Fastdomaincheck

Name: Fastdomaincheck
Author: bingal

@bingal

Repository

About Fastdomaincheck

MCP Server for blazing-fast domain name availability checks.

#domain #availability #check

Basic information

Config

Add this server to your MCP-compatible client using the configuration below.

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

Tools

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Overview

What is Fastdomaincheck?

Fastdomaincheck is a domain availability check server built with Python and the Model Context Protocol (MCP). It provides MCP tools to check whether single or multiple domain names are already registered, using WHOIS and DNS dual verification.

How to use Fastdomaincheck?

Install and configure Fastdomaincheck by adding it to your MCP client's server configuration (e.g., Claude Desktop) using the uvx command and the package fastdomaincheck-mcp-server. Invoke the check_domains tool with a JSON object containing an array of up to 50 domain names.

Key features of Fastdomaincheck

Bulk domain registration status checking (up to 50 domains per request)
Dual verification using WHOIS and DNS
Support for IDN (Internationalized Domain Names)
Concise output format with boolean registered status
Built-in input validation and error handling

Use cases of Fastdomaincheck

Quickly check availability of multiple domain name ideas at once
Validate a list of domains for a new project or business
Automate domain registration checks in a larger MCP-based workflow
Verify IDN domains that cannot be checked with simple dig tools

FAQ from Fastdomaincheck

What does the `check_domains` tool return?

It returns an object mapping each domain to a registered boolean: true means registered, false means available.

Are there any limits on domain names I can check?

Yes: each domain name must be 255 characters or fewer, you can send up to 50 domains per request, and no empty domain names are allowed.

What happens if I send an invalid request?

The tool will return an error message in JSON format, for example if the domains list is empty, exceeds 50 domains, or contains an empty name.

Does Fastdomaincheck support IDN (Internationalized Domain Names)?

Yes, IDN support is listed as a feature.

How is Fastdomaincheck installed?

It is installed via uvx using the package name fastdomaincheck-mcp-server, configured in your MCP client’s settings file (e.g., claude-desktop-config.json).

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