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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 onchain-risk.agentdiet.dev, 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-based 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://onchain-risk.agentdiet.dev/v1/email-validator)
Output
Returns a structured object indicating whether the email has valid syntax, 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 status of MX, SPF, and DMARC records for the email's domain — together giving a composite deliverability assessment.
Example use cases
Pre-send lead list email scrub
“Before I import these leads into my CRM, check if contact@leads-company.io is a legitimate deliverable email — I need to know if it's a role account, whether the domain has MX records, and if it's from a disposable provider.”
Sign-up fraud prevention check
“A new user just registered with the email temp4567@mailnesia.com — can you tell me if it's a disposable or burner address so I can decide whether to block the signup?”
Cold outreach domain health audit
“I'm about to send a cold email campaign to prospects at acme-corp.com — can you verify that info@acme-corp.com has valid MX records and that the domain has SPF and DMARC policies configured so my emails won't bounce?”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/email-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive single-call email check that covers syntax, DNS deliverability (MX), email authentication policies (SPF/DMARC), disposable provider detection, and role account flagging — rather than a simple regex or single-factor validator. Especially useful for lead enrichment pipelines, signup fraud prevention, and pre-campaign list hygiene where live DNS resolution accuracy matters.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS timeout may cause MX/SPF/DMARC lookups to fail for slow-responding domains
- Unknown or very new domains may return empty DNS records even if legitimate
- Disposable provider detection relies on a maintained blocklist that may lag new burner services
- Payment failure (HTTP 402) if USDC balance is insufficient
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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