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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/DMARC record checks to assess deliverability.
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/spf-dmarc-auditor)
Output
Returns a structured JSON object indicating whether the email has valid syntax, whether the domain belongs to a known disposable or burner provider, whether it is a role account, and the live DNS lookup results for MX records (mail server availability), SPF record presence and validity, and DMARC policy configuration — giving a comprehensive deliverability and trustworthiness assessment.
Example use cases
Screening signups for fake emails
“Before I add this new user to my CRM, can you verify whether signup@mailinator.com is a real deliverable address or a throwaway burner account?”
Auditing B2B lead email quality
“I have a sales lead with the email cfo@globalventures.com — can you check if that domain has working MX records and proper SPF and DMARC setup so I know whether outreach will actually land?”
Blocking role accounts from newsletter
“Check if info@acmecorp.org is a role-based email address — I don't want to send my newsletter to generic inboxes like info@ or support@ that no one reads.”
Technical details
Endpoint
GEThttps://x402broker.com/v1/spf-dmarc-auditor?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, multi-signal email validation that goes beyond simple regex syntax checking — specifically when you need live DNS MX/SPF/DMARC verification combined with disposable provider and role account detection in a single API call. Prefer this over basic syntax validators when lead quality, email deliverability, or fraud prevention matters, such as during user registration, CRM enrichment, or outbound sales campaigns.
Side effects
- Missing or invalid email parameter returns a validation error
- Temporarily unresolvable DNS for a legitimate domain may produce false negatives on MX/SPF/DMARC checks
- Edge-case disposable providers not in blocklist may pass as valid
- Network timeouts on DNS lookups may cause incomplete results
- Malformed email strings may return syntax failure without further DNS checks
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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