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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 domain 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-verify)
Output
Returns a structured object indicating whether the email passes syntax validation, whether the domain uses a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), and whether live DNS MX, SPF, and DMARC records exist and are properly configured for the domain.
Example use cases
Screen new user signups for fake emails
“Before we provision an account for signup email burner-user@mailnesia.com, check if it's a disposable or burner address and whether it has valid MX records — I don't want fake signups getting through.”
Validate B2B leads before outreach
“I'm about to send a cold outreach campaign — can you verify that contact@prospectcompany.io is a real, deliverable address with MX and SPF set up, and not a role or throwaway account?”
Audit email security posture of a domain
“Check the email security setup for the address ceo@bigenterprise.com — I need to know if their domain has SPF and DMARC records configured and whether MX is properly set up.”
Technical details
Endpoint
GEThttps://workflows.agentdiet.dev/v1/email-verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call check covering email syntax, deliverability (live MX lookup), email security records (SPF/DMARC), and fraud signals (disposable domain, role account) together — rather than running separate DNS lookups or using a basic syntax-only validator. Especially useful for lead enrichment pipelines, signup fraud prevention, and pre-send campaign validation.
Side effects
- Missing or invalid email parameter returns a validation error
- Non-existent domain causes MX/SPF/DMARC lookups to return negative or empty results
- Temporary DNS resolution failures may cause lookup timeouts
- Disposable provider lists may not cover all burner services, leading to false negatives
- Payment not completed (HTTP 402) if x402 payment header is missing or insufficient
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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