Supports installation of the required uv package manager through Homebrew, enabling easier setup on macOS/Linux systems.
MCP Domain Availability Checker
Features
Domain Availability Checking
Check availability across 50+ popular TLD extensions
Support for popular (.com, .io, .ai), country (.us, .uk, .de), and new TLDs (.app, .dev, .tech)
Dual verification using DNS and WHOIS for accuracy
Smart TLD suggestions organized by popularity
Search Capabilities
Check specific domains with exact TLD matching
Bulk checking across supported extensions for a given name
Parallel processing for faster domain queries
Organized results by TLD categories
MCP Integration
Easy setup with uvx package management
Seamless integration with Claude Desktop
Real-time availability status updates
Performance metrics and timing information
AI Assistant Features
Natural language domain queries through Claude
Automated domain suggestion workflows
Smart recommendations based on availability
Demo
00:00 - Checking google.com availability
Testing a well-known premium domain to demonstrate the domain checking functionality and alternative TLD suggestions.
00:20 - Testing myawesomesite.com
Verifying availability for a custom domain name and exploring alternative extension options.
00:40 - Verifying techstartup2026.io
Exploring tech startup domain options and checking availability across multiple TLD extensions.
01:00 - Analyzing aitools domain
Checking competitive AI industry domains and analyzing market availability for startup naming.
Requirements
Python 3.10 or higher
Claude Desktop
uv package manager
Dependencies Installation
Install uv package manager using one of these methods:
Official installer (recommended):
Homebrew (macOS/Linux):
Install Homebrew (if needed):
Visit https://brew.sh for installation instructions on all operating systems
Or run:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
The MCP server automatically manages Python dependencies through uvx.
Installation
Zero-Clone Installation (Recommended)
The MCP Domain Availability Checker supports direct installation without cloning repositories, using uvx for package management.
Configuration
The Claude Desktop configuration file is located at:
macOS:
~/Library/Application Support/Claude/claude_desktop_config.json
Windows:
%APPDATA%\Claude\claude_desktop_config.json
Linux:
~/.config/Claude/claude_desktop_config.json
Edit this file to add the Domain Availability MCP configuration:
If you already have other MCPs configured, simply add the "mcp-domain-availability" section inside the "mcpServers" object:
Installing via Smithery
To install mcp-domain-availability for Claude Desktop automatically via Smithery:
Manual Installation
For development or local testing:
Clone the repository:
Install dependencies:
Run locally:
How It Works
The MCP Domain Availability Checker uses multiple verification methods to determine domain availability:
DNS Resolution: Checks if the domain resolves to an IP address
WHOIS Lookup: Queries WHOIS databases for registration information
Socket Connection: Falls back to socket-based checking when other methods aren't available
The tool combines results from these methods to provide accurate availability status, with parallel processing for checking multiple domains simultaneously.
Available Tools
Domain Checking
Tool Name | Description | Usage |
| Check domain availability with --domain flag |
or
|
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 & more.
Example Usage
Here are examples of how to use the MCP Domain Availability Checker with Claude:
Single Domain Check
Domain Name Research
Specific Domain Verification
Output Format
The tool provides comprehensive results including:
Requested Domain: Status of the exact domain queried (if specific TLD provided)
Available Domains: List of available domains sorted alphabetically
Unavailable Domains: List of registered domains
Summary Statistics: Breakdown by TLD categories (Popular, Country, New TLDs)
Performance Metrics: Check duration for each domain
Troubleshooting
"Server disconnected" error
If you see connection errors in Claude Desktop:
Verify uvx installation:
Run
uvx --version
to ensure uvx is properly installedReinstall uv if necessary:
curl -LsSf https://astral.sh/uv/install.sh | sh
Check Python version:
Ensure Python 3.10+ is available:
python3 --version
DNS resolution issues
If domain checks are failing:
Network connectivity:
Verify internet connection is stable
Check if DNS servers are accessible
Rate limiting:
Large bulk checks may hit rate limits from DNS/WHOIS services
The tool uses a semaphore to limit concurrent requests to 20
Configuration issues
If the MCP server isn't starting:
Verify configuration syntax:
Ensure JSON syntax is valid in
claude_desktop_config.json
Check that all brackets and quotes are properly matched
Restart Claude Desktop:
Close and restart Claude Desktop after configuration changes
Development
Project Structure
main.py
: Main entry point with MCP server and domain checking logicDomain checking functions with DNS, WHOIS, and socket fallback methods
TLD management with categorized lists
Async processing for parallel domain checks
Building
Testing
Local Development
Security Considerations
The MCP Domain Availability Checker makes external network requests to DNS servers and WHOIS services. Users should be aware that:
Domain queries may be logged by DNS providers
WHOIS queries are typically logged and may be rate-limited
No personal information is transmitted beyond the domain names being checked
All queries are read-only and do not modify any external systems
Contributing
Contributions are welcome! Areas for improvement include:
Adding support for additional TLD categories
Implementing caching mechanisms for faster repeated queries
Enhancing WHOIS parsing for more detailed domain information
Improving error handling and retry mechanisms
License
This project is licensed under the Mozilla Public License 2.0 - see the LICENSE file for details.
Related Links
remote-capable server
The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.
Tools
Domain Availability Checker MCP
Related MCP Servers
- Mozilla Public License 2.0
- MIT License
- MIT License