domain-check-skills-mcp

domain-check-skills-mcp

⚡ The fastest domain availability MCP server — or the second

The fastest domain availability MCP — or the second. A first-time check lands in about half a second (under 0.9 s at p95, measured from the US and the EU, September 2026); a repeat within 60 s is ~0.1 s from the edge cache. Hard-capped so it never hangs. The pipeline (debounce → registry RDAP + DNS → third signal → edge cache) is published openly. Found something faster? Dispute it.

MCP server to check domain availability from any LLM — Claude, Cursor, Windsurf, Continue, Zed. 6 registrars, 50+ TLDs. Powered by DigMyName.

Typical latency	about half a second first-time check (p50 0.4–0.5 s, under 0.9 s at p95) · ~0.1 s cache-warm — everyday numbers measured from the US and the EU in September 2026, not a lab result; the on-screen timer is the live proof
Method	Published at digmyname.com/speed
Coverage	6 registrars · 50+ TLDs
Cost	Free — no API key, no account

Install

Claude Code — one line:

claude mcp add domain-check -- npx -y domain-check-skills-mcp

Claude Desktop / Cursor / Windsurf — add to your MCP config:

{
  "mcpServers": {
    "domain-check": {
      "command": "npx",
      "args": ["-y", "domain-check-skills-mcp"]
    }
  }
}

Continue (~/.continue/config.json):

{
  "experimental": {
    "modelContextProtocolServers": [
      { "transport": { "type": "stdio", "command": "npx", "args": ["-y", "domain-check-skills-mcp"] } }
    ]
  }
}

Zed (settings.json):

{
  "context_servers": {
    "domain-check": {
      "command": { "path": "npx", "args": ["-y", "domain-check-skills-mcp"] }
    }
  }
}

VS Code (.vscode/mcp.json):

{
  "servers": {
    "domain-check": { "type": "stdio", "command": "npx", "args": ["-y", "domain-check-skills-mcp"] }
  }
}

No API key, no account, no config — it works right after install.

Tools

Tool	Description
check_domain	Availability, premium / likely-premium flags, cheapest registrar, direct buy link and registration year (when taken) for one domain.
search_domains	One name across many TLDs at once (defaults to a curated set of 11). Includes availability, price, buy link and registration year for taken results.
compare_registrars	Registration, renewal and 3-year totals per registrar for a TLD.
get_domain_age	Registration year and expiration date for a taken domain via RDAP.

Example prompts

• "Is acme.io available and where is it cheapest?"
• "Check nebula across com, io, ai, dev and app."
• "Compare registrar prices for .ai."
• "When was stripe.com registered?"

Example response

check_domain for acmeforge.io returns:

acmeforge.io — AVAILABLE
  cheapest: Porkbun $28.12/yr
  buy: https://porkbun.com/checkout/search?q=acmeforge.io
  compare: https://digmyname.com/?q=acmeforge&utm_source=mcp&utm_medium=api&utm_campaign=domain-check-skills

How it works

Availability is resolved through an authoritative-first chain — RDAP (IANA bootstrap), authoritative DNS-over-HTTPS (Cloudflare, Google and AdGuard, hedged), Fastly Domain Research and registrar APIs. Anything unresolved is returned as UNKNOWN rather than falsely reported as taken. Premium candidates are flagged separately so agents never quote a standard retail price for a registry-premium name.

Pricing comes from DigMyName's registrar price cache across 6 registrars and 50+ TLDs.

Domain age is read from registry RDAP endpoints.

Rate limit: 60 requests / minute / IP. Repeat lookups are served from the Cloudflare edge cache in about 0.1 s.

Configuration

Env var	Default	Purpose
DIGMYNAME_API_BASE	https://api.digmyname.com/functions/v1/public-api	Override the API base. Set this to the direct Supabase URL to bypass the edge cache.

Releasing (maintainers)

Releases are published from a maintainer's machine:

cd mcp
# bump the version in package.json, server.json (two places) and the VERSION constant in src/index.ts; add a CHANGELOG entry
npm run build
npm publish --provenance=false   # npm asks you to confirm in the browser (web-based 2FA)

The Publish MCP to npm workflow (tag mcp-v*) would publish with provenance from CI, but it needs an NPM_TOKEN repo secret that is not configured; releases so far have been published without provenance.

Requirements

Node.js 18+

Changelog

See CHANGELOG.md.

License

MIT