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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 polymarket-odds.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 verification.
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://polymarket-odds.agentdiet.dev/v1/mx-check)
Output
Returns a structured object indicating whether the email passes syntax checks, whether the domain uses a known disposable/burner provider, whether the address is a role account (e.g. info@, support@), and the live DNS lookup results for MX, SPF, and DMARC records — enabling a full deliverability and fraud-risk assessment.
Example use cases
Lead quality screening before outreach
“Before we add these leads to our sales sequence, check whether contact@startupxyz.io is a legitimate deliverable email — I want to know if the domain has MX records set up and whether it's a role account or disposable address.”
User registration fraud prevention
“Someone just signed up with temp-user@guerrillamail.com — can you verify if that's a disposable or burner email so we can decide whether to block the registration?”
Email infrastructure audit for a partner domain
“We're about to partner with a company whose main contact uses ceo@bigpartner.net — can you check if that domain has valid MX, SPF, and DMARC records configured so we know their email infrastructure is legit?”
Technical details
Endpoint
GEThttps://polymarket-odds.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive single-call email verification covering syntax, DNS infrastructure (MX, SPF, DMARC), disposable provider detection, and role account flagging — especially in B2B lead qualification, fraud prevention at signup, or CRM data hygiene workflows. Prefer this over simple regex validators when live DNS verification and deliverability signals are required.
Side effects
- Missing or invalid email parameter returns a validation error
- DNS lookup timeout if the target domain's nameservers are slow or unresponsive
- Domain does not exist — MX/SPF/DMARC checks return empty or NXDOMAIN
- Payment failure via x402 if USDC balance is insufficient
- Rate limiting if too many requests are sent in a short window
- Ambiguous results for newly registered domains with incomplete DNS propagation
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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