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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 x402broker.com, 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://x402broker.com/v1/email)
Output
Returns a structured object indicating: whether the email syntax is valid, whether the provider is disposable or a burner service, whether the address is a role account (e.g. info@, admin@), and live DNS lookup results for MX records (mail server existence), SPF policy, and DMARC policy — giving an overall deliverability assessment.
Example use cases
Screen sign-up email for fraud
“Before I create an account for this new user, can you verify that their email address signup123@tempmail.io isn't from a disposable or burner service and actually has working mail server records?”
Pre-send deliverability check
“I'm about to send a contract to alice@partnercorp.com — can you confirm that email address is syntactically valid, not a role account, and that the domain has proper MX, SPF, and DMARC records set up?”
B2B lead list email hygiene
“I have a lead email address contact@acmecorp.com — can you verify it's deliverable, check if their domain has MX and DMARC configured, and flag if it looks like a generic role account?”
Technical details
Endpoint
GEThttps://x402broker.com/v1/email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email verification that combines syntax checking, disposable/burner detection, role account flagging, and live DNS MX/SPF/DMARC validation — especially useful for B2B lead enrichment, user registration fraud prevention, or pre-send deliverability assurance. Prefer it over basic syntax validators when live DNS verification is required, and over domain-only DNS tools when per-address disposable and role account screening matters.
Side effects
- Missing or malformed email parameter returns an error
- DNS lookup timeout for domains with slow or unresponsive name servers
- Newly created domains may lack MX/SPF/DMARC records causing false negatives
- Disposable provider list may not include all newly created throwaway services
- Payment failure via x402 protocol prevents endpoint access
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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