What is the key difference between Cybersec Toolkit and Kastell?

Cybersec Toolkit belongs to the Security category with local stdio execution, while Kastell belongs to the Security category with local stdio execution.

How do I install Cybersec Toolkit or Kastell in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Cybersec Toolkit and Kastell free or paid?

Cybersec Toolkit operates under a Free / Open Source model (No auth required). Kastell operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Cybersec Toolkit lists 6 tools with 0 views and 66 GitHub stars. Kastell lists 6 tools with 4 views and 60 GitHub stars.

Can I use both Cybersec Toolkit and Kastell together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Cybersec Toolkit vs Kastell

In-depth architectural comparison of the Cybersec Toolkit and Kastell MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Cybersec Toolkit

Security · Local stdio

Quality: 43/100 (Fair) | Auth: No auth required

Kastell

Security · Local stdio

Quality: 63/100 (Good) | Auth: No auth required

Verdict Summary: Choose Cybersec Toolkit if you need specialized Security tools running via a local process. Choose Kastell if your workspace requires Security integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Cybersec Toolkit when:

You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: 670+ security tools across 18 modules, 15 MCP tools for discovery and execution, Kata Containers sandbox by default.

Explore Cybersec Toolkit Details

Choose Kastell when:

You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Server security audits with remediation, SSH hardening and fail2ban setup, UFW firewall management.

Explore Kastell Details

Feature & Specification Comparison

Specification	Cybersec Toolkit Security	Kastell kastelldev Security
Summary	Authorization-gated MCP server to discover and run 670+ security tools for CTF, pentest, and DFIR.	Server security auditing and hardening toolkit. 413 security checks across 29 categories (SSH, Firewall, Docker, TLS, HTTP Headers), CIS/PCI-DSS/HIPAA compliance mapping, 19-step production hardening, fleet management, and forensic evidence collection. Supports Hetzner, DigitalOcean, Vultr, and Linode. 13 MCP tools.
Category & Scope	Security

Tools & Capabilities Breakdown

Cybersec Toolkit Tools (6)

670+ security tools across 18 modules

15 MCP tools for discovery and execution

Kata Containers sandbox by default

Allowlist and argument validation

Private-network target policy by default

872 Agent Skills for security workflows

Kastell Tools (6)

Server security audits with remediation

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Cybersec Toolkit Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "cybersec-toolkit": {
      "command": "uvx",
      "args": [
        "pwntools"
      ]
    }
  }
}

Kastell Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "kastelldev-kastell": {
      "command": "npx",
      "args": [
        "-y",
        "kastell"
      ]
    }
  }
}

Frequently Asked Questions

Cybersec Toolkit is categorized under Security and uses a local stdio subprocess. In contrast, Kastell belongs to Security using local stdio subprocess. Select Cybersec Toolkit when you need capabilities focused on security and Kastell when you require tools for security.

More alternatives to Cybersec Toolkit More alternatives to Kastell Security category hub