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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 serp-extract.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-23).
Validates an email address for syntax correctness, disposable/burner status, role-account detection, and live DNS MX/SPF/DMARC record integrity.
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://serp-extract.agentdiet.dev/v1/mx-check)
Output
Returns a structured object indicating whether the email passes syntax validation, whether the domain has live MX records capable of receiving mail, whether SPF and DMARC DNS records are present and correctly configured, whether the address belongs to a known disposable/burner email provider, and whether it is a role-based account (e.g. info@, noreply@).
Example use cases
Pre-send lead outreach hygiene
“Before I fire off my cold email campaign, check if sarah.johnson@techcorp.io is a real deliverable address — does the domain have MX records set up, and is it flagged as a disposable or role account?”
New user signup fraud check
“A user just signed up with the email noreply@mailinator.com — can you verify whether it's a burner or disposable address and whether the domain actually has MX records that accept mail?”
CRM contact email audit
“I need to audit this contact's email: ceo@startupexample.com — tell me if it passes syntax checks, whether the domain has SPF and DMARC configured, and if there's any deliverability risk.”
Technical details
Endpoint
POSThttps://serp-extract.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, live multi-signal email check — combining syntax, DNS MX/SPF/DMARC lookup, and disposable/role-account detection in a single call — rather than a static regex or basic format check. Ideal for lead enrichment pipelines, signup fraud prevention, or cold outreach hygiene where deliverability confidence is critical. Prefer this over simpler validators when DNS record verification and disposable-domain detection are both required together.
Side effects
- Invalid or malformed email string returns a syntax error response
- Domain with no DNS records returns MX lookup failure
- Timeout on DNS resolution for slow or unresponsive nameservers
- Unknown or newly registered disposable domain not yet in blocklists may pass incorrectly
- Rate limiting or payment failure (HTTP 402) if USDC balance is 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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