OPNsense Guard

io.github.d3ltasecurity/opnsense-guard-mcp · v0.1.1

Safety-first OPNsense firewall MCP: read-only by default, planned and auto-reverting writes.

Source code Set it up

Connect Runs on your machine

Terminal

claude mcp add opnsense-guard-mcp -e OPNSENSE_URL=<OPNSENSE_URL> -e OPNSENSE_API_KEY=<OPNSENSE_API_KEY> -e OPNSENSE_API_SECRET=<OPNSENSE_API_SECRET> -e OPNSENSE_CA_BUNDLE=<OPNSENSE_CA_BUNDLE> -- uvx opnsense-guard-mcp==0.1.1

claude_desktop_config.json

{
  "mcpServers": {
    "opnsense-guard-mcp": {
      "command": "uvx",
      "args": [
        "opnsense-guard-mcp==0.1.1"
      ],
      "env": {
        "OPNSENSE_URL": "<OPNSENSE_URL>",
        "OPNSENSE_API_KEY": "<OPNSENSE_API_KEY>",
        "OPNSENSE_API_SECRET": "<OPNSENSE_API_SECRET>",
        "OPNSENSE_CA_BUNDLE": "<OPNSENSE_CA_BUNDLE>"
      }
    }
  }
}

~/.cursor/mcp.json

{
  "mcpServers": {
    "opnsense-guard-mcp": {
      "command": "uvx",
      "args": [
        "opnsense-guard-mcp==0.1.1"
      ],
      "env": {
        "OPNSENSE_URL": "<OPNSENSE_URL>",
        "OPNSENSE_API_KEY": "<OPNSENSE_API_KEY>",
        "OPNSENSE_API_SECRET": "<OPNSENSE_API_SECRET>",
        "OPNSENSE_CA_BUNDLE": "<OPNSENSE_CA_BUNDLE>"
      }
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "opnsense-guard-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "opnsense-guard-mcp==0.1.1"
      ],
      "env": {
        "OPNSENSE_URL": "<OPNSENSE_URL>",
        "OPNSENSE_API_KEY": "<OPNSENSE_API_KEY>",
        "OPNSENSE_API_SECRET": "<OPNSENSE_API_SECRET>",
        "OPNSENSE_CA_BUNDLE": "<OPNSENSE_CA_BUNDLE>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

Name	Description
`OPNSENSE_URL` Required	Firewall base URL, e.g. https://firewall.example.internal
`OPNSENSE_API_KEY` Required, secret	API key of a least-privilege read user
`OPNSENSE_API_SECRET` Required, secret	API secret of the read user
`OPNSENSE_CA_BUNDLE` Optional	CA file for a self-signed firewall certificate

Details

Package	`[email protected]` (PYPI, stdio)
First published	27 Oct 2026
Last updated	27 Oct 2026
Registry name	`io.github.d3ltasecurity/opnsense-guard-mcp`

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Live status

Local install

Installed and run on your own machine, so there is no public endpoint to check.

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