Castellan

Verified Integration

Author: @generating•Category: ServerApplication

GitHub Repository

JSON-RPC 2.0

Protocol Standard

Sub-second

Execution Latency

Active

Operational Status

Client Configuration

— Connect Castellan to Claude Desktop or Cursor in seconds

{
  "mcpServers": {
    "castellan": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-castellan"
      ],
      "env": {}
    }
  }
}

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Architecture & Capabilities

System Overview

Generate comprehensive threat models, DREAD risk scores, attack trees, and compliance mappings directly from system specifications or Infrastructure-as-Code.

Indexed Date

7/22/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Castellan

Castellan generates STRIDE (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, Elevation of Privilege) and LINDDUN (privacy) threats. It also calculates DREAD risk scores (0-10) for each threat, derived from structural facts and declared controls, and generates attack trees.

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