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Email Authentication Check (SPF & DMARC)
x402
Email Authentication Check (SPF & DMARC) is a paid API for AI agents from domain-dns.x402tookit.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-21).
Parses and grades a domain's SPF and DMARC DNS records, assessing policy strength, configuration issues, and spoofing exposure.
Price / call$0.03
Success—
StatusUnknown
How this service works
Grade a domain's email authentication: SPF and DMARC records parsed, policy strength, and spoofing exposure.
Output
Returns a structured object with the raw SPF record (including all-qualifier, includes, and direct lookups), SPF policy strength, DMARC record (including policy, subdomain policy, pct, alignment modes, and reporting URIs), whether multiple conflicting records exist, a list of issues found, a human-readable summary, an overall spoofing verdict, and a timestamp of when the check was performed.
Example use cases
Pre-send domain security audit
“Before we start our email campaign from newsletter.acme.com, can you check whether SPF and DMARC are properly set up and tell me if there are any spoofing risks or misconfigurations I should fix?”
Vendor phishing risk assessment
“I'm worried about phishing from impersonated vendor emails — can you check the email authentication records for payments.bigvendor.com and tell me if their domain could be spoofed?”
Competitor email security benchmarking
“Can you pull the SPF and DMARC grades for competitor.com and let me know how strict their email authentication policy is compared to a best-practice setup?”
Technical details
Endpoint
GEThttps://domain-dns.x402tookit.com/email-auth-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need to assess a domain's email authentication posture — SPF and DMARC records, policy strength, and spoofing risk — rather than general DNS lookups. It is more focused than a full DNS record dump and provides interpreted verdicts and issue lists rather than raw records only. Prefer it over a generic TXT record lookup when you need structured analysis, policy grading, and actionable issue detection for email security audits.
Side effects
- Domain does not exist — returns null records with an issue indicating the domain is unresolvable
- No SPF record found — SPF present field is false, record is null
- No DMARC record found — DMARC present field is false
- Multiple SPF or DMARC records detected — flagged as a misconfiguration issue
- DNS lookup timeout or resolver failure — degraded flag set to true
- Invalid domain format supplied — input validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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