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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 mcp-security.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/DMARC record verification to assess deliverability risk.
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://mcp-security.agentdiet.dev/v1/mx-deliverability-verifier)
Output
Returns a structured object indicating email syntax validity, whether the domain belongs to a known disposable/burner provider, whether it is a role-based account (e.g. admin@, noreply@), and live DNS lookup results including MX record presence, SPF record content, and DMARC policy status — enabling a holistic deliverability risk assessment.
Example use cases
Screening signups for fake emails
“We're getting a lot of new user signups and I'm worried some are using throwaway email addresses. Can you check whether the email they gave us — freestuff2024@mailinator.com — is a disposable or burner address and whether it can actually receive mail?”
Pre-send lead list email hygiene
“Before I send this outreach campaign, can you verify that cto@prospectcompany.io is a real, deliverable address — check the MX records, SPF, and DMARC on that domain, and flag it if it looks like a role account?”
Diagnosing email bounce investigation
“Our transactional emails to support@clientdomain.com keep bouncing. Can you check the live MX, SPF, and DMARC DNS records for that address to figure out if it's a DNS misconfiguration on their end?”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email health check covering syntax, live DNS MX/SPF/DMARC records, and disposable/role-account detection together — rather than calling separate DNS lookup, SMTP ping, or email validation tools individually. Ideal for pre-campaign list hygiene, CRM data enrichment, and user signup screening where both DNS infrastructure and provider reputation matter.
Side effects
- Invalid or malformed email address syntax returns a syntax error flag
- Domain with no MX records returns MX lookup failure
- DNS timeout for slow or unreachable domains may cause incomplete results
- Disposable provider list may not include brand-new burner services
- Network errors reaching DNS resolvers return service errors
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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