Look Up Domain Registration Details
Query WHOIS and RDAP databases to get complete registration information for any domain.
WHOIS & RDAP
Domain owner, registrar & expiry
Look up domain registration details: registrant, creation/expiry dates, registrar, nameservers, and registry status. Uses RDAP with automatic WHOIS fallback for accuracy across all TLDs. For domain research, security investigations, and brand protection.
Lookup Domain Registration
Inspect a domain with standards-based RDAP lookup and automatic WHOIS fallback. Returns registration status, availability signal, registrar details, nameservers, and lifecycle dates.
Returns: Structured domain registration intelligence with registrar, lifecycle dates, status, nameservers, and source/fallback metadata
Parameters
domain *stringDomain to inspect (e.g. "example.com")
include_rawbooleanInclude raw RDAP/WHOIS payloads in the output for debugging
Example
Lookup registration metadata for google.com
curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
-d '{
"tool": "whois-rdap",
"skill": "lookup_domain",
"input": {
"domain": "google.com"
}
}' \
https://api.toolrouter.com/v1/tools/callQuick Start
MCP (Claude Code)
claude mcp add --transport stdio \
--env TOOLROUTER_API_KEY=YOUR_API_KEY \
toolrouter -- npx -y toolrouter-mcpREST API
curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
-d '{"tool":"whois-rdap","skill":"lookup_domain","input":{}}' \
https://api.toolrouter.com/v1/tools/callUse Cases
Check Domain Expiration Dates
Monitor when domains expire to prevent accidental lapses or plan acquisition of expiring domains.
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Workflows
Domain Acquisition Research
Research domain acquisition opportunities by searching availability, checking ownership, examining DNS, and reviewing domain history.
SSL and DNS Audit
Audit SSL certificates, DNS configuration, HTTP security headers, and domain registration for security gaps.
Domain Intelligence Report
Build a comprehensive intelligence report on any domain using WHOIS, DNS, geolocation, and web archive data.
Certificate Monitoring
Monitor SSL/TLS certificates for expiration, verify TLS configuration, and confirm domain ownership alignment.
Frequently Asked Questions
What registration details can I see?
You can look up registrant data, creation and expiry dates, registrar details, nameservers, and registry status.
Why does it mention RDAP and WHOIS?
It uses RDAP first and falls back to WHOIS when needed, which improves coverage across different TLDs.
Can it help with domain investigations?
Yes. It is useful when you need ownership and lifecycle details for security investigations or brand protection.
Can it tell me when a domain is about to expire?
Yes. Expiry date is one of the main fields returned by the lookup.