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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 mcp-security.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 identification, and live DNS MX, SPF, and DMARC record checks.
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://mcp-security.agentdiet.dev/v1/spf-dmarc-auditor)
Output
Returns a structured object indicating email syntax validity, whether the domain uses a known disposable/burner provider, whether the address appears to be a role account (e.g. admin@, noreply@), and the live DNS MX records, SPF record presence/policy, and DMARC record presence/policy for the email's domain.
Example use cases
SaaS signup fraud prevention
“Before we activate this new user account, can you verify that the email they signed up with — freemailer99@mailnull.com — is real and not a disposable or burner address?”
B2B lead list email hygiene
“I have a lead I'm about to cold-email: cto@startupxyz.io — can you check if that address is actually deliverable and whether the domain has MX, SPF, and DMARC records properly configured?”
Deliverability audit before email campaign
“We're about to send a campaign to a list of contacts and I want to verify one of the addresses first — can you do a full deliverability check on newsletter@bigclient.com, including DNS records and disposable/role account flags?”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/spf-dmarc-auditor?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email validation that covers syntax, disposable provider detection, role-account flagging, and live DNS MX/SPF/DMARC record verification. Prefer it over simple regex-based syntax checkers when deliverability and domain security posture both matter, or over standalone MX lookup tools when you also need disposable/role account intelligence in one response.
Side effects
- Invalid or malformed email address provided — returns syntax error
- DNS lookup timeout for the domain's MX/SPF/DMARC records — may return partial results
- Domain has no MX records (undeliverable domain) — reported as non-deliverable
- Payment not completed (HTTP 402) — request blocked until x402 USDC payment is made
- Empty email parameter — returns required field validation error
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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