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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/mx-deliverability-verifier)
Output
Returns a structured object covering: email syntax validity, whether the domain is a known disposable/burner provider, whether it is a role-based address (e.g. info@, admin@), live MX record lookup results indicating whether the domain can receive mail, SPF record presence and content, and DMARC policy record status — giving an overall deliverability assessment.
Example use cases
Pre-send bounce prevention for outreach
“Before I send this sales email, can you verify that james.wilson@techstartup.io is actually deliverable — check the MX records and make sure the domain isn't missing SPF or DMARC?”
Fake signup detection at registration
“A new user just signed up with mailinator123@guerrillamail.com — can you check if that's a throwaway burner email so I can decide whether to block the account?”
CRM lead quality audit
“I have a lead with the email contact@globalventures.co — can you tell me if it's a role account, whether the domain has working mail servers, and if SPF and DMARC are configured properly?”
Technical details
Endpoint
GEThttps://x402broker.com/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email deliverability check that combines syntax validation, disposable/burner detection, role account flagging, and live DNS MX/SPF/DMARC verification in a single call — especially useful for B2B lead qualification, fraud prevention at signup, or pre-campaign email list hygiene. Prefer this over simple format-only validators when you need live DNS confirmation that the domain can actually receive mail.
Side effects
- Invalid or malformed email format returns a syntax error flag
- Domain does not exist or has no DNS records, resulting in MX lookup failure
- Temporary DNS resolution timeout may return inconclusive MX status
- Disposable provider list may not include newly created throwaway domains
- Payment required error (HTTP 402) if x402 payment is not attached or fails
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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