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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.
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://mcp-security.agentdiet.dev/v1/email-validator)
Output
Returns a structured JSON object indicating whether the email is syntactically valid, whether the domain has live MX records (confirming mail can be delivered), whether SPF and DMARC DNS records exist, whether the provider is a known disposable/burner service, and whether the address is a role account (e.g. info@, support@, noreply@).
Example use cases
Screen sign-up emails for fraud
“Before we create an account for this new user, can you verify that their email address — submissions@freeburner.io — is legitimate, not a throwaway address, and that the domain actually has working mail servers configured?”
Pre-send deliverability check for cold outreach
“I'm about to send outreach to contact@acmecorp.com — can you confirm the email is syntactically valid, the domain has MX records, and that it's not a role account or disposable address that would tank my sender reputation?”
B2B lead list hygiene
“We just scraped a list of leads and I need to check one: ceo@somestartup.net — can you verify it's deliverable, not a catch-all or role address, and that the domain has SPF and DMARC set up properly?”
Technical details
Endpoint
POSThttps://mcp-security.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 need live DNS MX/SPF/DMARC lookups combined with disposable provider detection and role account screening in a single call. Ideal for B2B lead enrichment pipelines, sign-up fraud prevention, and pre-send deliverability checks where multiple validation signals are needed simultaneously.
Side effects
- Invalid or missing email field returns a 400-level error
- DNS lookup timeouts may cause MX/SPF/DMARC checks to fail or return inconclusive results
- Payment failure via x402 returns 402 Payment Required
- Unknown or very new domains may have incomplete DNS data
- Catch-all domains may falsely appear deliverable even if the specific mailbox does not exist
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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