AgentValet vs Kastell

In-depth architectural comparison of the AgentValet 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.

Which MCP Server Should You Choose?

Choose AgentValet 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: AGENT_ID, OWNER_ID, PROXY_URL, AGENT_PRIVATE_KEY_PATH.
• Primary tools included: Per-agent RS256 cryptographic identity with SPIFFE URIs, 60-second signed JWTs for each request, Deny-by-default granular scope grants per agent/platform/action.

Explore AgentValet 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.

Feature & Specification Comparison

Specification	AgentValet AgentValet Security	Kastell kastelldev Security
Summary	Identity and credential governance broker for MCP servers. Issues scoped, short-lived credentials per agent to stop credential inheritance. Audit log, human approval gates, AIMS-aligned.	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

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).

{
  "mcpServers": {
    "agentvalet-agentvalet": {
      "command": "npx",
      "args": [
        "-y",
        "@agentvalet/register"
      ],
      "env": {
        "AGENT_ID": "YOUR_AGENT_ID_HERE",
        "OWNER_ID": "YOUR_OWNER_ID_HERE",
        "PROXY_URL": "YOUR_PROXY_URL_HERE",
        "AGENT_PRIVATE_KEY_PATH": "YOUR_AGENT_PRIVATE_KEY_PATH_HERE"
      }
    }
  }
}

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

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