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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 2026-10-23).
Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX/SPF/DMARC record existence.
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-validator)
Output
Returns a structured object indicating whether the email address passes syntax checks, whether the domain has live MX records (confirming mail can be delivered), SPF and DMARC DNS record presence, whether the provider is a known disposable/burner service, and whether the address is a role account (e.g. info@, admin@, support@).
Example use cases
Block disposable emails at signup
“Before I create an account for the user who entered temp-mail123@guerrillamail.com, check whether that email is from a disposable or burner provider and whether it has real MX records so I can decide if I should block the registration.”
Qualify B2B lead email before outreach
“I'm about to add contact@acmecorp.io to my sales outreach list — can you verify it has working MX records, valid SPF and DMARC DNS entries, and isn't a role-based address that would hurt my deliverability?”
Validate email list before email campaign
“Check the deliverability of newsletter-subscriber@techstartup.com — I need to know if the domain has MX records, whether SPF and DMARC are set up, and if it looks like a throwaway address before I send my campaign.”
Technical details
Endpoint
POSThttps://x402broker.com/v1/email-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single, comprehensive email health check covering syntax, DNS deliverability (MX), anti-spoofing records (SPF/DMARC), disposable provider detection, and role-account flagging in one call — ideal for lead qualification, user registration gating, or pre-campaign list hygiene where multiple signals matter together.
Side effects
- Invalid or missing email input returns a 400 validation error
- DNS lookup timeout for obscure or slow domains may yield inconclusive MX/SPF/DMARC results
- Payment failure or insufficient balance returns HTTP 402
- Newly registered domains may have propagating DNS records, causing false negatives on MX/SPF checks
- Extremely long or unusual TLDs may not resolve correctly
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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