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DomainCheck
x402
DomainCheck is a paid API for AI agents from api.youraitools.co, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-27).
Performs a comprehensive DNS, email security, and domain registration check on any domain, URL, or email address, returning a risk score and verdict.
Price / call$0.002
Success—
StatusUnknown
How this service works
Domain trust report for AI agents: is this domain real, how old is it, who registered it, and is its email locked down? DNS (A/AAAA/NS/MX/CAA), DNSSEC, SPF, DMARC, DKIM (common selectors), MTA-STS, TLS-RPT, BIMI, RDAP registration date + registrar + status, parking and disposable detection, risk flags, 0-100 score and verdict. Public DNS + RDAP, no data stored.
Output
Returns a JSON object containing: DNS records (A, AAAA, MX, NS, CNAME, CAA, TXT count, DNSSEC validation), email security analysis (SPF, DKIM, DMARC, BIMI, MTA-STS, TLS-RPT, overall email grade, whether the domain accepts mail), domain registration details (created/expires dates, registrar, age in days, status flags), a numeric risk score (0–100), a risk verdict string (e.g. 'low_risk'), a list of risk flags with severity and description, the engine version used, and total DNS queries performed.
Example use cases
Vendor domain trust assessment
“Before we process this invoice, can you check the domain 'globalpayments-invoices.com' and tell me whether it's legitimate — specifically the registration age, who owns it, and its risk verdict?”
Email security audit for outbound sender
“We're about to start sending marketing emails from 'newsletters.acmecorp.io' — can you check whether the domain has a proper SPF, DKIM, and DMARC setup and what email security grade it gets?”
Phishing link domain investigation
“Someone just sent me a link to 'secure-banking-login.net' — can you look up the DNS records, registration date, and risk score for that domain so I can tell if it's a phishing site?”
Technical details
Endpoint
GEThttps://api.youraitools.co/domaincheck/v1/domain?utm_source=zero.xyzWhen to prefer
Choose DomainCheck when you need a single, all-in-one domain intelligence call that combines DNS records, email security posture (SPF/DKIM/DMARC), WHOIS registration data, and a scored risk verdict. It is ideal for trust-and-safety workflows, phishing triage, vendor vetting, or email deliverability audits. Prefer it over raw DNS lookup tools when you need the aggregated email security grade and risk score, and over WHOIS-only tools when DNS and email security data are also required.
Side effects
- Domain not found or does not exist — 'exists' field returns false
- Invalid input format (non-domain string) — schema validation error
- RDAP/WHOIS lookup failure for registration data — registration fields may be null
- DNS resolution timeout — partial results with degraded score
- IDN encoding errors for internationalized domain names
- Rate limiting or payment failure — 402 response if USDC payment not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ms": 180,
"dns": {
"a": [
"172.66.147.243",
"104.20.23.154"
],
"mx": [],
"ns": [
"hera.ns.cloudflare.com",
"elliott.ns.cloudflare.com"
],
"caa": [],
"aaaa": [
"2606:4700:10::6814:179a",
"2606:4700:10::ac42:93f3"
],
"cname": [],
"null_mx": true,
"txt_count": 2,
"dnssec_validated": true
},
"tier": "full",
"email": {
"spf": {
"all": "-all",
"policy": "fail",
"record": "v=spf1 -all",
"present": true,
"includes": [],
"multiple": false,
"redirect": null,
"invalid_terms": [],
"dns_lookups_top_level": 0
},
"bimi": {
"present": false
},
"dkim": {
"note": "DKIM selectors cannot be enumerated; only common selectors are checked, so none found does not mean DKIM is absent.",
"selectors_found": [],
"revoked_selectors": 10,
"selectors_checked": 10
},
"dmarc": {
"pct": 100,
"rua": false,
"ruf": false,
"aspf": "s",
"adkim": "s",
"policy": "reject",
"record": "v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s",
"present": true,
"multiple": false,
"inherited_from": null,
"subdomain_policy": "reject"
},
"grade": "A",
"mta_sts": {
"present": false
},
"tls_rpt": {
"present": false
},
"mx_provider": null,
"accepts_mail": false
},
"flags": [
{
"id": "null_mx",
"penalty": 10,
"severity": "medium",
"description": "Null MX (RFC 7505): the domain explicitly accepts no email."
}
],
"input": "example.com",
"score": 90,
"domain": "example.com",
"engine": "domaincheck-2026.10.21",
"exists": true,
"verdict": "low_risk",
"dns_queries": 20,
"registration": {
"found": true,
"domain": "example.com",
"server": "https://rdap.verisign.com/com/v1/",
"source": "iana-bootstrap",
"status": [
"client delete prohibited",
"client transfer prohibited",
"client update prohibited"
],
"created": "1995-08-14T04:00:00Z",
"expires": "2027-08-13T04:00:00Z",
"age_days": 11391,
"available": true,
"registrar": "RESERVED-Internet Assigned Numbers Authority",
"nameservers": [
"elliott.ns.cloudflare.com",
"hera.ns.cloudflare.com"
],
"dnssec_signed": true,
"expires_in_days": 295,
"registrar_iana_id": "376"
},
"public_suffix": "com",
"registrable_domain": "example.com"
}
}Tags
x402
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