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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 email-verify.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 detection, role account identification, and live DNS checks for MX, SPF, and DMARC records.
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://email-verify.agentdiet.dev/v1/email-check)
Output
Returns a structured object indicating whether the email address passes syntax validation, whether the domain is associated with a known disposable or burner provider, whether it is a role-based account (e.g. admin@, info@), and the results of live DNS lookups for MX, SPF, and DMARC records — enabling an agent to determine overall deliverability and trust risk for the address.
Example use cases
Lead list email hygiene check
“Before we import these leads into our CRM, can you verify that jane.smith@acmecorp.io is a real, deliverable address — check its MX records and flag it if it's a burner or role account?”
Signup fraud detection
“A user just registered with temp-mail123@mailnull.com — can you check if that's a disposable or throwaway email provider so we can decide whether to block the signup?”
Cold outreach domain health audit
“We're about to send a cold email campaign to prospects at techstartup.ai — can you verify that marketing@techstartup.ai has valid MX records and that the domain has SPF and DMARC properly set up?”
Technical details
Endpoint
GEThttps://email-verify.agentdiet.dev/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple syntax checking — specifically when you need live DNS MX/SPF/DMARC verification combined with disposable provider and role account detection in a single call. Prefer this over generic email regex checkers when deliverability assurance and fraud/burner detection are required, such as during user onboarding, lead enrichment, or pre-campaign list hygiene.
Side effects
- Invalid or malformed email input returns a syntax error or validation failure
- DNS lookup timeout for domains with slow or unresponsive nameservers
- Non-existent domain returns no MX records found
- Payment required (HTTP 402) if x402 micropayment is not included
- Rate limiting if too many requests are sent in quick succession
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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