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grist.tools WHOIS Lookup
x402
grist.tools WHOIS Lookup is a paid API for AI agents from grist.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).
Performs a WHOIS lookup on a given fully qualified domain name and returns registration and ownership data from the relevant registry.
Price / call$0.002
Success—
StatusUnknown
How this service works
One endpoint does one thing, always the same way, for a fraction of a cent. Payment is verified before the handler runs and settled only after it succeeds, so a rejected or failed call is never a charged call.
Output
A structured WHOIS record for the requested domain, including fields such as registrant name and organization, registrar, creation date, expiration date, last updated date, nameservers, and WHOIS server used. Exact fields vary by TLD registry.
Example use cases
Verify domain ownership before outreach
“I want to reach out to the owner of techstartup.io — can you do a WHOIS lookup and tell me the registrant name and contact details?”
Check competitor domain expiry
“Can you check when competitor-brand.com is set to expire? I want to know if it might become available soon.”
Investigate suspicious website
“I got a phishing link from sketchy-site.net — can you pull the WHOIS record so I can see who registered it and when?”
Technical details
Endpoint
POSThttps://grist.tools/v1/whois?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need programmatic WHOIS data for a single domain at low cost ($0.002 per call), especially in agentic workflows that require domain registration intelligence without managing rate limits or WHOIS server mappings. Prefer this over free WHOIS web tools when you need reliable JSON-structured output, pay-per-use pricing, and built-in TLD-to-registry routing.
Side effects
- Domain not found or unregistered — registry returns no match
- Invalid or malformed domain name — rejected before query
- TLD not supported or no WHOIS server available for that registry
- Registry rate limiting or timeout — transient failure
- Payment rejected before handler runs — call not charged
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domainrequired | string | Public fully qualified domain name to look up, up to 253 characters; it is lowercased and stripped of trailing dots, and its TLD picks the registry whois server (built-in map, else the IANA referral). |
Tags
x402
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