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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 defi-yield.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 health.
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://defi-yield.agentdiet.dev/v1/spf-dmarc-auditor)
Output
Returns a structured object indicating email syntax validity, whether the provider is a known disposable/burner service, whether the address appears to be a role account (e.g. admin@, info@), and the live DNS status of MX records (mail server reachability), SPF policy record, and DMARC policy record for the domain.
Example use cases
Screening lead capture form submissions
“Before we add this lead to our CRM, can you verify that 'sarah.jones@tempmail.io' is a legitimate email — check if it's disposable, if MX records exist, and whether SPF and DMARC are configured?”
Auditing outreach list email quality
“I have a contact email 'partnerships@bigcorp.com' — can you check if it's a role account, confirm the domain has working MX records, and tell me whether SPF and DMARC are properly set up?”
Pre-send deliverability check for transactional email
“We're about to send a password reset to 'user123@fastmail.com' — can you quickly verify it's syntactically valid, not a burner address, and that the domain's DNS records will actually accept delivery?”
Technical details
Endpoint
GEThttps://defi-yield.agentdiet.dev/v1/spf-dmarc-auditor?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, multi-signal email validation that goes beyond simple regex — specifically when you need live DNS MX reachability, SPF/DMARC policy inspection, and disposable/burner provider detection in a single call. Prefer it over basic syntax checkers when deliverability and domain security posture matter, such as before adding contacts to a CRM, validating user signups, or auditing outreach lists.
Side effects
- Invalid or missing email parameter returns a validation error
- DNS lookup timeout if the domain's nameservers are slow or unreachable
- Unrecognized disposable providers may not be flagged if not in the blocklist
- Role-account detection limited to common prefixes; custom role accounts may be missed
- Non-existent domains return MX/SPF/DMARC as absent but won't indicate typos
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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