The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the MCP Whoisxmlapi listing page.
The official WhoisXML API MCP server: 32 first-party tools for WHOIS, DNS, IP geolocation, threat intelligence, typosquatting, email verification, and native bulk lookups — in Claude, Cursor, VS Code, LobeChat, or any MCP client.
@whoisxmlapidotcom/mcp-whoisxmlapiwhoisxmlapidotcom/mcp-whoisxmlapiio.github.whois-api-llc/mcp-whoisxmlapiThis repository is the public listing home for the server. Distribution is via the hosted endpoint, npm, and Docker Hub; the implementation source is maintained privately by Whois API, Inc.
Connect any remote-capable MCP client to the hosted server — authentication is via OAuth with your WhoisXML API key:
Requires a WhoisXML API key — get one at https://whoisxmlapi.com.
npm:
Docker:
| Tool | What it does |
|---|---|
whois | Current WHOIS/RDAP registration data for a domain — registrar, dates, nameservers, status, contacts. |
whois_history | Full timeline of WHOIS changes — ownership transfers, registrar moves, nameserver swaps. |
domain_info | Enriched WHOIS profile combining current + historical records to fill redacted fields. |
reverse_whois | Every domain whose WHOIS record contains a free-text term (name, email, org, address). |
reverse_whois_advanced | Field-specific WHOIS searches (e.g. RegistrantContact.Organization), up to 4 terms. |
domain_reputation | 0–100 trust score from live infrastructure and configuration checks. |
typosquatting | Check whether a domain belongs to a typosquatting group, or expand the full group. |
categorization | Classify a domain into IAB Content Taxonomy v3.1 categories. |
| Tool | What it does |
|---|---|
dns_lookup | Current DNS records — A, AAAA, MX, NS, SOA, TXT, CNAME, PTR, SRV, CAA, DS, DNSKEY, or all. |
dns_history | Historical DNS records (forward) or domains historically on an IP (reverse). |
reverse_dns | Search DNS records by pattern and return matching domains. |
reverse_ip | Every domain currently pointing at an IP, with first-/last-seen dates. |
reverse_mx | Every domain using a specific MX server. |
reverse_ns | Every domain delegated to a specific nameserver. |
subdomain_lookup | Enumerate up to 10,000 known subdomains of a domain with seen timestamps. |
domain_and_subdomain_discovery | Newly-registered domains/subdomains containing search terms (wildcards supported). |
ssl_certificates | TLS certificate details — issuer, validity, SANs, chain trust. |
| Tool | What it does |
|---|---|
ipgeolocation | Country, region, city, ISP, ASN for an IP, domain, or email. |
ip_netblocks | CIDR ranges, ASN, organisation, and registration dates for IP/ASN/org. |
| Tool | What it does |
|---|---|
threat_intelligence | Check a domain, URL, IP, CIDR, or file hash against malware/phishing/spam/botnet feeds. |
brand_alert | Newly added/dropped/updated domains containing brand terms — typosquat & lookalike monitoring. |
registrant_alert | New/changed domains whose WHOIS registrant fields match search terms. |
| Tool | What it does |
|---|---|
email_verification | Syntax, MX, and SMTP deliverability checks; flags disposable/role/free/catch-all. |
disposable_email_check | Boolean verdict on disposable/temporary email providers. |
| Tool | What it does |
|---|---|
website_screenshot | Capture a web page screenshot, returned as a native image content block. |
| Tool | What it does |
|---|---|
bulk_whois | WHOIS for up to 10,000 domains in one call (native bulk, async job_id if long-running). |
bulk_email_verification | Email verification for up to 10,000 addresses (native bulk, async if long-running). |
bulk_dns_lookup | DNS lookups for up to 200 domains, fanned out concurrently. |
bulk_ip_geolocation | IP geolocation for up to 200 IPs, fanned out concurrently. |
bulk_subdomain_lookup | Subdomain discovery for up to 200 apex domains. |
bulk_job_status | Progress of an in-flight bulk job. |
bulk_job_results | Full per-input results of a completed bulk job. |
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