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MCP server · Browser

Domain Check

· github.com/stucchi/domain-check-mcp

Check domain name availability. Supports 500+ TLDs via RDAP, with WHOIS fallback for .de and .cn.

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About Domain Check

Domain Check is an MCP server in the Browser category: check domain name availability. Supports 500+ TLDs via RDAP, with WHOIS fallback for .de and .cn.

Install

uvx
uvx domain-check-mcp
pip
pip install domain-check-mcp

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

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README

domain-check-mcp

PyPI Python MCP Server MCP Enabled Claude Compatible GitHub stars GitHub issues

MCP server for checking domain name availability. Supports 500+ TLDs via RDAP, with WHOIS fallback for .de and .cn.

Installation

uvx domain-check-mcp

Usage in .mcp.json

{
  "mcpServers": {
    "domain-check": {
      "command": "uvx",
      "args": ["domain-check-mcp"]
    }
  }
}

Tools

  • check_domain — Check if a domain name is available for registration

Example

check_domain("example.com")

Returns:

{
  "domain": "example.com",
  "available": false,
  "status": "registered"
}

Supported TLDs

Via RDAP (500+)

All major gTLDs and many ccTLDs with RDAP support, sourced from the IANA RDAP Bootstrap:

.com, .net, .org, .info, .app, .dev, .io, .xyz, .site, .shop, .uk, .fr, .nl, .pl, .consulting, .cloud, .tech, .blog, .store, .online, and many more.

Via WHOIS

TLD WHOIS Server
.de whois.denic.de
.cn whois.cnnic.cn
.fj www.whois.fj
.gs whois.nic.gs
.bayern whois.nic.bayern
.cat whois.nic.cat
.eus whois.nic.eus
.radio whois.nic.radio
.scot whois.nic.scot
.sport whois.nic.sport

How it works

  1. Extracts the TLD from the domain name
  2. Routes to the appropriate adapter (RDAP or WHOIS)
  3. RDAP: HTTP lookup — 404 means available, 200 means registered
  4. WHOIS: TCP port 43 lookup — pattern matching on the response
  5. Returns a structured result with availability status

Development

git clone https://github.com/stucchi/domain-check-mcp.git
cd domain-check-mcp
python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"
pytest

License

MIT

README copy captured when this server was indexed; it may lag the repository. The original is authoritative.

Questions

About Domain Check

How do I install Domain Check?

Run uvx domain-check-mcp, then add the server to your MCP client's configuration.

Is Domain Check safe to use with an AI agent?

Its trust score is 37 out of 100 (low). It passes 1 of the 1 static security checks run so far. It has no ConduID identity yet, so agent calls to it are not receipted.

Is Domain Check still maintained?

Conduid hasn't recorded a commit date for this repository yet. Check the repository directly for recent activity.