What is the key difference between Opnsense MCP and Beelzebub?

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

How do I install Opnsense MCP or Beelzebub 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 Beelzebub free or paid?

Opnsense MCP operates under a Free / Open Source model (API Key required). Beelzebub 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. Beelzebub lists 6 tools with 4 views and 2,182 GitHub stars.

Can I use both Opnsense MCP and Beelzebub 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 Beelzebub

In-depth architectural comparison of the Opnsense MCP and Beelzebub 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

Beelzebub

Security · Local stdio

Quality: 52/100 (Good) | Auth: No auth required

Verdict Summary: Choose Opnsense MCP if you need specialized Security tools running via a local process. Choose Beelzebub 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 Beelzebub 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: MCP, SSH, HTTP, TCP, and TELNET decoys, YAML service definitions with regex matching, OpenAI and Ollama response generation.

Feature & Specification Comparison

Specification	Opnsense MCP coreyhines Security	Beelzebub mariocandela Security
Summary	OPNsense firewall operations via API. Query ARP, DHCP, firewall rules, logs, interfaces, system status, and packet capture via STDIO or SSE.	Beelzebub is a honeypot framework that lets you build honeypot tools using MCP. Its purpose is to detect prompt injection or malicious agent behavior. The underlying idea is to provide the agent with tools it would never use in its normal work.
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

Beelzebub Tools (6)

MCP, SSH, HTTP, TCP, and TELNET decoys

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"
      }
    }
  }
}

Beelzebub Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mariocandela-beelzebub": {
      "command": "npx",
      "args": [
        "-y",
        "mariocandela-beelzebub"
      ]
    }
  }
}

Frequently Asked Questions

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

More alternatives to Opnsense MCP More alternatives to Beelzebub Security category hub