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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 domain status, role-account detection, and live DNS MX, SPF, and DMARC record presence.
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-check)
Output
Returns a structured object indicating email syntax validity, whether the domain belongs to a known disposable/burner provider, whether it is a role-based account (e.g. info@, admin@), and the live DNS lookup results for MX, SPF, and DMARC records including their presence and values.
Example use cases
Lead list hygiene before outreach
“I have a sales lead with the email contact@prospectco.io — can you verify it's actually deliverable, has proper MX and SPF records, and isn't a throwaway address before I add them to my outreach sequence?”
Sign-up fraud prevention check
“A new user just signed up with the email user1234@mailnull.com — can you check if that's a disposable or burner email provider and whether the domain even has real MX records?”
B2B email infrastructure audit
“Before we start emailing partnerships@bigenterprise.com, can you confirm the domain has valid MX, SPF, and DMARC records set up so our messages won't bounce or go to spam?”
Technical details
Endpoint
GEThttps://x402broker.com/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email validation that combines syntax checking, live DNS MX/SPF/DMARC record verification, and disposable/burner domain detection together — especially in agentic B2A workflows requiring micropayment-native HTTP 402 integration. Prefer it over basic regex-only validators when deliverability assurance and spam/fraud risk signals are both required.
Side effects
- Invalid or missing email parameter returns an error
- DNS lookup timeout if the domain's nameservers are unresponsive
- Disposable provider list may not cover all newly created throwaway services
- Role-account detection based on prefix heuristics may have edge cases
- Payment failure via x402 protocol results in 402 response before validation occurs
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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