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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 workflows.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 presence.
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://workflows.agentdiet.dev/v1/mx-check)
Output
Returns a structured object indicating whether the email passed syntax validation, whether the domain belongs to a known disposable or burner provider, whether the address is a role account (e.g. info@, admin@), and the live DNS status of MX, SPF, and DMARC records for the email's domain, giving a comprehensive deliverability picture.
Example use cases
Lead list email validation
“Before we import these leads into our CRM, can you verify that jane.smith@acmecorp.com is a legitimate, deliverable email — not a burner address or role account — and that the domain has proper MX and SPF records set up?”
Signup fraud detection
“A new user just registered with the email temp4829@mailinator.com — can you check if it's a disposable or burner email address so we can decide whether to block the signup?”
Cold outreach domain health check
“We're about to send a cold outreach campaign to contacts at techstartup.io — can you verify that support@techstartup.io has working MX records and proper DMARC and SPF configuration so our emails won't bounce?”
Technical details
Endpoint
GEThttps://workflows.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined, real-time check of email syntax, disposable provider detection, role account identification, and live DNS MX/SPF/DMARC verification in a single API call — particularly useful for lead enrichment pipelines, signup validation, or outbound email campaign hygiene where you need to confirm both the address format and the domain's mail infrastructure before sending.
Side effects
- Missing or malformed email parameter returns a validation error
- Domains with no public DNS records may return MX/SPF/DMARC as absent rather than invalid
- Temporary DNS timeouts may cause inconclusive MX lookup results
- Very new or private domains may not have SPF/DMARC configured, flagged as missing records
- Rate limiting or payment failure (x402) may block repeated calls
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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