Device42 MCP Server

MCP server for Device42 IT asset management - Node.js/TypeScript implementation.

Features

• Zero install: Run directly with npx device42-mcp
• Fast: Uses native fetch (Node 18+), no heavy HTTP libs
• Type-safe: Full TypeScript
• Minimal deps: Only @modelcontextprotocol/sdk and zod
• Read/Write modes: Set D42_READONLY=false to enable write operations
• DOQL Support: Execute complex queries using Device42's powerful query language

Example Questions

Once configured, you can ask your AI assistant questions like:

Basic Queries

• "List all devices in the NYC datacenter"
• "What's the IP address of server web-prod-01?"
• "Show me all devices running Ubuntu"
• "Which devices are in rack A-15?"
• "Find all devices tagged as 'production'"

Network & IP Management

• "What IPs are available in the 10.0.1.0/24 subnet?"
• "Show me all IPs assigned to the database servers"
• "List all VLANs in building HQ"
• "What subnet is 192.168.1.50 in?"

Infrastructure Overview

• "Give me a summary of all racks in the London datacenter"
• "How many devices do we have per operating system?"
• "List all buildings and their room counts"
• "What hardware models are we using?"

DOQL Queries (Advanced)

The server supports DOQL (Device42 Object Query Language), enabling complex cross-table queries:

• "Run a DOQL query to find all devices with more than 64GB RAM that were added in the last 30 days"
• "Use DOQL to get a report of devices grouped by department and service level"
• "Query for all virtual machines and their host relationships"
• "Find devices where the warranty expires in the next 90 days"

Example DOQL the AI might generate:

SELECT d.name, d.ram, d.first_added 
FROM view_device_v1 d 
WHERE d.ram > 65536 
AND d.first_added > NOW() - INTERVAL '30 days'

Quick Start

No installation required. Just add to your MCP client config:

Cursor (npx)

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "device42": {
      "command": "npx",
      "args": ["-y", "device42-mcp"],
      "env": {
        "D42_URL": "https://your-device42.com",
        "D42_USERNAME": "api-user",
        "D42_PASSWORD": "api-password",
        "D42_VERIFY_SSL": "true",
        "D42_READONLY": "true"
      }
    }
  }
}

Cursor (Docker)

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "device42": {
      "command": "docker",
      "args": [
        "run", "-i", "--rm",
        "-e", "D42_URL=https://your-device42.com",
        "-e", "D42_USERNAME=api-user",
        "-e", "D42_PASSWORD=api-password",
        "-e", "D42_VERIFY_SSL=true",
        "-e", "D42_READONLY=true",
        "killcity/device42-mcp:latest"
      ]
    }
  }
}

Claude Desktop (npx)

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "device42": {
      "command": "npx",
      "args": ["-y", "device42-mcp"],
      "env": {
        "D42_URL": "https://your-device42.com",
        "D42_USERNAME": "api-user",
        "D42_PASSWORD": "api-password",
        "D42_VERIFY_SSL": "true",
        "D42_READONLY": "true"
      }
    }
  }
}

Claude Desktop (Docker)

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "device42": {
      "command": "docker",
      "args": [
        "run", "-i", "--rm",
        "-e", "D42_URL=https://your-device42.com",
        "-e", "D42_USERNAME=api-user",
        "-e", "D42_PASSWORD=api-password",
        "-e", "D42_VERIFY_SSL=true",
        "-e", "D42_READONLY=true",
        "killcity/device42-mcp:latest"
      ]
    }
  }
}

Alternative Installation Methods

Global Install

npm install -g device42-mcp
device42-mcp

From Source

git clone https://github.com/killcity/device42-mcp.git
cd device42-mcp
npm install
npm run build
node dist/index.js

Docker (standalone)

docker pull killcity/device42-mcp:latest

docker run -i --rm \
  -e D42_URL="https://your-device42.com" \
  -e D42_USERNAME="user" \
  -e D42_PASSWORD="pass" \
  -e D42_VERIFY_SSL="true" \
  -e D42_READONLY="true" \
  killcity/device42-mcp:latest

Or build locally:

docker build -t device42-mcp:latest .

Environment Variables

Variable	Required	Default	Description
D42_URL	Yes	-	Device42 instance URL
D42_USERNAME	Yes	-	API username
D42_PASSWORD	Yes	-	API password
D42_VERIFY_SSL	No	true	Verify SSL certificates
D42_READONLY	No	true	Only expose read operations

Available Tools

Read Operations

• list_devices, get_device, get_device_by_name, search_devices
• list_ips, get_ip, search_ips_by_device
• list_subnets, get_subnet
• list_racks, get_rack
• list_rooms, get_room
• list_buildings, get_building
• list_vlans, get_vlan
• list_software, get_software
• list_business_apps, get_business_app
• list_app_components, get_app_component
• list_hardware_models, list_operating_systems, list_vendors
• doql_query - Execute raw DOQL queries for complex data retrieval

Write Operations (when D42_READONLY=false)

• create_device, update_device
• assign_ip_to_device, release_ip
• create_subnet, create_rack, create_room, create_building

Development

# Run in dev mode
npm run dev

# Build
npm run build

# Run built version
npm start

License

MIT