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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 2026-10-21).
Validates an email address for syntax correctness, disposable/burner provider status, role-account detection, and live DNS MX, SPF, and DMARC record checks.
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-deliverability-verifier)
Output
Returns a structured object indicating: email syntax validity, whether the domain is a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), live DNS MX record presence and details, SPF record existence and content, and DMARC policy record — giving a holistic deliverability assessment.
Example use cases
Screen signups for fake emails
“Someone just signed up with the email temp-user@mailnull.com — can you check if it's a disposable or burner address and whether it has real MX records before we let them into the platform?”
Pre-send deliverability audit
“Before we send our newsletter campaign to support@acmecorp.io, can you verify that the domain has valid MX and DMARC records and that the email is actually deliverable?”
CRM lead quality check
“We just imported a list of leads and I want to check whether sales@newprospect.biz is a legitimate business email — please verify its syntax, MX records, SPF, DMARC, and whether it's a role account.”
Technical details
Endpoint
GEThttps://serp-extract.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email health check that combines syntax validation, live DNS MX/SPF/DMARC lookups, and disposable/role-account detection — especially in agent workflows requiring fraud screening, CRM enrichment, or pre-send deliverability audits. Prefer it over lightweight regex-only validators when real DNS verification matters.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts may cause MX/SPF/DMARC checks to fail or return partial results
- Newly registered domains may lack MX/SPF/DMARC records causing false negatives
- Disposable provider database may not include all known throwaway services
- Payment failure (HTTP 402) if USDC balance is insufficient for the $0.005 per-call fee
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| emailrequired | string | Email address to validate for syntax, MX deliverability, and disposable risk |
| limit | integer | Maximum number of items to return per page (1-100) |
| cursor | string | Opaque pagination cursor for fetching the next page |
Output
Schema · Response
{
"type": "object"
}Reviews
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