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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 detection, role account flags, and live DNS MX/SPF/DMARC record checks to assess deliverability.
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/mx-deliverability-verifier)
Output
Returns a structured JSON object indicating email syntax validity, whether the domain uses a known disposable/burner email provider, whether the address is a role account (e.g. admin@, support@), and the live DNS lookup results for MX, SPF, and DMARC records — giving an overall deliverability assessment.
Example use cases
Pre-send bounce prevention for outreach
“Before we send our cold outreach campaign, check whether contact@prospectcorp.io is a real deliverable address — does it have working MX records and is it flagged as disposable or a role account?”
Signup fraud detection for new users
“A user just signed up with the email temp123@mailinator.com — can you check if that's a disposable or burner email address so I can decide whether to block the registration?”
CRM data quality audit
“I need to verify noreply@bigcompany.com before adding it to our CRM — is it a role account, does the domain have valid SPF and DMARC records, and is it actually deliverable?”
Technical details
Endpoint
GEThttps://defi-yield.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, live email deliverability check that combines syntax validation, disposable-provider detection, role-account flagging, and real DNS record inspection (MX/SPF/DMARC) in a single call. Prefer it over basic regex-only validators when you need live DNS verification, or over domain-only tools when you need per-address disposable and role detection.
Side effects
- Missing or malformed email parameter returns a 400 validation error
- DNS lookup timeout if the domain's nameservers are unresponsive
- Unknown or very new domains may lack MX/SPF/DMARC records, flagged as undeliverable
- Payment not authorized results in HTTP 402 response requiring x402 USDC payment
- Rate limiting or service unavailability returns 5xx errors
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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