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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, and 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://mcp-security.agentdiet.dev/v1/email)
Output
Returns structured data indicating email syntax validity, whether the domain is from a known disposable/burner provider, whether it appears to be a role account (e.g. info@, admin@), live DNS MX record presence and details, SPF record content, and DMARC policy record — together forming a comprehensive deliverability and trust assessment.
Example use cases
Screening sign-up form emails
“Before I add this new user to my CRM, can you check whether signup@tempmail.org is a legit email or a throwaway burner address, and confirm the domain actually has MX records?”
Pre-send B2B outreach validation
“I'm about to send cold outreach to sarah.jones@bigclient.io — can you verify it's syntactically valid, the domain has live MX records, and SPF and DMARC are configured so my emails won't bounce?”
Detecting role account submissions
“A lead just submitted info@somestartup.com through our contact form — can you check if that's a role account and whether the domain has proper email infrastructure set up?”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, multi-layer email validation that combines syntax checking, DNS MX reachability, disposable provider detection, and SPF/DMARC record inspection in a single call. Ideal for B2B lead qualification pipelines, user registration flows, and pre-send outreach verification where deliverability and trust signals all matter. Prefer over basic regex-only validators when live DNS checks and security record validation are required.
Side effects
- Invalid or malformed email input returns a syntax error or 400-level response
- DNS lookup timeouts for domains with slow or unreachable nameservers may result in incomplete MX/SPF/DMARC data
- Very new domains may lack MX/SPF/DMARC records even if legitimate
- Payment required (402) if USDC micropayment via x402 is not completed
- Rate limiting or quota exhaustion may return 429 errors
- Domains using non-standard or private DNS resolvers may yield inconclusive results
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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