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Fastdomaincheck MCP Server

@bingal

Repository

Basic information

Category

Other

Transports

stdio

Author

bingal

Submitted by

斌 王

About Fastdomaincheck MCP Server

MCP Server for blazing-fast domain name availability checks.

#domain#availability#check

Fastdomaincheck MCP Server config

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

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

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

Frequently asked questions

1

What does the `check_domains` tool return?

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

2

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.

3

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.

4

Does Fastdomaincheck support IDN (Internationalized Domain Names)?

Yes, IDN support is listed as a feature.

5

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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