RDAP domain lookup, status check, and multi-TLD availability scan via @pipeworx/mcp-domains — ICANN standard, credential-free

@pipeworx/mcp-domains v0.2.0 — RDAP domain lookup (ICANN standard, free, no auth)

Architecture: Pipeworx SDK module (not a standard stdio MCP server). Exports {tools, callTool}. Call callTool(name, args) directly or wrap in a Pipeworx runtime. Uses the public RDAP bootstrap at https://rdap.org — the ICANN-standard replacement for legacy WHOIS that returns structured JSON.

Install: npm install @pipeworx/mcp-domains (zero deps, TypeScript source only — needs tsx or stripped TS to run)

3 tools

Verified trace (8 calls, 7 OK + 1 rate-limited)

1. domain_lookup google.com (1981ms)

{"domain":"GOOGLE.COM","registered":true,"registrar":"MarkMonitor Inc.","registrant":null,
 "registration_date":"1997-09-15T04:00:00Z","expiration_date":"2028-09-14T04:00:00Z",
 "nameservers":["ns1.google.com","ns2.google.com","ns3.google.com","ns4.google.com"],
 "dnssec":false,"status":["client delete prohibited","client transfer prohibited","client update prohibited","server delete prohibited","server transfer prohibited","server update prohibited"]}

2. domain_lookup github.com (701ms) — registrar: MarkMonitor Inc., registered 2007, expires 2026, 8 nameservers (NS1+Route53 dual).

3. domain_status anthropic.com (728ms)

{"domain":"ANTHROPIC.COM","registered":true,"available":false,"expiration_date":"2033-10-02T18:10:32Z",
 "status":["client delete prohibited","client transfer prohibited","client update prohibited"]}

4. domain_status nonexistent123xyz.com (535ms) — {"registered":false,"available":true} — clean availability check.

5. domain_lookup tani.ai (806ms)

{"domain":"tani.ai","registered":true,"registrar":"GoDaddy.com, LLC","registrant":"Registration Private",
 "registration_date":"2023-03-01T10:37:31Z","expiration_date":"2027-03-01T10:37:31Z",
 "nameservers":["trey.ns.cloudflare.com","yolanda.ns.cloudflare.com"],"dnssec":false,"status":["active"]}

Note: .ai TLD returns registrant info (privacy-protected) and "active" status, vs .com which returns verbose ICANN status codes.

6. check_availability "acme" default TLDs (1312ms) — checked 8 TLDs in parallel:

{"name":"acme","checked":8,"available_count":2,
 "results":[{"domain":"acme.com","available":false,"expiration_date":"2027-04-18T04:00:00Z"},
  {"domain":"acme.io","available":true},{"domain":"acme.ai","available":false},
  {"domain":"acme.co","available":true},{"domain":"acme.net","available":false},
  {"domain":"acme.org","available":false},{"domain":"acme.app","available":false},
  {"domain":"acme.dev","available":false}]}

7. check_availability "xyzqwerty99" custom TLDs (627ms) — ["com","io","dev"] → all 3 available.

8. domain_lookup bbc.co.uk (142ms) — 429 Too Many Requests (rate-limited after 15+ RDAP calls).

Key gotchas

• RDAP ≠ WHOIS: structured JSON output, ICANN standard. Different from @bharathvaj/whois-mcp and @mcp-server/whois-mcp which use legacy WHOIS protocol
• Rate limiting: rdap.org returns 429 after ~15 rapid-fire calls in one session — the check_availability tool makes N parallel calls (one per TLD), so it burns through the budget fast
• Status codes vary by TLD: .com returns verbose ICANN codes ("client delete prohibited"), .ai returns just "active"
• Registrant privacy: most .com domains show null registrant (GDPR), but some TLDs (.ai) show the privacy service name
• Domain names uppercased: .com responses uppercase the domain ("GOOGLE.COM"), .ai preserves case
• **check_availability max 15