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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 x402-audit.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://x402-audit.agentdiet.dev/v1/email-check)
Output
Returns a structured object indicating whether the email address passes syntax validation, whether the domain is flagged as a known disposable/burner provider, whether the address appears to be a role account (e.g. info@, support@), and whether live DNS lookups found valid MX, SPF, and DMARC records for the domain.
Example use cases
Lead list email hygiene screening
“I have a lead from a form signup with the email temp_user@mailinator.com — can you check if it's a legit deliverable address or a throwaway burner account before we add them to our CRM?”
B2B outreach deliverability check
“Before I send a cold outreach campaign, can you verify that sarah.johnson@acmecorp.com is actually deliverable — check the MX records and confirm the domain has SPF and DMARC set up?”
Signup fraud prevention
“A new user just registered with the email noreply@bigcompany.com — can you check if that's a role account or if the domain even accepts mail, so we know whether to approve the account?”
Technical details
Endpoint
GEThttps://x402-audit.agentdiet.dev/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, multi-signal email validation in a single call — combining syntax checking, live DNS MX/SPF/DMARC lookups, disposable provider detection, and role account flagging. Prefer it over simple regex validators when actual deliverability matters, or over general DNS tools when you specifically need all email-related checks bundled. Ideal for agent workflows doing lead qualification, fraud prevention, or pre-send campaign hygiene.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS lookup timeout for MX/SPF/DMARC records if the domain's nameservers are slow or unresponsive
- False negatives on disposable providers not yet in the blocklist database
- Payment failure (HTTP 402) if x402 USDC payment is not processed correctly
- Domain with no MX records may return deliverability failure even if the email syntax is valid
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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