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Domain Check

stucchi/domain-check-mcp

Routes domain availability checks through RDAP for 500+ TLDs, with WHOIS fallback for extensions like .de and .cn. Exposes a single check_domain tool that returns structured availability status. RDAP queries use HTTP lookups (404 for available, 200 for registered), while WHOIS hits port 43 and pattern matches responses. The RDAP registry pulls from IANA's bootstrap data, covering major gTLDs and ccTLDs. Reach for this when you need Claude to validate domain names during brainstorming sessions, batch check availability for project names, or verify domains without switching contexts to a registrar UI.

tool
1
transport
STDIO
last updated
Feb 25, 2026
View on GitHub

Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

check_domainCheck if a domain name is available for registration

Check if a domain name is available for registration

No parameter schema in public metadata yet.

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Readme

domain-check-mcp

PyPI License: MIT 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

View the full README on GitHub

Details

Repository
github.com/stucchi/domain-check-mcp
Package
domain-check-mcp
Transport
STDIO
Registry
MCP registry, active

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