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Domain Trust Check (DNS, Email Auth, TLS, Headers)
x402
Domain Trust Check (DNS, Email Auth, TLS, Headers) is a paid API for AI agents from domain-check-production-6228.up.railway.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-17).
Performs live technical security checks on a domain including DNS records, SPF/DMARC email authentication, DNSSEC, TLS certificate validity, and HTTPS security headers, returning a risk flag list.
Price / call$0.003
Success—
StatusUnknown
How this service works
Live technical checks of a domain, measured by us at request time: A/AAAA, NS, MX records, SPF and DMARC policies, DNSSEC presence (DS), CAA, TLS certificate issuer, validity dates and hostname match on port 443, and HTTPS security headers (HSTS, CSP, X-Frame-Options). Returns a simple risk flag list. Use when an agent must sanity-check a company's or vendor's domain before trusting an email, link or supplier: does it resolve, receive mail, publish SPF/DMARC, and serve a valid TLS certificate.
Output
Returns a JSON object with: DNS resolution status (resolves boolean), MX records with priority, SPF record text, DMARC policy, TLS certificate details (issuer, valid_to date, hostname match, validity boolean), HTTPS security headers (HSTS, CSP, X-Frame-Options), DNSSEC/CAA presence, overall status field, and a flags array listing detected risk issues. An empty flags array indicates no issues found.
Example use cases
Vendor onboarding domain vetting
“I'm about to onboard a new software supplier and they gave me their domain techsupplyco.com — can you check if it resolves, has valid MX and SPF records, a DMARC reject policy, and a legit TLS certificate before I send them any sensitive info?”
Phishing email sender verification
“I got an email from billing@globalfinancepartners.net and I'm not sure it's legit — can you do a full domain check on globalfinancepartners.net to see if the DNS resolves, SPF and DMARC are set up correctly, and the TLS cert is valid?”
Security audit of partner domain
“Run a domain security audit on stripe.com for me — I want to see their DNS records, whether DNSSEC is enabled, what their DMARC policy is, who issued their TLS cert, and whether they have HSTS and CSP headers set.”
Technical details
Endpoint
GEThttps://domain-check-production-6228.up.railway.app/v1/domain/check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs a live, real-time technical trust assessment of a domain before acting on an email, link, or supplier relationship — especially when you need all of DNS, email auth (SPF/DMARC), TLS certificate validity, and HTTPS headers checked in a single call. Prefer this over manual DNS lookups or separate TLS checkers when you want a consolidated risk flag list with no setup required. Best for pre-flight checks in automated supplier onboarding, phishing triage, or security compliance workflows.
Side effects
- Domain does not resolve — resolves:false with empty DNS records
- Invalid domain format input — likely 4xx error or error status in response
- TLS check fails if port 443 is not open or certificate is expired — reflected in tls.valid:false
- DMARC or SPF absent — reflected as null/missing fields rather than a hard error
- Network timeout reaching the target domain — may return partial results or error status
- Railway hosting outage causing the service itself to be unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"mx": [
{
"exchange": "mx.example.com",
"priority": 10
}
],
"spf": "v=spf1 -all",
"tls": {
"valid": true,
"issuer": "DigiCert",
"valid_to": "2027-01-15",
"hostname_match": true
},
"dmarc": {
"policy": "reject"
},
"flags": [],
"legal": {
"terms": "https://domain-check-production-6228.up.railway.app/terms",
"privacy": "https://domain-check-production-6228.up.railway.app/privacy"
},
"domain": "example.com",
"status": "ok",
"headers": {
"hsts": true
},
"resolves": true,
"use_when": "Use when an agent must sanity-check a company's or vendor's domain before trusting an email, link or supplier: does it resolve, receive mail, publish SPF/DMARC, and serve a valid TLS certificate."
}
}Tags
x402
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