🏷️ MCP Domain Availability Checker [Python - Domain APIs - Claude Desktop]

MCP Domain Availability Checker is a Model Context Protocol integration that provides Claude Desktop with domain availability checking capabilities across 50+ popular TLD extensions. This utility combines DNS resolution and WHOIS lookup methods to deliver accurate domain availability status with smart TLD suggestions.

Demo

Video Timestamps:

• 00:00 - Checking google.com availability
• 00:20 - Testing myawesomesite.com
• 00:40 - Verifying techstartup2026.io
• 01:00 - Analyzing aitools domain

Key Features:

• Comprehensive Domain Checking: Verify availability across 50+ popular TLD extensions including .com, .io, .ai, .dev, .app
• Multi-Method Verification: Combines DNS resolution and WHOIS lookup for accurate results
• Smart TLD Organization: Results categorized by Popular TLDs, Country TLDs, and New TLDs
• Bulk Domain Checking: Check multiple extensions for a single domain name simultaneously
• Parallel Processing: Efficient concurrent domain queries with rate limiting
• Performance Metrics: Detailed timing information for each domain check
• Natural Language Integration: Seamless interaction through Claude Desktop’s conversational interface

Technical Overview:

• Python Backend: Built with Python 3.10+ using async/await for concurrent processing
• Model Context Protocol (MCP): Direct integration with Claude Desktop through uvx package management
• DNS & WHOIS APIs: Dual verification system using multiple resolution methods
• Socket Fallback: Alternative checking method when primary services are unavailable
• Rate Limiting: Intelligent semaphore-based concurrent request management
• TLD Categorization: Organized support for Popular, Country, and New TLD extensions
• Zero-Clone Installation: Direct deployment without repository cloning

Installation Guide:

Prerequisites:

# Install uv package manager
curl -LsSf https://astral.sh/uv/install.sh | sh

# Or via Homebrew
brew install uv

Via Smithery:

npx -y @smithery/cli install @imprvhub/mcp-domain-availability --client claude

Manual Configuration:

{
  "mcpServers": {
    "mcp-domain-availability": {
      "command": "uvx",
      "args": [
        "--python=3.10",
        "--from",
        "git+https://github.com/imprvhub/mcp-domain-availability",
        "mcp-domain-availability"
      ]
    }
  }
}

Available Commands:

The Domain Availability Checker provides a single tool with flexible usage patterns:

• check_domain: Main domain checking function with --domain flag
  • mysite.com --domain - Check specific domain with exact TLD
  • mysite --domain - Check domain across all supported TLDs
  • test.io --domain - Verify specific extension plus alternatives

Supported TLD Categories:

Popular TLDs (12): .com, .net, .org, .io, .ai, .app, .dev, .co, .xyz, .me, .info, .biz

Country TLDs (35): .us, .uk, .ca, .au, .de, .fr, .it, .es, .nl, .jp, .kr, .cn, .in, .br, .mx, .ar, .cl, .co, .pe, .ru, .pl, .cz, .ch, .at, .se, .no, .dk, .fi, .be, .pt, .gr, .tr, .za, .eg, .ma, .ng, .ke

New TLDs: .tech, .online, .site, .website, .store, .shop, .cloud, .digital, .blog, .news, and more

System Requirements:

• Python 3.10 or higher
• Claude Desktop application
• uv package manager
• Stable internet connection for DNS/WHOIS queries

Technical Architecture:

The system employs multiple verification layers:

1. DNS Resolution: Primary method checking if domains resolve to IP addresses
2. WHOIS Lookup: Secondary verification querying registration databases
3. Socket Connection: Fallback method for additional verification
4. Parallel Processing: Concurrent checking with semaphore-based rate limiting
5. Result Categorization: Organized output by TLD categories and availability status

Security Considerations:

• All domain queries are read-only operations
• No personal information transmitted beyond domain names
• External DNS and WHOIS queries may be logged by providers
• Rate limiting prevents abuse of external services
• No modification of external systems or registrations

Use Cases:

• Domain Research: Explore availability across multiple extensions for brand protection
• Startup Naming: Find available domains for new business ventures
• Brand Monitoring: Check competitor domain registrations and alternatives
• Investment Research: Identify valuable domain opportunities
• Web Development: Verify domain availability during project planning
• SEO Strategy: Research domain alternatives for marketing campaigns
• Portfolio Management: Monitor domain expiration and availability status

Performance Features:

• Concurrent Processing: Parallel checking of up to 20 domains simultaneously
• Smart Rate Limiting: Prevents overwhelming external DNS/WHOIS services
• Efficient Caching: Optimized request patterns for faster response times
• Timeout Management: Configurable timeouts for reliable operation
• Error Handling: Graceful degradation when services are unavailable

This integration demonstrates how AI assistants can streamline domain research workflows, providing comprehensive availability checking through natural language interaction while maintaining high performance and accuracy standards.

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