How do I use domain-mcp?

1. Click on "Install Server". 2. Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state. 3. In the chat, type @ followed by the MCP server name and your instructions, e.g., "@domain-mcp Check if 'zenith' is available across tech TLDs like .io and .ai" That's it! The server will respond to your query, and you can continue using it as needed. Here is a step-by-step guide with screenshots.

domain-mcp

A CLI and MCP (Model Context Protocol) server for reliably checking domain name availability. Uses both DNS and WHOIS lookups for high-confidence results.

Features

Dual verification: Combines DNS and WHOIS checks for reliable results
Confidence levels: Reports high/medium/low confidence based on verification methods
Alternative TLD search: Find available domains across multiple TLDs
Domain suggestions: Generate variations with common prefixes/suffixes
MCP server: Use with Claude and other MCP-compatible AI assistants
CLI tool: Command-line interface for quick lookups

Installation

# Install globally from GitHub npm install -g github:cfenzo/domain-mcp # Or use directly with npx (no install needed) npx github:cfenzo/domain-mcp --help

CLI Usage

# Check a single domain domain-check example.com # Check across popular TLDs domain-check myapp --alt # Check tech-focused TLDs (io, dev, app, ai, etc.) domain-check startup --alt --tech # Check specific TLDs domain-check mybrand --tlds com,io,dev,app # JSON output domain-check example.com --json # Only show available domains domain-check myapp --alt --available-only

Or with npx (no installation):

npx -p github:cfenzo/domain-mcp domain-check example.com --alt

Claude Code MCP Server

Add to your Claude Code configuration (~/.claude.json):

{ "mcpServers": { "domain-checker": { "command": "npx", "args": ["-y", "-p", "github:cfenzo/domain-mcp", "domain-mcp"] } } }

Available MCP Tools

check_domain: Check a single domain's availability
check_alternative_tlds: Check availability across multiple TLDs
suggest_domains: Generate and check domain name variations
list_tlds: List available TLD categories

How It Works

DNS Check: Queries DNS for A records. If found, domain is definitely taken.
WHOIS Check: Queries WHOIS servers for registration data.
Confidence Scoring:
- High: Both methods agree (DNS exists + WHOIS registered, or no DNS + WHOIS available)
- Medium: Only one method provided data
- Low: Errors or ambiguous results

TLD Categories

General: com, net, org, io, co, dev, app, ai, xyz, me, info, biz, tech, online, site, cloud
Tech: io, dev, app, ai, tech, cloud, software, systems, digital, code
Country: uk, de, fr, nl, es, it, pl, ru, jp, cn, au, ca, us, in, br