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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, 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://onchain-risk.agentdiet.dev/v1/mx-check)
Output
Returns a structured object indicating whether the email passes syntax validation, whether the domain uses a known disposable or burner provider, whether the address is a role account (e.g. admin@, noreply@), and the live DNS lookup results for MX, SPF, and DMARC records including their presence and values.
Example use cases
Lead list email hygiene cleanup
“Before we import this lead list, check whether sarah.jones@techventures.io is actually deliverable — does the domain have working MX records, and is it a disposable or burner email provider?”
Fraud signup detection at registration
“A new user just signed up with noreply@mailinator.com — can you verify if that's a role account or disposable email, and whether the domain has valid SPF and DMARC records set up?”
B2B outreach pre-validation
“I'm about to cold-email contact@bigclient.com for a sales pitch — can you check if that email has valid MX and DMARC records and isn't flagged as a role address before I send?”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single-call, multi-signal email validation that covers syntax, DNS infrastructure (MX/SPF/DMARC), disposable provider detection, and role account flagging simultaneously — especially in agent or automated workflows where per-call micropayment via x402 is acceptable and you need a lightweight, real-time check without managing a separate email verification SaaS subscription.
Side effects
- Invalid or malformed email address returns a syntax error or validation failure
- Domain with no MX records returns undeliverable status
- DNS lookup timeouts may cause transient failures for slow-resolving domains
- Disposable provider list may not be exhaustive, leading to some burner emails passing
- Role account detection relies on prefix matching and may miss uncommon role prefixes
- Payment required (HTTP 402) if x402 micropayment header is missing or 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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