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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 domain-osint.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/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://domain-osint.agentdiet.dev/v1/email-validator)
Output
Returns a structured JSON object indicating whether the email address passes syntax checks, whether the domain has valid live MX records, the presence and validity of SPF and DMARC DNS records, whether the provider is a known disposable/burner email service, and whether the address is a role-based account (e.g. info@, support@).
Example use cases
Signup fraud prevention for SaaS
“Before I activate this new user account, check if the email they signed up with — freeuser99@mailinator.com — is a disposable or burner address, and whether it even has real MX records behind it.”
Pre-send lead list scrubbing
“I have a lead I want to email: ceo@acmecorp.io — can you verify that the email is syntactically valid, the domain has live MX records, and SPF/DMARC are configured so my outreach won't bounce or land in spam?”
Detecting role-based contact emails
“We scraped contact@bigclient.com from a website — can you tell me if that's a role account rather than a real person's inbox, and whether the domain's DNS is properly set up for email delivery?”
Technical details
Endpoint
POSThttps://domain-osint.agentdiet.dev/v1/email-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email health check that combines syntax validation, live DNS MX/SPF/DMARC lookups, disposable provider detection, and role account flagging — especially in fraud prevention, lead qualification, or pre-send list hygiene workflows where bounce risk and fake signups are a concern. Prefer it over simple regex-only validators when actual deliverability and domain security posture matter.
Side effects
- Invalid or missing email input returns a 400 error with validation message
- DNS lookup timeout for MX/SPF/DMARC if the domain's nameservers are slow or unresponsive
- Domain does not exist resulting in no MX records found
- Payment required (402) if x402 USDC micropayment header is not provided
- Ambiguous results for newly registered domains with incomplete DNS propagation
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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