MCP Domain Availability Checker

Install uv package manager using one of these methods:

curl -LsSf https://astral.sh/uv/install.sh | sh

The MCP server automatically manages Python dependencies through uvx.

The MCP Domain Availability Checker supports direct installation without cloning repositories, using uvx for package management.

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:

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

git clone https://github.com/imprvhub/mcp-domain-availability cd mcp-domain-availability

uv run src/mcp_domain_availability/main.py

Deploying with Docker to Google Cloud Run

The MCP server supports two transport modes:

- stdio(default): For Claude Desktop integration via stdin/stdout
- sse: For HTTP/web deployments like Google Cloud Run

When deploying to Cloud Run, theMCP_TRANSPORTenvironment variable must be set tosse.

The easiest way to deploy is to use thedeploy.shscript.
-

Edit the script:Opendeploy.shand replace...with your Google CloudPROJECT_ID. You can also change theREGIONif needed.

Run the script:Make the script executable and run it.

The script will build the Docker image, push it to Google Container Registry, and deploy it to Cloud Run with MCP_TRANSPORT=sse.

Alternatively, you can run the commands manually.

export PROJECT_ID="<YOUR_PROJECT_ID>" export REGION="<YOUR_REGION>" export IMAGE="gcr.io/$PROJECT_ID/mcp-domain-availability:latest"

docker buildx build --platform linux/amd64 -t $IMAGE --push .

gcloud run deploy mcp-domain-availability \ --image $IMAGE \ --region $REGION \ --platform managed \ --allow-unauthenticated \ --port 8080 \ --set-env-vars MCP_TRANSPORT=sse \ --project $PROJECT_ID

Note:For local Claude Desktop usage, no environment variables are needed. The server defaults tostdiotransport mode.

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.

com, net, org, io, ai, app, dev, co, xyz, me, info, biz

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

tech, online, site, website, store, shop, cloud, digital, blog, news & more.

Here are examples of how to use the MCP Domain Availability Checker with Claude:

Check if mysite.com is available using --domain

Check availability for "startup" across all TLDs using --domain

Is awesome.io available? Use --domain to check

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

If you see connection errors in Claude Desktop:

- Runuvx --versionto ensure uvx is properly installed
- Reinstall uv if necessary:curl -LsSf https://astral.sh/uv/install.sh | sh

- Ensure Python 3.10+ is available:python3 --version

- Verify internet connection is stable
- Check if DNS servers are accessible

- Large bulk checks may hit rate limits from DNS/WHOIS services
- The tool uses a semaphore to limit concurrent requests to 20

- Ensure JSON syntax is valid inclaude_desktop_config.json
- Check that all brackets and quotes are properly matched

- Close and restart Claude Desktop after configuration changes

- main.py: Main entry point with MCP server and domain checking logic
- Domain checking functions with DNS, WHOIS, and socket fallback methods
- TLD management with categorized lists
- Async processing for parallel domain checks

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

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

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