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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 whale-momentum.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://whale-momentum.agentdiet.dev/v1/mx-check)
Output
Returns a structured object indicating whether the email address passes syntax checks, whether the domain uses a known disposable or burner provider, whether it is a role account, and the live DNS lookup results for MX, SPF, and DMARC records — giving an overall deliverability assessment.
Example use cases
Block fake signups at registration
“Before I create an account for the user who just entered signup@mailinator.com, check if it's a disposable burner email or if the domain has real MX records — I want to reject throwaway addresses.”
Qualify leads before CRM import
“I have a lead with the email contact@somestartup.io — can you verify it's deliverable, check that the domain has MX records, and flag it if it looks like a generic role account before I add it to the CRM?”
Pre-flight email campaign validation
“Before I send the newsletter, check that the domain for newsletter@techblog.net actually has MX and DMARC records set up properly so the emails won't bounce or get flagged as spam.”
Technical details
Endpoint
GEThttps://whale-momentum.agentdiet.dev/v1/mx-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email health check combining syntax, disposable-provider detection, role-account flagging, and live DNS record lookups (MX, SPF, DMARC) — particularly in B2B lead qualification, user registration flows, or pre-send campaign validation where deliverability accuracy matters and you want DNS-level confirmation rather than just format checking.
Side effects
- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts for domains with slow or unresponsive nameservers
- False negatives on newly created disposable email providers not yet in the blocklist
- Non-existent domains return no MX records but may not produce an explicit error message
- Rate limiting or payment failure (HTTP 402) if USDC micropayment is not settled
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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