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Firewall

Verified Integration
Author: @awilmoth•Category: ServerApplication
GitHub Repository
JSON-RPC 2.0
Protocol Standard
Sub-second
Execution Latency
Active
Operational Status
Tags:#Claude#Search#Database#API#Git#AI#GitHub#Node.js#Docker

Client Configuration

— Connect Firewall to Claude Desktop or Cursor in seconds
{
  "mcpServers": {
    "firewall": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-firewall"
      ],
      "env": {}
    }
  }
}
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
Architecture & Capabilities

System Overview

Filters text data with a powerful rules engine to protect data and enforce policies when using Large Language Models.

Indexed Date

7/23/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Firewall

Firewall supports pattern matching using regular expressions or plain text. You can create rules for sensitive information like SSNs and credit card numbers, or define custom rules to enforce specific policies. Replacement and transformation are also supported.

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