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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 2026-10-23).
Validates an email address for syntax correctness, disposable/burner provider status, role-account flags, 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-deliverability-verifier)
Output
Returns a structured object indicating email syntax validity, whether the domain uses a known disposable or burner provider, whether the address appears to be a role account, and live DNS lookup results including MX record presence, SPF record configuration, and DMARC policy record — enabling a full deliverability risk assessment for the queried address.
Example use cases
Screen signups for throwaway emails
“Before we activate this new user account, check if the email signup@tempmail.io is a disposable or burner address — and confirm whether the domain actually has MX records so mail can be delivered.”
Pre-send deliverability audit
“I'm about to send a cold outreach email to cto@acmecorp.com — can you verify that the domain has working MX records and proper SPF and DMARC DNS records so my message won't bounce or be flagged as spam?”
Flag role accounts in CRM
“We just imported a lead list and I want to flag any role-based email addresses like info@, support@, or noreply@ — can you check if contact@bigbrand.com is a role account rather than a real person's inbox?”
Technical details
Endpoint
POSThttps://agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single call that combines email syntax validation, disposable-provider detection, role-account flagging, and live DNS MX/SPF/DMARC verification — rather than stitching together separate DNS query tools and blocklist APIs. It is especially well-suited for agent workflows that need to gate user onboarding, qualify leads before outreach, or audit an email list for deliverability risk, and it supports MCP and x402 micropayment natively for autonomous agent usage.
Side effects
- Missing or malformed email address returns a 400 validation error
- DNS lookup timeout if the domain's nameservers are unresponsive
- Unknown or newly registered domains may lack MX/SPF/DMARC records, appearing as undeliverable even if legitimate
- Disposable provider detection may miss newly created throwaway services not yet in the blocklist
- Role account detection relies on heuristic prefix matching and may produce false positives for uncommon prefixes
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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