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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 prompt-guard.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 domain status, role account detection, and live DNS MX, SPF, and DMARC record verification.
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://prompt-guard.agentdiet.dev/v1/email-check)
Output
Returns a structured object indicating email syntax validity, whether the domain uses a known disposable/burner provider, whether it is a role-based address (e.g. info@, admin@), and live DNS lookup results for MX, SPF, and DMARC records — helping determine overall deliverability and trustworthiness of the address.
Example use cases
Pre-send email list hygiene
“Before I send this marketing campaign, check if the signup email address mike.jones@tempmail.xyz is legitimate — I need to know if it's a burner address and whether the domain actually has MX records set up.”
Lead enrichment before CRM entry
“I'm about to add contact@startupxyz.com to our CRM — can you verify it's a real deliverable address, not a role or disposable account, and that their domain has proper SPF and DMARC records?”
Fraud detection during user onboarding
“A new user just signed up with the email noreply@guerrillamail.com — can you check if this is a disposable or role account and whether the domain has valid MX records before I let them into the platform?”
Technical details
Endpoint
GEThttps://prompt-guard.agentdiet.dev/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email check covering syntax, disposable provider detection, role account identification, and live DNS verification of MX, SPF, and DMARC records — particularly for B2B lead validation, fraud prevention during user signup, or pre-send list hygiene in marketing workflows. Prefer it over simple syntax-only validators when DNS deliverability and email security posture (SPF/DMARC) matter to your use case.
Side effects
- Missing or empty email parameter returns a validation error
- Malformed email string may return syntax-invalid without DNS checks
- DNS lookup timeout for obscure or slow-responding domains may produce incomplete MX/SPF/DMARC results
- Non-existent TLD or domain returns no MX records found
- Payment not fulfilled (HTTP 402) blocks response if x402 payment not completed
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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