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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 preflight.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 existence.
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://preflight.agentdiet.dev/v1/disposable-email)
Output
Returns a structured object indicating email syntax validity, whether the domain is from a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), and whether live DNS records exist for MX, SPF, and DMARC on the domain — giving a full deliverability and authenticity picture.
Example use cases
Screen signups for throwaway emails
“Before I add this new user to my database, can you verify that signup@mailinator.com isn't a disposable or burner email and that the domain actually has MX records configured for delivery?”
Qualify B2B sales leads
“I have a lead who gave me the email ceo@acmecorp.io — can you check if it's a real deliverable address, not a role account, and whether the domain has proper MX and DMARC records before I reach out?”
Audit email list before campaign
“I'm about to send a newsletter campaign — can you check whether noreply@techstartup.com is a role account and whether the domain has SPF and MX records so I don't waste sends on undeliverable addresses?”
Technical details
Endpoint
GEThttps://preflight.agentdiet.dev/v1/disposable-email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, multi-signal email check in a single call — covering syntax, disposable detection, role-account identification, and live DNS record validation (MX, SPF, DMARC) simultaneously. Prefer it over simple regex validators when you need real DNS lookup results, or over generic email verification APIs when you also need DMARC/SPF intelligence. Best suited for agent workflows that gate user onboarding, qualify B2B leads, or pre-screen mailing lists before sending.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts may cause MX/SPF/DMARC checks to fail or return incomplete results
- Unknown or newly registered domains may have no DNS records, returning empty MX/SPF/DMARC results
- Disposable provider database may lag behind newly created burner services
- Payment failure (HTTP 402) if USDC balance is insufficient for the $0.005 per-call fee
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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