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B2A Email Deliverability, MX, SPF & DMARC Verifier
B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from x402-audit.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-21).
Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX, SPF, and DMARC record checks.
Price / call$0.005
Success—
StatusUnknown
How this service works
Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMARC records. (Live x402 v2, IETF MPP & MCP endpoint at https://x402-audit.agentdiet.dev/v1/mx-deliverability-verifier)
Output
Returns a structured object containing: email syntax validity, whether the domain uses a known disposable/burner email provider, whether the address is a role account (e.g. info@, support@), live DNS MX record presence and details, SPF record presence and content, and DMARC record presence and policy — giving a comprehensive deliverability and legitimacy verdict.
Example use cases
Screening signups for fake emails
“Before we activate this new user account, check if the email they signed up with — freestuff2024@mailinator.com — is from a disposable provider or has working MX records.”
Lead list quality audit
“I've got a sales lead with the email contact@acmecorp.io — can you verify it's deliverable, not a role alias, and that the domain has valid SPF and DMARC records set up?”
Pre-send email campaign validation
“We're about to blast a campaign to newsletter@techstartup.dev — first check if that address has live MX records, valid SPF, and DMARC configured so we don't hurt our sender reputation.”
Technical details
Endpoint
GEThttps://x402-audit.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email verification that goes beyond simple syntax checking — specifically when you need live DNS MX, SPF, and DMARC record lookups combined with disposable provider and role account detection in a single call. Prefer it over basic regex validators when building lead enrichment pipelines, fraud prevention workflows, or pre-send email campaign quality gates.
Side effects
- Missing or malformed email parameter returns a validation error
- Non-existent domain with no DNS records may return MX lookup failure
- Temporary DNS timeouts may cause inconclusive MX/SPF/DMARC results
- Very new domains may not yet have propagated DNS records, yielding false negatives
- Payment not settled via x402 returns HTTP 402 before any result is provided
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| emailrequired | string | Email address to validate for syntax, MX deliverability, and disposable risk |
Output
Schema · Response
{
"type": "object"
}Reviews
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