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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 whale-momentum.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-23).
Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX/SPF/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://whale-momentum.agentdiet.dev/v1/spf-dmarc-auditor)
Output
Returns a structured report indicating whether the email address passes syntax checks, whether the domain has live MX records (and which servers), whether SPF and DMARC DNS records exist and their contents, whether the provider is a known disposable/burner service, and whether the local part matches common role account patterns (e.g. info@, admin@, support@).
Example use cases
Screening signups for fake emails
“Before we onboard this new user, can you check if the email they provided — free2use@mailinator.com — is from a disposable provider or has valid MX and DNS records so we know it's a real address?”
B2B lead list email hygiene
“I have a sales lead with the email contact@startupxyz.io — can you verify it's deliverable, not a role account, and that the domain has proper SPF and DMARC records before we add them to our outreach campaign?”
Email infrastructure audit for a domain
“Can you audit the email setup for ceo@bigenterprise.com — specifically whether their domain has MX records pointing somewhere, valid SPF, and a DMARC policy in place?”
Technical details
Endpoint
POSThttps://whale-momentum.agentdiet.dev/v1/spf-dmarc-auditor?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single, comprehensive email health check that combines syntax validation, disposable provider detection, role account flagging, and live DNS MX/SPF/DMARC verification in one call. Prefer it over simple regex validators when you need real deliverability confidence, and over domain-only DNS tools when the unit of analysis is a full email address rather than just a domain. Particularly useful in B2B lead enrichment, signup fraud prevention, and pre-send email campaign hygiene workflows.
Side effects
- Malformed or empty email input returns a validation error
- DNS lookup timeouts if the domain's nameservers are slow or unreachable
- Unknown or newly registered domains may lack MX/SPF/DMARC records, returning empty results rather than errors
- Payment failure via x402 if the calling agent lacks sufficient USDC balance
- Rate limiting or idempotency key conflicts if the same key is reused across different requests
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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