Check a public domain's email authentication and anti-spoofing posture using MX, SPF, DMAR
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.
5000 (raw units)
price
1
calls / 30d
1
unique payers
2026-08-31
updated
Provider
apiacre.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0xa0BFa4f07281c9b248DC3AED2217836BcA24869B",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "5000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "B4CHWQeQn7GDLZD2aW6hpGG2bEseisBFLZYECA3HDLan",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "5000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"dkim_selectors": [
"protonmail"
],
"domain": "apiacre.com"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"data": {
"checkedAt": "2026-08-12T18:03:16+00:00",
"collectionMs": 19,
"dkim": {
"checked": true,
"checkedSelectors": [
"protonmail"
],
"reason": null,
"selectors": [
{
"configured": true,
"multipleRecords": false,
"recordCount": 1,
"revoked": false,
"selector": "protonmail"
}
]
},
"dmarc": {
"configured": true,
"multipleRecords": false,
"policy": "quarantine",
"recordCount": 1,
"records": [
"v=DMARC1; p=quarantine"
]
},
"domain": "apiacre.com",
"findings": [],
"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": {
"addressFallbackObserved": true,
"mode": "explicit_mx",
"mxRecords": [
"10 mail.protonmail.ch.",
"20 mailsec.protonmail.ch."
],
"nullMx": false
},
"optionalPolicies": {
"bimi": {
"configured": false,
"recordCount": 0,
"records": []
},
"mtaSts": {
"configured": false,
"recordCount": 0,
"records": []
},
"tlsReporting": {
"configured": false,
"recordCount": 0,
"records": []
}
},
"posture": {
"basis": "published DNS records only",
"status": "enforcing"
},
"provenance": {
"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,
"source": "recursive DNS"
},
"spf": {
"allQualifier": "softfail",
"configured": true,
"multipleRecords": false,
"recordCount": 1,
"records": [
"v=spf1 include:_spf.protonmail.ch ~all"
]
}
},
"meta": {
"cached": false,
"duration_ms": 42,
"next_actions": [],
"sources": [],
"warnings": []
},
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
"service": "web.email-auth",
"version": "1"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"dkim_selectors": {
"items": {
"type": "string"
},
"type": "array"
},
"domain": {
"type": "string"
}
},
"required": [
"domain"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"additionalProperties": false,
"properties": {
"checkedAt": {
"type": "string"
},
"collectionMs": {
"type": "integer"
},
"dkim": {
"type": "object"
},
"dmarc": {
"type": "object"
},
"domain": {
"type": "string"
},
"findings": {
"items": {
"type": "object"
},
"type": "array"
},
"limitations": {
"items": {
"type": "string"
},
"type": "array"
},
"mailRouting": {
"type": "object"
},
"optionalPolicies": {
"type": "object"
},
"posture": {
"type": "object"
},
"provenance": {
"type": "object"
},
"spf": {
"type": "object"
}
},
"required": [
"domain",
"mailRouting",
"spf",
"dmarc",
"dkim",
"optionalPolicies",
"posture",
"findings",
"provenance",
"limitations",
"checkedAt",
"collectionMs"
],
"type": "object"
},
"meta": {
"properties": {
"cached": {
"type": "boolean"
},
"duration_ms": {
"type": "integer"
},
"next_actions": {
"items": {
"type": "object"
},
"type": "array"
},
"sources": {
"items": {
"type": "string"
},
"type": "array"
},
"warnings": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"duration_ms",
"cached",
"sources",
"warnings",
"next_actions"
],
"type": "object"
},
"request_id": {
"type": "string"
},
"service": {
"type": "string"
},
"version": {
"type": "string"
}
},
"required": [
"request_id",
"service",
"version",
"data",
"meta"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"id": {
"maxLength": 128,
"minLength": 16,
"pattern": "^[a-zA-Z0-9_-]+$",
"type": "string"
},
"required": {
"type": "boolean"
}
},
"required": [
"required"
],
"type": "object"
}
}
}Use it
curl
curl "https://apiacre.com/v1/web/email-auth" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://apiacre.com/v1/web/email-auth");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://apiacre.com/v1/web/email-auth")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/2597.json, and this resource appears in /discovery/resources and /discovery/search.