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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 defi-yield.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://defi-yield.agentdiet.dev/v1/email-check)
Output
Returns a structured object indicating whether the email passes syntax validation, whether the domain has live MX records (deliverability), whether the address belongs to a known disposable or burner email provider, whether it is a role-based account (e.g. admin@, info@), and whether the domain has SPF and DMARC DNS records configured.
Example use cases
Filter fake sign-ups at registration
“Before I add this user to my database, check if the email they provided — trashmail123@mailinator.com — is a disposable burner address or a real deliverable inbox with working MX records.”
Pre-send CRM lead validation
“I have a sales lead with email contact@acme-corp.io — can you verify it's deliverable, not a role address, and that the domain has SPF and DMARC configured before we reach out?”
Detect fraudulent email in onboarding flow
“A new user signed up with noreply@tempmail.org — can you tell me if that's a role account or disposable email, and whether the domain actually has MX records pointing somewhere real?”
Technical details
Endpoint
GEThttps://defi-yield.agentdiet.dev/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single API call that combines email syntax checking, live DNS MX/SPF/DMARC verification, disposable provider detection, and role account flagging — especially useful in B2B lead enrichment, user registration flows, or pre-campaign list hygiene where knowing both the address format and the domain's mail infrastructure matters. Prefer it over simple regex validators when live DNS lookups are required, and over full SMTP probing tools when you want a fast, non-intrusive check.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts for domains with slow or unresponsive nameservers may produce incomplete MX/SPF/DMARC results
- Newly registered domains not yet propagated in DNS may incorrectly appear to lack MX records
- Disposable provider lists may not cover brand-new throwaway services
- Role account detection based on local-part heuristics may miss unusual role addresses
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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