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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 prompt-guard.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/DMARC record lookups to assess deliverability.
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://prompt-guard.agentdiet.dev/v1/disposable-email)
Output
Returns a structured object indicating whether the email passed syntax validation, whether the domain is a known disposable/burner provider, whether it is a role-based account (e.g. admin@, noreply@), and the live DNS lookup results for MX, SPF, and DMARC records for the email's domain.
Example use cases
Screen sign-up for fake emails
“A user just registered with the email free-trial@guerrillamail.com — can you check if it's a disposable or burner address, and whether the domain has legit MX records before I activate their account?”
Pre-send deliverability audit
“Before I send my newsletter campaign, can you verify that contact@acmecorp.io is actually deliverable — check if the domain has MX records set up and whether SPF and DMARC are configured properly?”
Detect role account in lead list
“I have a sales lead who gave the email address info@bigcompany.com — can you tell me if that's a role-based address, whether it's disposable, and if the domain's mail DNS records look healthy?”
Technical details
Endpoint
GEThttps://prompt-guard.agentdiet.dev/v1/disposable-email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email hygiene check combining syntax validation, disposable provider detection, role account identification, and live DNS MX/SPF/DMARC record verification in a single call. It is particularly useful for sign-up fraud prevention, sales lead qualification, and pre-campaign deliverability audits. Prefer it over simple regex validators when you need live DNS truth, and over domain-only tools when per-address disposable/role detection is required.
Side effects
- Missing or empty email parameter returns an error
- Malformed email string may return syntax invalid without DNS checks
- Temporary DNS lookup failures may result in inconclusive MX/SPF/DMARC results
- Rate limiting or payment failure (HTTP 402) if per-call USDC payment is not provided
- Unknown or newly registered domains may lack SPF/DMARC records, returning absent status rather than an error
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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