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toolvend.dev Email Authentication Posture Check
x402
toolvend.dev Email Authentication Posture Check is a paid API for AI agents from toolvend.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Fetches and parses DMARC and SPF DNS records for a domain, scoring email authentication posture 0-100 with detailed findings and fix recommendations.
Price / call$0.01
Success—
StatusUnknown
How this service works
Email authentication posture for a domain: DMARC + SPF records fetched, parsed, scored 0-100, with findings and fix recommendations.
Output
Returns parsed DMARC and SPF DNS records for the queried domain, a numeric posture score from 0 to 100, a list of specific findings (e.g. missing p= policy, overly permissive SPF), and actionable fix recommendations prioritized by severity.
Example use cases
Pre-send deliverability audit
“Before we launch our email campaign, can you check the DMARC and SPF setup for ourbrand.com and tell me if there's anything that could hurt deliverability or cause emails to land in spam?”
Vendor security due diligence
“We're onboarding a new supplier at supplier-corp.com — can you check their email authentication posture and score, so I know if they're likely to be spoofed in phishing attacks against us?”
Post-migration DNS verification
“We just moved our domain registrar for techstartup.io — can you check whether the DMARC and SPF records are still correctly configured and flag any issues that need fixing?”
Technical details
Endpoint
GEThttps://toolvend.dev/email-auth/:var1When to prefer
Use this endpoint when you need a quick, scored, and actionable assessment of a domain's email authentication posture (DMARC + SPF) without standing up your own DNS parsing infrastructure. It is ideal for security audits, vendor due diligence, pre-campaign deliverability checks, or automated monitoring pipelines. Prefer this over raw DNS lookup tools when you need structured scoring and human-readable fix recommendations rather than raw record text.
Side effects
- Domain does not exist or is not registered — DNS lookup fails with no records returned
- Domain has no DMARC or SPF records published — returns score of 0 with findings indicating absence
- Malformed or syntactically invalid DMARC/SPF records — parsing errors noted in findings
- DNS resolution timeout — transient failure, retry recommended
- Invalid domain name format passed in URL path — likely returns 4xx error
Tags
x402
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