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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 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://polymarket-odds.agentdiet.dev/v1/email-check)
Output
Returns a structured object indicating whether the email address passes syntax validation, whether the domain has live MX records confirming deliverability, whether SPF and DMARC DNS records are present, whether the provider is a known disposable/burner service, and whether the address is a role-based account (e.g. info@, admin@).
Example use cases
Signup form disposable email screening
“Before we create an account, check if the email address temp-user@mailinator.com is from a disposable or burner provider and whether it has working MX records.”
B2B lead email validation before CRM import
“I have a new lead with email contact@prospectcompany.io — can you verify it's deliverable, not a role account, and that the domain has proper SPF and DMARC DNS records before I add it to the CRM?”
Email list hygiene audit
“Run a deliverability check on newsletter-subscriber@yopmail.com and tell me if it's a real inbox — check its syntax, MX records, and whether it's flagged as a disposable address.”
Technical details
Endpoint
GEThttps://polymarket-odds.agentdiet.dev/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a multi-signal email validation that goes beyond simple regex syntax checks — specifically when you need live DNS MX/SPF/DMARC lookups combined with disposable-provider and role-account detection in a single call. Ideal for signup fraud prevention, B2B lead qualification, or CRM hygiene workflows where email deliverability and legitimacy both matter. Prefer this over generic syntax validators when DNS-level verification and burner-email screening are both required.
Side effects
- Missing or invalid email parameter returns a 400-level error
- DNS lookup timeout for obscure or unreachable domains may delay or fail MX resolution
- Disposable provider detection may miss newly created burner services not yet in blocklists
- Role-account heuristics may produce false positives for legitimate custom aliases
- Payment not fulfilled (HTTP 402) if USDC micropayment is not properly submitted
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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