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apiacre.com Email Authentication Posture Check
x402
apiacre.com Email Authentication Posture Check is a paid API for AI agents from apiacre.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Checks a public domain's email authentication and anti-spoofing configuration by inspecting MX, SPF, DMARC, DKIM, MTA-STS, TLS-RPT, and BIMI DNS records.
Price / call$0.005
Success—
StatusUnknown
How this service works
Check a public domain's email authentication and anti-spoofing posture using MX, SPF, DMARC, caller-selected DKIM, MTA-STS, TLS-RPT, and BIMI DNS evidence.
Output
Returns structured DNS evidence for the queried domain covering MX, SPF, DMARC (including policy enforcement level), caller-specified DKIM selector record, MTA-STS policy, TLS-RPT reporting address, and BIMI record — giving a complete picture of the domain's email authentication and anti-spoofing posture.
Example use cases
Pre-send domain security audit
“Before we start emailing customers from our new domain acmecorp.io, can you check its SPF, DMARC, MTA-STS, and TLS-RPT records to make sure everything is set up correctly to prevent spoofing?”
Vendor phishing risk assessment
“We're about to onboard payments.supplierco.com as a vendor — can you pull their full email authentication posture including DMARC policy, SPF, and DKIM with selector 'selector1' to see if they're vulnerable to phishing?”
BIMI brand display verification
“We set up BIMI for ourbrand.com last week — can you verify our BIMI DNS record is present and check that our SPF and DMARC are in enforcement mode so our logo should appear in email clients?”
Technical details
Endpoint
POSThttps://apiacre.com/v1/web/email-authWhen to prefer
Choose this endpoint when you need a comprehensive, multi-record email authentication audit in a single call covering SPF, DMARC, DKIM, MTA-STS, TLS-RPT, and BIMI together. Prefer it over manual dig/nslookup lookups or single-record checkers when you need structured, normalized JSON output suitable for automated agent workflows or compliance reporting.
Side effects
- Domain does not exist or has no DNS records — empty or error result per record type
- Invalid DKIM selector provided — DKIM check returns not-found or NXDOMAIN
- Domain is private or behind split-horizon DNS — records may be inaccessible
- Rate limiting or DNS resolver timeouts — transient failure with error response
- Malformed domain input — validation error returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | |
| dkim_selectors | array |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"spf": {
"records": [
"v=spf1 include:_spf.protonmail.ch ~all"
],
"configured": true,
"recordCount": 1,
"allQualifier": "softfail",
"multipleRecords": false
},
"dkim": {
"reason": null,
"checked": true,
"selectors": [
{
"revoked": false,
"selector": "protonmail",
"configured": true,
"recordCount": 1,
"multipleRecords": false
}
],
"checkedSelectors": [
"protonmail"
]
},
"dmarc": {
"policy": "quarantine",
"records": [
"v=DMARC1; p=quarantine"
],
"configured": true,
"recordCount": 1,
"multipleRecords": false
},
"domain": "apiacre.com",
"posture": {
"basis": "published DNS records only",
"status": "enforcing"
},
"findings": [],
"checkedAt": "2026-08-12T18:03:16+00:00",
"provenance": {
"source": "recursive DNS",
"queries": [
"apiacre.com A",
"apiacre.com AAAA",
"apiacre.com MX",
"apiacre.com TXT",
"_dmarc.apiacre.com TXT",
"protonmail._domainkey.apiacre.com TXT",
"_mta-sts.apiacre.com TXT",
"_smtp._tls.apiacre.com TXT",
"default._bimi.apiacre.com TXT"
],
"queryCount": 9
},
"limitations": [
"DNS answers are a time-specific recursive-resolver snapshot and may be cached.",
"DKIM is checked only for selectors explicitly supplied by the caller.",
"Published records do not prove delivery, domain ownership, sender identity, o..."
],
"mailRouting": {
"mode": "explicit_mx",
"nullMx": false,
"mxRecords": [
"10 mail.protonmail.ch.",
"20 mailsec.protonmail.ch."
],
"addressFallbackObserved": true
},
"collectionMs": 19,
"optionalPolicies": {
"bimi": {
"records": [],
"configured": false,
"recordCount": 0
},
"mtaSts": {
"records": [],
"configured": false,
"recordCount": 0
},
"tlsReporting": {
"records": [],
"configured": false,
"recordCount": 0
}
}
},
"meta": {
"cached": false,
"sources": [],
"warnings": [],
"duration_ms": 42,
"next_actions": []
},
"service": "web.email-auth",
"version": "1",
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a"
}
}Tags
x402
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