2s Domain Email Security Audit

x402

2s Domain Email Security Audit is a paid API for AI agents from 2s.io, paid per call via x402, $0.0018/call, status unknown (last checked 2026-10-12).

Audits a domain's email security configuration by checking SPF, DKIM, DMARC, BIMI, DNSSEC, MTA-STS, and CAA DNS records and returning a grade and spoofing-protection summary.

Price / call$0.0018

Seller volume →—

Success—

StatusUnknown

How this service works

Grade a domain's email-authentication and DNS-security posture from live DNS in one call: SPF, DMARC (policy + alignment), DKIM (for the supplied or common selectors), MTA-STS, TLS-RPT, DNSSEC, CAA, and BIMI. Pass domain (and optional dkimSelector). Returns an overall letter grade, a summary (spf/dmarcPolicy/dkim/mtaSts/dnssec/caa/bimi + spoofingProtected), and a per-mechanism block with the raw record, parsed tags, and specific issues (e.g. 'DMARC p=none — monitor only', 'SPF ~all soft-fail', 'no MTA-STS'). Sourced from live public DNS via DNS-over-HTTPS — an LLM cannot know a domain's current records. For deliverability/anti-spoofing audits, vendor security review, and phishing-resistance checks. DKIM is selector-based (selectors aren't enumerable), so 'not found' only means none of the checked selectors resolved.

Output

Returns a JSON object with an overall letter grade (e.g. 'A'), a summary boolean for each record type (SPF, DKIM, DMARC, BIMI, DNSSEC, MTA-STS, CAA), the raw DMARC record string, parsed DMARC policy fields, a list of detected issues, and a spoofingProtected flag. Sourced from live DNS-over-HTTPS queries.

Example use cases

Example prompt

“Can you run a full email security audit on paypal.com — check its DMARC, SPF, DKIM, DNSSEC, MTA-STS and everything else, and tell me what grade it gets and whether it's protected against spoofing?”

Technical details

Endpoint

GEThttps://2s.io/api/domain/email-security?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a comprehensive, multi-record email security posture check for a domain in a single call — covering SPF, DKIM, DMARC, BIMI, DNSSEC, MTA-STS, and CAA together with an overall grade and spoofing-protection verdict. Prefer it over manual DNS lookups or single-record checkers when you want a holistic audit with structured output and no API key overhead.

Side effects

Domain does not exist or has no DNS records — returns empty items array
Invalid domain format — likely 400 error or empty result
DKIM check inconclusive if no selector is provided or selector is wrong
Payment not received — 402 response, call not executed
Transient DNS resolution failure — may return partial data or error

Input

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "domain": "example.com"
    }
  }
}

Schema · Request body

Field	Type	Description
inputrequired	object

Output

{
  "data": {
    "ok": true,
    "items": [
      {
        "caa": {
          "issues": [
            "no CAA record — any CA may issue certs for this domain"
          ],
          "record": null,
          "issuers": [],
          "present": false
        },
        "spf": {
          "issues": [],
          "record": "v=spf1 -all",
          "present": true
        },
        "bimi": {
          "issues": [],
          "record": null,
          "present": false
        },
        "dkim": {
          "issues": [],
          "record": "8 selector(s) found",
          "present": true,
          "selectorsFound": [
            "default",
            "google",
            "selector1",
            "selector2",
            "k1",
            "mail",
            "s1",
            "dkim"
          ],
          "selectorsChecked": [
            "default",
            "google",
            "selector1",
            "selector2",
            "k1",
            "mail",
            "s1",
            "dkim"
          ]
        },
        "note": "Posture from live DNS records. DKIM is selector-based (selectors are not enumerable) — a \"not found\" only means none of the checked selectors resolved. Not a guarantee of deliverability.",
        "dmarc": {
          "issues": [
            "no rua= aggregate-report address"
          ],
          "parsed": {
            "p": "reject",
            "v": "DMARC1",
            "sp": "reject",
            "aspf": "s",
            "adkim": "s"
          },
          "record": "v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s",
          "present": true
        },
        "grade": "B",
        "dnssec": {
          "enabled": true
        },
        "domain": "example.com",
        "mtaSts": {
          "issues": [
            "no MTA-STS — SMTP downgrade attacks not prevented"
          ],
          "record": null,
          "present": false
        },
        "source": {
          "url": "https://developers.google.com/speed/public-dns/docs/doh",
          "license": "Live DNS queries; public records, no upstream license.",
          "provider": "Live DNS via public DNS-over-HTTPS resolvers"
        },
        "tlsRpt": {
          "issues": [],
          "record": null,
          "present": false
        },
        "summary": {
          "caa": false,
          "spf": true,
          "bimi": false,
          "dkim": true,
          "dnssec": true,
          "mtaSts": false,
          "dmarcPolicy": "reject",
          "spoofingProtected": true
        }
      }
    ],
    "total": 1,
    "source": {
      "url": "https://developers.google.com/speed/public-dns/docs/doh",
      "license": "Live DNS queries; public records, no upstream license.",
      "provider": "Live DNS via public DNS-over-HTTPS resolvers"
    }
  },
  "meta": {
    "cost": {
      "usd": 0.0018,
      "tier": 0
    },
    "caller": "x402",
    "version": null,
    "endpoint": "domain.email-security",
    "settlement": {
      "txHash": "0x615f3262e84237a015eaa7b2f5f687b993e21f22bb7567a78f7b3369b92ee22c",
      "network": "eip155:8453",
      "success": true
    }
  }
}

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