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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 x402-audit.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 status, role account detection, and live DNS MX, SPF, and DMARC record health.
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://x402-audit.agentdiet.dev/v1/email)
Output
Returns a structured object indicating whether the email passes syntax checks, whether the domain has live MX records confirming deliverability, whether SPF and DMARC DNS records are present and valid, whether the provider is flagged as disposable or a burner service, and whether the address is a role account (e.g. admin@, info@, noreply@).
Example use cases
Scrub leads before cold outreach
“Before I send my outreach campaign, check whether contact@techstartup.io is a valid, deliverable email — flag it if the domain has no MX records, if SPF or DMARC are missing, or if it looks like a burner or role address.”
Block disposable signups at registration
“A user just signed up with guerrillamail123@guerrillamail.com — can you verify if this is a disposable or burner email so I can decide whether to block the registration?”
Audit CRM email list quality
“I need to validate support@bigcorp.net — check if it has working MX records and proper DMARC and SPF setup, and let me know if it's a role account that might not be monitored by a real person.”
Technical details
Endpoint
GEThttps://x402-audit.agentdiet.dev/v1/email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple syntax checks — specifically when you need live DNS MX record verification plus SPF/DMARC policy inspection and disposable/role account detection in a single call. It is well-suited for B2B lead enrichment pipelines, anti-fraud signup flows, and pre-send deliverability audits where knowing the full DNS health of an email domain matters.
Side effects
- Missing or malformed email parameter returns a 400-level error
- DNS lookup timeouts may affect MX/SPF/DMARC results for slow nameservers
- Newly registered domains may lack DNS propagation, causing false negatives
- Payment failure via x402 returns HTTP 402, blocking the request
- Some disposable providers may not be in the known blocklist, causing false negatives
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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