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SiteCheck Web Intel — DMARC / SPF / DKIM Email Authentication DNS Lookup
x402
SiteCheck Web Intel — DMARC / SPF / DKIM Email Authentication DNS Lookup is a paid API for AI agents from api.webintel-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).
Retrieves and parses a domain's email authentication DNS records: DMARC policy, SPF mechanisms, and DKIM public keys (auto-probing 8 common selectors or a user-specified one)
Price / call$0.002
Success—
StatusUnknown
How this service works
Email authentication DNS records for a domain: DMARC policy (p, sp, pct, rua), SPF record and its all-mechanism, and DKIM public keys for a selector you give or for 8 common selectors (revoked keys and CNAME-delegated keys are reported). Reads the published DNS records only; it does not check alignment against a real message.
Output
Returns the parsed DMARC TXT record with its policy fields (p, sp, pct, rua), the raw SPF TXT record and its 'all' mechanism (+/-/~/?all), and DKIM public key entries for the specified selector or up to 8 probed common selectors — including flags for revoked keys and CNAME-delegated keys.
Example use cases
Audit new vendor domain email security
“I'm onboarding a new vendor and want to make sure they have proper email authentication set up — can you pull the DMARC policy, SPF record, and DKIM keys for acmecorp.com?”
Debug email deliverability for own domain
“Our emails keep landing in spam — can you check what DMARC and SPF records are published for mailchimp.com and whether there's a valid DKIM key for the 'k1' selector?”
Security audit for phishing risk assessment
“I need to assess phishing risk for paypal.com — look up their DMARC policy (especially whether it's reject or quarantine) and check what DKIM selectors are active.”
Technical details
Endpoint
GEThttps://api.webintel-api.workers.dev/api/security/dmarc-spf-dkim?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, consolidated read of all three email authentication DNS standards (DMARC, SPF, DKIM) for a domain in a single call, especially when you want DKIM auto-probing across common selectors without specifying one. Prefer it over generic DNS lookup endpoints when you need parsed, semantically labeled DMARC fields (policy, subpolicy, pct, rua) rather than raw TXT strings.
Side effects
- Domain does not exist or has no DNS records — empty or error response
- Domain has no DMARC record published — DMARC section absent or null
- Domain has no SPF record — SPF section absent
- Specified DKIM selector has no TXT record — key not found for that selector
- All 8 common selectors probed return no DKIM records — empty DKIM section
- Transient DNS resolution failures from upstream AdGuard resolver
- Invalid domain format in query parameter — likely a 400 or error body
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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