcean API token (optional — only for DigitalOcean servers)
VULTR_TOKEN
Optional, secret		Vultr API token (optional — only for Vultr servers)
LINODE_TOKEN
Optional, secret		Linode API token (optional — only for Linode servers)

Details

Package[email protected] (NPM, stdio)
First published24 Mar 2026
Last updated24 Mar 2026
Registry nameio.github.kastelldev/kastell

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