What is the key difference between Kastell and Mcp Server?

Kastell belongs to the Security category with local stdio execution, while Mcp Server belongs to the Security category with local stdio execution.

How do I install Kastell or Mcp Server 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 Kastell and Mcp Server free or paid?

Kastell operates under a Free / Open Source model (No auth required). Mcp Server operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Kastell lists 6 tools with 2 views and 56 GitHub stars. Mcp Server lists 5 tools with 0 views and 6 GitHub stars.

Can I use both Kastell and Mcp Server 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.

How do I install Kastell or Mcp Server in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are Kastell and Mcp Server free to use, or do they require API keys?

Kastell is listed under a Free / Open Source model with No auth required . Mcp Server operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both Kastell and Mcp Server at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both kastelldev-kastell and rad-security-mcp-server as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, Kastell has a Quality Score of 48 /100 ( Fair ) with 2 views, 0 installs, and 56 GitHub stars. Mcp Server holds a Quality Score of 51 /100 ( Fair ) with 0 views, 0 installs, and 6 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Kastell vs Mcp Server

In-depth architectural comparison of the Kastell and Mcp Server 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

Kastell

Security · Local stdio

Quality: 48/100 (Fair) | Auth: No auth required

Mcp Server

Security · Local stdio

Quality: 51/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Kastell if you need specialized Security tools running via a local process. Choose Mcp Server 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 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).
You have access to required keys: KASTELL_API_KEY, KASTELL_PROVIDER_TOKEN, KASTELL_SSH_KEY_PATH, KASTELL_CONFIG_PATH.
Primary tools included: 413 security checks in 29 categories, Automated safe fixes and 19-step production hardening, Compliance mapping to CIS, PCI-DSS, HIPAA.

Explore Kastell Details

Choose Mcp Server 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: Streamable HTTP transport with bearer token authentication, Supports querying RAD Security API for findings and reports, No server-side credential storage; authenticates each request.

Explore Mcp Server Details

Feature & Specification Comparison

Specification	Kastell kastelldev Security	Mcp Server rad-security Security
Summary	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.	MCP server for RAD Security, providing AI-powered security insights for Kubernetes and cloud environments. This server provides tools for querying the Rad Security API and retrieving security findings, reports, runtime data and many more.
Category & Scope	Security	Security
Quality signal	48/100 (Fair)	51/100 (Fair)
Transport Protocol	Local Subprocess (stdio)	Local Subprocess (stdio)
Auth Requirement	No auth required	No auth required
Pricing Model	Free / Open Source	Free / Open Source
Required Env Vars	`KASTELL_API_KEYKASTELL_PROVIDER_TOKENKASTELL_SSH_KEY_PATHKASTELL_CONFIG_PATH`	None required
Compatible Clients	Claude DesktopCursorWindsurfClineVS Code	Claude DesktopCursorWindsurfClineVS Code
Install path signal	`npx · low`	`npx · high`
Engagement & Health	2 views 0 copies 0 upvotes 56 stars	0 views 0 copies 0 upvotes 6 stars
Verified / Official	Community Listing	Community Listing
Open full listing	View Kastell Listing	View Mcp Server Listing

Tools & Capabilities Breakdown

Kastell Tools (6)

413 security checks in 29 categories

Automated safe fixes and 19-step production hardening

Compliance mapping to CIS, PCI-DSS, HIPAA

Fleet management with multi-server support

Built-in MCP server with 17 AI tools

Support for Hetzner, DigitalOcean, Vultr, Linode

Mcp Server Tools (5)

Streamable HTTP transport with bearer token authentication

Supports querying RAD Security API for findings and reports

No server-side credential storage; authenticates each request

Compatible with multiple MCP clients and AI tools

Hosted endpoint available to avoid self-hosting

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).

Kastell Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "kastelldev-kastell": {
      "command": "npx",
      "args": [
        "-y",
        "kastelldev-kastell"
      ],
      "env": {
        "KASTELL_API_KEY": "YOUR_KASTELL_API_KEY_HERE",
        "KASTELL_PROVIDER_TOKEN": "YOUR_KASTELL_PROVIDER_TOKEN_HERE",
        "KASTELL_SSH_KEY_PATH": "YOUR_KASTELL_SSH_KEY_PATH_HERE",
        "KASTELL_CONFIG_PATH": "YOUR_KASTELL_CONFIG_PATH_HERE"
      }
    }
  }
}

Mcp Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "rad-security-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/inspector"
      ]
    }
  }
}

Frequently Asked Questions

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

More alternatives to Kastell More alternatives to Mcp Server Security category hub