FastDomainCheck MCP Server (Python)

This is a domain availability check server implemented using Python and the Model Context Protocol (MCP). It provides MCP Tools to check if single or multiple domain names are already registered.

Features

• Bulk domain registration status checking

• Dual verification using WHOIS and DNS

• Support for IDN (Internationalized Domain Names)

• Concise output format

• Built-in input validation and error handling

Related MCP server: Domain Checker MCP Server

Tool Documentation

check_domains

Check registration status for multiple domain names.

Input Format

{
  "domains": ["example.com", "test.com"]
}

Parameters:

• domains: Array of strings containing domain names to check

  • Maximum length of 255 characters per domain

  • Maximum 50 domains per request

  • No empty domain names allowed

Output Format

{
  "results": {
    "example.com": {
      "registered": true
    },
    "test.com": {
      "registered": false
    }
  }
}

Response Fields:

• results: Object with domain names as keys and check results as values

  • registered: Boolean

    • true: Domain is registered

    • false: Domain is available

Error Handling

The tool will return an error in the following cases:

1. Empty domains list

2. More than 50 domains in request

3. Empty domain name

4. Domain name exceeding 255 characters

5. Result serialization failure

Error Response Format:

{
  "error": "Error: domains list cannot be empty"
}

Usage Examples

Check multiple domains:

Request

{
  "domains": ["example.com", "test123456.com"]
}

Response

{
  "results": {
    "example.com": {
      "registered": true
    },
    "test123456.com": {
      "registered": false
    }
  }
}

MCP Server Settings

Configuring FastDomainCheck MCP in Claude Deskto

Modify your claude-desktop-config.json file as shown below

{
  "mcpServers": {
    "fastdomaincheck": {
      "command": "uvx",
      "args": [
        "fastdomaincheck-mcp-server"
      ]
    }
  }
}

Go Version Reference

go version

Contributing

Feel free to open issues or submit pull requests.

License

MIT License (You should add a LICENSE file, typically containing the MIT license text)