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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 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://agentdiet.dev/v1/mx-check)
Output
Returns a structured object indicating email syntax validity, whether the domain belongs to a known disposable/burner provider, whether it is a role account (e.g. info@, noreply@), and the live DNS lookup results for MX, SPF, and DMARC records — effectively giving a full deliverability and trust profile for the email address.
Example use cases
Screen signups for throwaway emails
“Before I add this new user to my mailing list, can you check if the email they gave me — signup123@mailinator.com — is a disposable or burner address, and whether it would even be deliverable?”
Verify lead email before outreach
“I'm about to send a cold outreach email to cto@acmecorp.io — can you verify it's a real deliverable address with valid MX records and that the domain has SPF and DMARC configured so my message won't bounce or get flagged?”
Audit role accounts in CRM
“Can you check if the email support@bigbrand.com is a role account rather than a real person, and confirm whether the domain actually has working mail infrastructure set up?”
Technical details
Endpoint
GEThttps://agentdiet.dev/v1/mx-check?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 MX/SPF/DMARC verification — especially in agentic workflows where you want to screen leads, new user registrations, or outreach targets without stitching together multiple tools. Prefer it over basic regex validators when deliverability and fraud risk matter.
Side effects
- Missing or malformed email parameter returns an error
- DNS lookup timeout if the domain's nameservers are slow or unresponsive
- Unknown or newly registered domain may return no MX/SPF/DMARC records even if legitimate
- Disposable provider lists may not cover every burner service, leading to false negatives
- Network-level failures could cause intermittent lookup failures
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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