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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 domain-osint.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 health.
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://domain-osint.agentdiet.dev/v1/email-check)
Output
Returns a structured object indicating whether the email address is syntactically valid, whether the domain is associated with a known disposable/burner provider, whether it is a role-based address (e.g. admin@, info@), and live DNS lookup results for MX records (confirming mail servers exist), SPF records (sender policy), and DMARC records (anti-spoofing policy).
Example use cases
Screening signups for throwaway emails
“Before I add this user to our database, check if the email they submitted — tempuser123@mailnator.com — is a disposable or burner address with real DNS records, or just a throwaway.”
Lead list deliverability audit
“I have a prospect email, cto@bigcorp.io — can you verify it's syntactically valid, not a role account, and that the domain has proper MX and DMARC records so I know it's safe to cold outreach?”
Email infrastructure health check
“Can you tell me if the domain behind noreply@startup.dev has SPF and DMARC set up correctly, and whether the MX records look healthy for actual mail delivery?”
Technical details
Endpoint
GEThttps://domain-osint.agentdiet.dev/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, live email validation that goes beyond syntax checking — specifically when you need real-time DNS MX, SPF, and DMARC verification combined with disposable provider and role account detection in a single API call. It is ideal for lead enrichment pipelines, user registration screening, and email deliverability auditing where you need actionable signals rather than just format validation.
Side effects
- Missing or malformed email parameter returns a 400-level error
- DNS lookup timeouts for domains with slow or unresponsive nameservers may cause delays or incomplete results
- Disposable provider detection depends on a maintained blocklist and may miss newly created throwaway services
- Payment failure or missing x402 credentials returns a 402 Payment Required response
- Very new domains may have no MX/SPF/DMARC records yet, returning false negatives on deliverability
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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