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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 workflows.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, and DMARC record presence.
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://workflows.agentdiet.dev/v1/email-check)
Output
Returns a structured object covering: email syntax validity, whether the provider is a known disposable or burner service, whether the address is a role account (e.g. admin@, noreply@), and live DNS lookup results for MX records (mail server presence), SPF record validity, and DMARC policy record existence — giving an overall deliverability assessment for the address.
Example use cases
Screening signup form submissions
“Before we onboard this new user, can you verify that their email address sarah.jones@tempmail.org isn't a throwaway or disposable address and that it actually has working mail servers behind it?”
Pre-campaign lead list hygiene
“I have a B2B lead with the email contact@horizon-ventures.com — can you check if it's deliverable, whether it's a role account, and if the domain has MX, SPF, and DMARC configured properly before I add them to my outreach sequence?”
CRM data quality audit
“We just imported a list of prospects and I want to spot-check one: does billing@globaltech.net look like a valid, non-disposable email with proper DNS mail records, or should we flag it for review?”
Technical details
Endpoint
GEThttps://workflows.agentdiet.dev/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email deliverability check that goes beyond simple regex syntax validation — specifically when you need live DNS MX record verification combined with SPF/DMARC policy checks and disposable/role-account detection in a single call. Prefer it over generic email syntax validators when the cost of bounced email or fake signups is high, such as in B2B lead enrichment, CRM hygiene, or pre-send campaign validation workflows.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS timeout or lookup failure may result in inconclusive MX/SPF/DMARC results
- Very new or obscure domains may lack SPF/DMARC records, flagged as absent rather than invalid
- Payment required (HTTP 402) if x402 micropayment is not fulfilled
- Rate limiting if too many requests are made without proper payment flow
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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