What is the key difference between Mcp Server and Kastell?

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

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

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

Which MCP server has more tools and community activity?

Mcp Server lists 6 tools with 3 views and 3 GitHub stars. Kastell lists 6 tools with 2 views and 56 GitHub stars.

Can I use both Mcp Server 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.

How do I install Mcp Server or Kastell 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 Mcp Server and Kastell free to use, or do they require API keys?

Mcp Server is listed under a Freemium model with API Key required . Kastell 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 Mcp Server and Kastell at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both datanexusmcp-mcp-server and kastelldev-kastell 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, Mcp Server has a Quality Score of 43 /100 ( Fair ) with 3 views, 0 installs, and 3 GitHub stars. Kastell holds a Quality Score of 52 /100 ( Good ) with 2 views, 0 installs, and 56 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Mcp Server vs Kastell

In-depth architectural comparison of the Mcp Server 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

Mcp Server

Security · Local stdio

Quality: 43/100 (Fair) | Auth: API Key required

Kastell

Security · Local stdio

Quality: 52/100 (Good) | Auth: No auth required

Verdict Summary: Choose Mcp Server 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 Mcp Server when:

You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Freemium).
You have access to required keys: X_DATANEXUS_KEY.
Primary tools included: Live CVE details with EPSS exploitation probabilities, SBOM vulnerability scanning across multiple package ecosystems, License compliance checks for open source packages.

Explore Mcp Server 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).
You have access to required keys: KASTELL_API_KEY, KASTELL_PROVIDER_TOKEN, KASTELL_SSH_KEY_PATH, KASTELL_CONFIG_PATH.

Feature & Specification Comparison

Specification	Mcp Server datanexusmcp Security	Kastell kastelldev Security
Summary	55 tools for verified public data lookups — CVE/SBOM security audits, licence compliance, patents, federal contracts, NPI provider lookups, nonprofit 990 filings, and domain intelligence. No API key required.	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

Tools & Capabilities Breakdown

Mcp Server Tools (6)

Live CVE details with EPSS exploitation probabilities

SBOM vulnerability scanning across multiple package ecosystems

License compliance checks for open source packages

Domain RDAP and ownership intelligence

Nonprofit 990 filings and federal contract lookups

API key management tools with free tier and usage tracking

Kastell Tools (6)

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).

Mcp Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "datanexusmcp-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "datanexusmcp-mcp-server"
      ],
      "env": {
        "X_DATANEXUS_KEY": "YOUR_X_DATANEXUS_KEY_HERE"
      }
    }
  }
}

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"
      }
    }
  }
}

Frequently Asked Questions

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

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