What is the key difference between Kakunin Mcp and Kastell?

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

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

Kakunin Mcp 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?

Kakunin Mcp lists 3 tools with 2 views and 1 GitHub stars. Kastell lists 6 tools with 2 views and 56 GitHub stars.

Can I use both Kakunin Mcp 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 Kakunin Mcp 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 Kakunin Mcp and Kastell free to use, or do they require API keys?

Kakunin Mcp 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 Kakunin Mcp and Kastell at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both kakunin-ai-kakunin-mcp 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, Kakunin Mcp has a Quality Score of 51 /100 ( Good ) with 2 views, 0 installs, and 1 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

Kakunin Mcp vs Kastell

In-depth architectural comparison of the Kakunin Mcp 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

Kakunin Mcp

Security · Local stdio

Quality: 51/100 (Good) | Auth: API Key required

Kastell

Security · Local stdio

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

Verdict Summary: Choose Kakunin Mcp 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 Kakunin Mcp 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: KAKUNIN_API_KEY, KAKUNIN_AGENT_ID, KAKUNIN_BASE_URL.
Primary tools included: verify_agent_scope, check_risk_score, audit_log_append.

Explore Kakunin Mcp 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.
Primary tools included: 413 security checks in 29 categories, Automated safe fixes and 19-step production hardening, Compliance mapping to CIS, PCI-DSS, HIPAA.

Feature & Specification Comparison

Specification	Kakunin Mcp kakunin-ai Security	Kastell kastelldev Security
Summary	Compliance and identity for AI agents — verify an agent's certificate scope, read its behavioral risk score, and append to an immutable audit trail. X.509 identity issued via AWS KMS; MiCA / EU AI Act aligned. npx -y @kakunin/mcp	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

Kakunin Mcp Tools (3)

verify_agent_scope

Check whether this agent is authorised to perform an action before executing it. Verifies the active X.509 certificate, permitted_actions scope, financial limits, and revocation status.

check_risk_score

Retrieve the agent's rolling 30-day risk score, band (`low`/`medium`/`high`), drift trend, and actionable guidance. No input required.

audit_log_append

Append a behavioral event to the agent's immutable audit log. Returns risk score + transaction ID. Events scoring ≥ 0.85 auto-trigger a certificate revocation check.

Kastell Tools (6)

413 security checks in 29 categories

Automated safe fixes and 19-step production hardening

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).

Kakunin Mcp Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "kakunin-ai-kakunin-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@kakunin/mcp"
      ],
      "env": {
        "KAKUNIN_API_KEY": "YOUR_KAKUNIN_API_KEY_HERE",
        "KAKUNIN_AGENT_ID": "YOUR_KAKUNIN_AGENT_ID_HERE",
        "KAKUNIN_BASE_URL": "YOUR_KAKUNIN_BASE_URL_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

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

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