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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 account detection, and live DNS MX/SPF/DMARC record checks to confirm 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)
Output
Returns a structured object indicating whether the email passes syntax validation, whether the provider is flagged as disposable or a burner service, whether the address is a role account (e.g. info@, admin@), and the live DNS lookup results for MX, SPF, and DMARC records on the domain, collectively indicating whether the email is likely deliverable.
Example use cases
Screening sign-up emails for fake accounts
“Before I create an account for this new user, can you verify that signup@tempmail.io is a legitimate email — not a disposable burner address — and that the domain actually has MX records set up so we can reach them?”
Pre-send deliverability check for outreach
“I'm about to send a cold email to ceo@prospectcorp.com — can you check if that address looks valid, the domain has working MX records, and whether SPF and DMARC are properly configured so my email won't bounce or get rejected?”
Fraud detection on user-submitted contact forms
“A contact form submission came in from noreply@fakebiz.net — can you run a full email check on it to see if it's a role account, from a disposable provider, or if the domain is missing mail server records?”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, multi-signal email validation that goes beyond simple syntax checking — specifically when you need live DNS verification of MX, SPF, and DMARC records alongside disposable provider and role account detection in a single call. Prefer it over lightweight regex-only validators when email deliverability and fraud screening both matter, such as before sending outreach emails, onboarding new users, or enriching B2B lead data.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS timeout or unreachable nameservers may cause MX/SPF/DMARC checks to fail or return inconclusive results
- Newly registered domains may not yet have propagated DNS records, leading to false negatives
- Disposable provider database may not cover every burner service, leading to missed detections
- Payment (x402) not fulfilled results in HTTP 402 response blocking the query
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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