This is a simple read-only Model Context Protocol server for NetBox. It enables you to interact with your data in NetBox directly via LLMs that support MCP.

Note: the set of supported object types is explicitly defined and limited to the core NetBox objects for now, and won't work with object types from plugins.

1. Create a read-only API token in NetBox with sufficient permissions for the tool to access the data you want to make available via MCP.

2. Install dependencies:

   # Using UV (recommended)
   uv sync
   
   # Or using pip
   pip install -e .

3. Verify the server can run: NETBOX_URL=https://netbox.example.com/ NETBOX_TOKEN=<your-api-token> uv run server.py

4. Add the MCP server to your LLM client. See below for some examples with Claude.

Add the server using the claude mcp add command:

claude mcp add --transport stdio netbox \
  --env NETBOX_URL=https://netbox.example.com/ \
  --env NETBOX_TOKEN=<your-api-token> \
  -- uv --directory /path/to/netbox-mcp-server run server.py

Important notes:

• Replace /path/to/netbox-mcp-server with the absolute path to your local clone
• The -- separator distinguishes Claude Code flags from the server command
• Use --scope project to share the configuration via .mcp.json in version control
• Use --scope user to make it available across all your projects (default is local)

After adding, verify with /mcp in Claude Code or claude mcp list in your terminal.

For HTTP transport, first start the server manually:

# Start the server with HTTP transport (using .env or environment variables)
NETBOX_URL=https://netbox.example.com/ \
NETBOX_TOKEN=<your-api-token> \
TRANSPORT=http \
uv run server.py

Then add the running server to Claude Code:

# Add the HTTP MCP server (note: URL must include http:// or https:// prefix)
claude mcp add --transport http netbox http://127.0.0.1:8000/mcp

Important notes:

• The URL must include the protocol prefix (http:// or https://)
• The default endpoint is /mcp when using HTTP transport
• The server must be running before Claude Code can connect
• Verify the connection with claude mcp list - you should see a ✓ next to the server name

Add the server configuration to your Claude Desktop config file. On Mac, edit ~/Library/Application Support/Claude/claude_desktop_config.json:

{
    "mcpServers": {
        "netbox": {
            "command": "uv",
            "args": [
                "--directory",
                "/path/to/netbox-mcp-server",
                "run",
                "server.py"
            ],
            "env": {
                "NETBOX_URL": "https://netbox.example.com/",
                "NETBOX_TOKEN": "<your-api-token>"
            }
        }
    }
}

On Windows, use full, escaped path to your instance, such as C:\\Users\\myuser\\.local\\bin\\uv and C:\\Users\\myuser\\netbox-mcp-server. For detailed troubleshooting, consult the MCP quickstart.

5. Use the tools in your LLM client. For example:

> Get all devices in the 'Equinix DC14' site
...
> Tell me about my IPAM utilization
...
> What Cisco devices are in my network?
...
> Who made changes to the NYC site in the last week?
...
> Show me all configuration changes to the core router in the last month

Both netbox_get_objects() and netbox_get_object_by_id() support an optional fields parameter to reduce token usage:

# Without fields: ~5000 tokens for 50 devices
devices = netbox_get_objects('devices', {'site': 'datacenter-1'})

# With fields: ~500 tokens (90% reduction)
devices = netbox_get_objects(
    'devices',
    {'site': 'datacenter-1'},
    fields=['id', 'name', 'status', 'site']
)

Common field patterns:

• Devices: ['id', 'name', 'status', 'device_type', 'site', 'primary_ip4']
• IP Addresses: ['id', 'address', 'status', 'dns_name', 'description']
• Interfaces: ['id', 'name', 'type', 'enabled', 'device']
• Sites: ['id', 'name', 'status', 'region', 'description']

The fields parameter uses NetBox's native field filtering. See the NetBox API documentation for details.

The server supports multiple configuration sources with the following precedence (highest to lowest):

1. Command-line arguments (highest priority)
2. Environment variables
3. .env file in the project root
4. Default values (lowest priority)

For local Claude Desktop or Claude Code usage with stdio transport:

{
    "mcpServers": {
        "netbox": {
            "command": "uv",
            "args": ["--directory", "/path/to/netbox-mcp-server", "run", "server.py"],
            "env": {
                "NETBOX_URL": "https://netbox.example.com/",
                "NETBOX_TOKEN": "<your-api-token>"
            }
        }
    }
}

For web-based MCP clients using HTTP/SSE transport:

# Using environment variables
export NETBOX_URL=https://netbox.example.com/
export NETBOX_TOKEN=<your-api-token>
export TRANSPORT=http
export HOST=127.0.0.1
export PORT=8000

uv run server.py

# Or using CLI arguments
uv run server.py \
  --netbox-url https://netbox.example.com/ \
  --netbox-token <your-api-token> \
  --transport http \
  --host 127.0.0.1 \
  --port 8000

Create a .env file in the project root:

# Core NetBox Configuration
NETBOX_URL=https://netbox.example.com/
NETBOX_TOKEN=your_api_token_here

# Transport Configuration (optional, defaults to stdio)
TRANSPORT=stdio

# HTTP Transport Settings (only used if TRANSPORT=http)
# HOST=127.0.0.1
# PORT=8000

# Security (optional, defaults to true)
VERIFY_SSL=true

# Logging (optional, defaults to INFO)
LOG_LEVEL=INFO

All configuration options can be overridden via CLI arguments:

uv run server.py --help

# Common examples:
uv run server.py --log-level DEBUG --no-verify-ssl  # Development
uv run server.py --transport http --port 9000       # Custom HTTP port

Contributions are welcome! Please open an issue or submit a PR.

This project is licensed under the Apache 2.0 license. See the LICENSE file for details.