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DomainRef - Domain Age Lookup
x402
DomainRef - Domain Age Lookup is a paid API for AI agents from domainref.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-11-01).
Returns the registration age and registrar details for a given domain as part of email/domain security grading
Price / call$0.005
Success—
StatusUnknown
How this service works
Use when mail lands in spam, before an email campaign, for vendor due diligence or to confirm a Microsoft 365 tenant: graded SPF, DKIM, DMARC, MX, MTA-STS, DNSSEC, CAA, TLS and domain age, plus BIMI and blocklist info, each with the exact fix record. Non-intrusive. $0.01 per domain.
Output
Returns a JSON object with a security grade, the queried domain name, and a registration object containing the domain's age in days, the registrar's name, and the registrar's IANA ID. This lets agents quickly assess domain trustworthiness based on registration history.
Example use cases
Pre-campaign sender domain vetting
“Before I send this marketing email campaign, can you check how old our sending domain acmecorp.io is and confirm the registrar details so I know it won't get flagged as a newly registered phishing domain?”
Vendor due diligence domain check
“We got an invoice from a company at newvendor-payments.com — can you look up how old that domain is? I want to make sure it's not a newly spun-up fraud domain before we pay anything.”
Spam investigation for received email
“I got a suspicious email from support@quickdeal-offers.net and it landed in spam — can you check how old that domain is and who registered it so I can decide if it's legitimate?”
Technical details
Endpoint
GEThttps://domainref.dev/v1/domain/age?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, non-intrusive lookup of a domain's registration age and registrar as part of email security analysis, phishing detection, or vendor due diligence. It is ideal when you want a lightweight signal about domain trustworthiness without triggering active probes, and when you need exact registrar attribution. At $0.005 per call it is cost-effective for high-volume screening pipelines.
Side effects
- Domain not found or unregistered — empty or error response
- Invalid domain format in query parameter — likely 400 error
- WHOIS data unavailable for certain TLDs — incomplete age data
- Payment failure via x402 — 402 response before data is returned
- Rate limiting if too many requests are made in succession
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"grade": "pass",
"domain": "example.com",
"registration": {
"age_days": 11389,
"registrar": {
"name": "RESERVED-Internet Assigned Numbers Authority",
"iana_id": "376"
}
}
}
}Tags
x402
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