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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, and 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/mx-deliverability-verifier)
Output
Returns a structured object containing: email syntax validity, whether the domain uses a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), live MX record lookup results, SPF record presence and content, and DMARC policy status — giving a comprehensive deliverability and risk assessment for the submitted email address.
Example use cases
Signup fraud screening for SaaS
“Before I activate this new user account, check if the email they signed up with — free2use99@mailinator.com — is a disposable or burner address, and whether it can actually receive mail.”
B2B lead list hygiene
“I've got a list of prospect emails from a trade show; can you verify whether sales@globalwidgets.com has proper MX and SPF records and isn't a role account before we start the outreach campaign?”
Cold email deliverability audit
“We're about to send a cold email sequence to partnerships@techventures.io — can you confirm the domain has MX records and DMARC configured so we know it won't bounce or get flagged?”
Technical details
Endpoint
POSThttps://domain-osint.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single-call, real-time check that combines email syntax validation, disposable/burner detection, role account flagging, and live DNS MX/SPF/DMARC verification in one response — particularly useful for CRM hygiene, signup fraud prevention, or pre-send deliverability audits. Prefer it over simple regex-only validators when live DNS truth is required, and over bulk email verification services when per-address micropayment pricing and agent-native x402 payment are preferred.
Side effects
- Invalid or malformed email input returns a syntax error
- DNS lookup timeout if the domain's nameservers are unresponsive
- Domain does not exist (NXDOMAIN), resulting in no MX/SPF/DMARC records found
- Payment not settled (HTTP 402) if x402 micropayment header is missing or insufficient
- Rate limiting or network error from the upstream DNS resolver
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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