NetBox MCP Server

A comprehensive read-only FastMCP server that exposes NetBox API functionality to AI systems via the Model Context Protocol (MCP).

Overview

This project implements a read-only MCP server that provides comprehensive tools to interact with NetBox infrastructure data. It enables natural language queries about network devices, sites, circuits, VLANs, and IP prefixes, making it easier for AI assistants to retrieve and present network infrastructure information without allowing any modifications to the NetBox data.

Features

Device Management

Query NetBox devices using structured filters
Search for devices by specific name
Use natural language to ask about devices
Support for filtering by site, role, status, manufacturer, and more

Site Operations

List all available sites with status and region information
Get comprehensive site details including device and rack counts
Site-based filtering across all resource types

Circuit Management

Query circuits by provider, type, status, and termination sites
Search circuits using natural language
Track circuit terminations (A-side and Z-side)
Filter by circuit ID patterns

IP Prefix Management

Query IP prefixes by site, VRF, tenant, status, and role
Support for both IPv4 and IPv6 address families
VLAN association and filtering
Prefix pool management
CIDR notation pattern matching

VLAN Management

Query VLANs by name, VID (VLAN ID), site, group, tenant, role, and status
True substring matching for VLAN names and descriptions
Cross-field search across VLAN properties
Support for VLAN group and tenant organization

Natural Language Processing

Intelligent parsing of natural language queries into structured API calls
Fuzzy matching for sites, roles, providers, and circuit types
Cross-field search capabilities
User-friendly error messages and suggestions

Example Queries

Device Queries

"Show me all devices at site SF1"
"List all active firewalls"
"Tell me about device sf1.as1"
"Find all ION devices"
"Show switches at NYC location"

Site Queries

"List all available sites"
"Tell me about site SF1"
"Show site information for Denver"

Circuit Queries

"Show me circuits from Zayo"
"List Internet circuits at SF1"
"Find circuit CID-12345"
"Show active MPLS circuits"

IP Prefix Queries

"Show IPv4 prefixes at SF1"
"List all /24 subnets"
"Find prefixes in VLAN 100"
"Show prefix pools"

VLAN Queries

"Show me VLAN 100"
"List all VLANs at site SF1"
"Find VLANs with '90' in the name"
"Show active VLANs for tenant ABC"
"Get all production VLANs"

Installation

Using uvx (Recommended)

The easiest way to use this MCP server is with uvx:

# Install and run with environment variables
uvx --from . \
  --with-editable . \
  --env NETBOX_URL=https://your-netbox.example.com \
  --env NETBOX_TOKEN=your_api_token \
  --env NETBOX_SSL_VERIFY=true \
  netbox-mcp-server

Development Setup

For development and testing:

Clone the repository:

git clone https://github.com/yourusername/netbox-mcp.git
cd netbox-mcp

Install in development mode:

uv venv
source .venv/bin/activate  # On Windows: .venv\Scripts\activate
uv pip install -e .

Set environment variables:

export NETBOX_URL=https://your-netbox.example.com
export NETBOX_TOKEN=your_api_token
export NETBOX_SSL_VERIFY=true

Claude Desktop Configuration

Add this to your Claude Desktop MCP configuration:

{
  "mcpServers": {
    "netbox": {
      "command": "uvx",
      "args": [
        "--from", "git+https://github.com/yourusername/netbox-mcp.git",
        "--with-editable", ".",
        "netbox-mcp-server"
      ],
      "env": {
        "NETBOX_URL": "https://your-netbox.example.com",
        "NETBOX_TOKEN": "your_api_token",
        "NETBOX_SSL_VERIFY": "true"
      }
    }
  }
}

Testing with MCPTools

For development and testing, use MCPTools:

# List all available tools 
mcp tools uv run --directory src python server.py

# Call a specific tool with parameters
mcp call get_device --params '{"name":"my-device-01"}' uv run --directory src python server.py

# Start interactive testing shell
mcp shell uv run --directory src python server.py

# View server logs during testing
mcp tools --server-logs uv run --directory src python server.py

Configuration

The server requires the following environment variables:

NETBOX_URL: URL of your NetBox instance (e.g., https://netbox.example.com)
NETBOX_TOKEN: API token with appropriate permissions
NETBOX_SSL_VERIFY: Whether to verify SSL certificates (true/false)
DEBUG: Enable debug mode (true/false)
LOG_LEVEL: Logging level (info, debug, warning, error)

Project Structure

netbox-mcp/
├── src/
│   ├── server.py          # Main MCP server implementation
│   ├── tools/             # Tool definitions
│   │   ├── devices.py     # Device-related tools
│   │   ├── sites.py       # Site-related tools
│   │   ├── circuits.py    # Circuit-related tools
│   │   ├── prefixes.py    # IP prefix-related tools
│   │   └── vlans.py       # VLAN-related tools
│   ├── models/            # Pydantic models
│   │   ├── device.py      # Device-related models
│   │   ├── site.py        # Site-related models
│   │   ├── circuit.py     # Circuit-related models
│   │   ├── prefix.py      # IP prefix-related models
│   │   └── vlan.py        # VLAN-related models
│   └── config/            # Configuration
│       └── netbox.py      # NetBox client configuration
├── docs/                  # Documentation
└── tests/                 # Test files

License

MIT License

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.