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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-compiler.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 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-compiler.agentdiet.dev/v1/email-validator)
Output
Returns a structured assessment of the email address covering: syntax validity, whether the domain uses a disposable/burner email provider, whether it is a role-based account (e.g. info@, admin@), live DNS MX record lookup results, SPF record presence and content, and DMARC record presence and policy — giving an overall picture of whether the email is likely deliverable and trustworthy.
Example use cases
Screening sign-up emails for fraud
“Before we activate this new user account, can you verify that the email they signed up with — freestuff99@mailinator.com — is a legitimate address and not a throwaway or burner account?”
Pre-campaign email list hygiene
“I'm about to send a marketing email to contact@acmecorp.io — can you check if that address has working MX records and a valid DMARC policy so I know it'll actually be deliverable?”
B2B lead qualification check
“We got a lead from someone using sales@globalpartners.biz — can you validate that email's DNS setup, check for SPF and DMARC records, and tell me if it looks like a real business address or a role account?”
Technical details
Endpoint
GEThttps://mcp-compiler.agentdiet.dev/v1/email-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email validation that combines syntax checking, disposable provider detection, role account flagging, AND live DNS record verification (MX, SPF, DMARC) in one response. Prefer it over basic regex validators when deliverability matters, or over simple MX checkers when you also need fraud/burner detection. Ideal for lead enrichment pipelines, user onboarding flows, and pre-send campaign hygiene where false positives are costly.
Side effects
- Missing or invalid 'email' query parameter returns a validation error
- Domain does not exist in DNS — MX lookup fails with NXDOMAIN
- Temporary DNS timeouts may cause inconclusive MX/SPF/DMARC results
- Payment not fulfilled (HTTP 402) if x402 micropayment is not provided
- Rate limiting if too many requests are sent in a short window
- Ambiguous results for newly registered domains with incomplete DNS setup
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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