Whois MCP Server

Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/cyanheads-whois-mcp-server

About

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Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools

6 read · 0 write · 0 deleteRead-only

Secrets

None asked for

Install scripts

Not scanned yet

Runs as

Node.js package

Tools (6)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

• whois_check_availabilityDomain Registration Statusread-only

  Check RDAP registry record status: registered, not_found, or unknown when coverage is absent. available is false for a found record and null otherwise; a registry miss never guarantees registration eligibility. Known ICANN subdomains are rejected with their registrable parent; private suffixes are not registration boundaries. For the full record use whois_lookup_domain.

• whois_get_dnsDNS Record Lookupread-only

  Fetch DNS records for a domain via DNS-over-HTTPS. Supports A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, PTR. Multiple types are fetched in parallel. NXDOMAIN is returned as nxdomain: true in the result, not as an error — the terminal name does not exist; preceding alias answers are retained. NOERROR with no answers is empty data; DNS failure codes and truncated responses are errors after retries and fallback. TXT values are returned completely and rendered literally.

• whois_get_dossierDomain Dossierread-only

  One-call domain triage: fetches registration record (RDAP) and DNS records (A, MX, NS, TXT) in parallel, returning a single normalized record with factual signals — domain age in days, privacy-redacted flag, registrar, NS provider inferred from NS records, mail provider inferred from MX records. No synthesized scores — factual signals only. Partial results are surfaced when one leg fails (registration or DNS marked with source_error); only when both legs fail does the tool throw both_legs_failed. For the full registration record use whois_lookup_domain. For DNS types beyond A/MX/NS/TXT (e.g., …

• whois_lookup_asnASN Lookupread-only

  Resolve an Autonomous System Number (ASN) to its org name, country, and RIR source via RIR RDAP. Accepts a decimal ASN from 1 to 4294967295 (e.g., "AS15169" or "15169"). Distinct from IP lookup — the entry point is the ASN itself, not an IP within its block.

• whois_lookup_domainDomain Registration Lookupread-only

  Look up a domain's registration record — registrar, created/expiry dates, nameservers, EPP status codes, provider DNSSEC evidence, and public registrant organization independently of contact redaction. Uses IANA bootstrap to select the correct per-TLD RDAP server, returning one normalized shape regardless of TLD. When the TLD has no RDAP coverage, throws rdap_no_coverage. A missing registry object throws domain_not_found; whois_check_availability returns record status without an eligibility guarantee. include_registrar opts into one bounded registrar referral with separate contact detail; regi…

• whois_lookup_ipIP Address / Network Lookupread-only

  Look up an IP address or CIDR block via RIR RDAP (ARIN, RIPE, APNIC, LACNIC, AFRINIC — auto-routed via IANA bootstrap). Returns netblock, org, country, all provider CIDRs, abuse contact email, and reverse DNS (PTR) via DoH. PTR status distinguishes found, not_found, and failed with ptr_source_error. Alias traversal is limited to five transitions under one DNS deadline. The base address is queried for CIDR input. The server excludes IPv4 0/8, 10/8, 100.64/10, 127/8, 169.254/16, 172.16/12, 192.168/16, 255/8 and IPv6 ::1/128, fc00::/7, fe80::/10. Other special-use addresses remain eligible for lo…

Signals

Stars

1

Forks

0

Open issues

0

Weekly downloads

322

Last commit

Oct 17, 2026 (14 days ago)

Last release

Oct 16, 2026 (15 days ago)

Last package publish

Oct 16, 2026 (15 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Registry name

io.github.cyanheads/whois-mcp-server

Version

0.2.1

Auth

No auth

Packages

npm @cyanheads/whois-mcp-servernpm @cyanheads/whois-mcp-server

License

Apache-2.0

Repository

github.com/cyanheads/whois-mcp-server

First seen

Oct 24, 2026

Last checked

Oct 24, 2026

Source

Official MCP Registrygithub-graphql