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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 checks (MX, SPF, DMARC) to confirm 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/email-validator)
Output
Returns a structured object indicating whether the email passes syntax validation, whether the domain is from a known disposable/burner provider, whether the address is a role account (e.g. admin@, noreply@), and the live DNS status of MX, SPF, and DMARC records for the email's domain — giving a comprehensive deliverability verdict.
Example use cases
Screening sign-ups for burner emails
“Before I let this user register, can you verify that their email signup@tempmail.io isn't a disposable or throwaway address, and that it actually has working MX records so we can reach them?”
Pre-send deliverability check for outreach
“I'm about to send a cold email to cto@bigcorp.com — can you confirm the address is syntactically valid, not a role account, and that the domain has proper MX and SPF records so my message won't bounce or get flagged?”
Email hygiene audit for a CRM contact
“Can you run a full deliverability check on marketing@somenewdomain.co — I want to know if the syntax is good, whether it's a role account, and whether the domain has MX, SPF, and DMARC set up correctly?”
Technical details
Endpoint
GEThttps://defi-yield.agentdiet.dev/v1/email-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple regex — specifically when you want live DNS MX/SPF/DMARC checks combined with disposable-provider detection and role-account flagging in a single call. It is ideal for pre-send deliverability checks, onboarding form validation, or CRM hygiene tasks where false positives (accepting bad emails) are costly.
Side effects
- Missing or empty email parameter returns a validation error
- Malformed email string may cause syntax-fail result without DNS lookup
- DNS lookup timeout for obscure or newly registered domains may result in inconclusive MX/SPF/DMARC status
- Rate limiting or payment failure (x402) returns a 402 response requiring payment
- Domain exists but has no MX records — correctly flagged as undeliverable
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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