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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 mesh.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-23).
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://mesh.agentdiet.dev/v1/mx-check)
Output
Returns a structured object indicating: email syntax validity, whether the domain belongs to a known disposable/burner provider, whether the local part is a role-based account (e.g. support, admin, noreply), and live DNS lookup results for MX records (with hostnames/priorities), SPF record presence and content, and DMARC record presence and policy — giving a holistic deliverability and trust assessment for the address.
Example use cases
Lead form email gating
“Before we add this signup to our CRM, check if the email 'freestuff123@mailinator.com' is a real deliverable address or a throwaway burner — I also want to know if it's a role account.”
Pre-send campaign email hygiene
“I have a new subscriber email 'newsletter@corporateclient.io' — can you verify it has working MX records and that the domain has SPF and DMARC set up before we send them our onboarding sequence?”
SaaS signup fraud detection
“A user just registered with 'admin@tempmail.org' — is that a disposable provider or a role account we should flag? Also check if the domain even has MX records set up.”
Technical details
Endpoint
POSThttps://mesh.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email health check covering syntax, DNS deliverability, disposable provider detection, role account identification, and SPF/DMARC policy verification — especially in B2B lead enrichment, SaaS signup flows, or pre-campaign list hygiene where false positives from burner addresses are costly. Prefer it over simple regex-only validators when live DNS confirmation is required, and over domain-only DNS tools when you need email-address-level analysis including local-part role detection.
Side effects
- Invalid or malformed email string causes syntax validation failure with no DNS lookup performed
- Domain has no MX records — returns valid syntax but undeliverable status
- DNS timeout or resolution failure for the domain results in inconclusive MX/SPF/DMARC fields
- Payment not attached or insufficient — HTTP 402 response blocking the call
- Rate limiting or network errors from the upstream DNS resolver causing intermittent failures
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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