What is the key difference between Opnsense MCP and Shield?

Opnsense MCP belongs to the Security category with local stdio execution, while Shield belongs to the Security category with local stdio execution.

How do I install Opnsense MCP or Shield 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 Opnsense MCP and Shield free or paid?

Opnsense MCP operates under a Free / Open Source model (API Key required). Shield operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Opnsense MCP lists 6 tools with 4 views and 10 GitHub stars. Shield lists 6 tools with 4 views and 11 GitHub stars.

Can I use both Opnsense MCP and Shield 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.

Side-by-Side Model Context Protocol Comparison

Opnsense MCP vs Shield

In-depth architectural comparison of the Opnsense MCP and Shield 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

Opnsense MCP

Security · Local stdio

Quality: 47/100 (Fair) | Auth: API Key required

Shield

Security · Local stdio

Quality: 63/100 (Good) | Auth: No auth required

Verdict Summary: Choose Opnsense MCP if you need specialized Security tools running via a local process. Choose Shield 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 Opnsense MCP when:

You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Free / Open Source).
You have access to required keys: OPNSENSE_API_KEY, OPNSENSE_API_SECRET, OPNSENSE_FIREWALL_HOST, MCP_SECRET_KEY.
Primary tools included: OPNsense API access over MCP, STDIO and SSE deployment modes, Streamable HTTP support.

Explore Opnsense MCP Details

Choose Shield 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: Pre-execution MCP call guardrails, TOFU tool-catalog pinning, Tool description and result scanning.

Feature & Specification Comparison

Specification	Opnsense MCP coreyhines Security	Shield AperionAI Security
Summary	OPNsense firewall operations via API. Query ARP, DHCP, firewall rules, logs, interfaces, system status, and packet capture via STDIO or SSE.	Local guardrail proxy for AI coding agents. Wraps any MCP server (stdio or Streamable HTTP) and blocks destructive tool calls — DROP TABLE, rm -rf, force-push — before they execute. MCP supply-chain protection: TOFU tool-catalog pinning against rug pulls, plus tool-description and tool-result scanning for tool poisoning and prompt injection. 51 starter rules, approval gates, audit logging. Single binary, Apache-2.0.
Category & Scope

Tools & Capabilities Breakdown

Opnsense MCP Tools (6)

OPNsense API access over MCP

STDIO and SSE deployment modes

Streamable HTTP support

Firewall rule inspection and mutation

ARP, DHCP, LLDP, log, and interface queries

Packet capture and system monitoring

Shield Tools (6)

Pre-execution MCP call guardrails

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).

Opnsense MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "coreyhines-opnsense-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "coreyhines-opnsense-mcp"
      ],
      "env": {
        "OPNSENSE_API_KEY": "YOUR_OPNSENSE_API_KEY_HERE",
        "OPNSENSE_API_SECRET": "YOUR_OPNSENSE_API_SECRET_HERE",
        "OPNSENSE_FIREWALL_HOST": "YOUR_OPNSENSE_FIREWALL_HOST_HERE",
        "MCP_SECRET_KEY": "YOUR_MCP_SECRET_KEY_HERE"
      }
    }
  }
}

Shield Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "aperionai-shield": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-postgres"
      ]
    }
  }
}

Frequently Asked Questions

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

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