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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 onchain-risk.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://onchain-risk.agentdiet.dev/v1/disposable-email)
Output
Returns a structured object indicating: email syntax validity, whether the domain uses a known disposable/burner provider, whether the address is a role account (e.g. admin@, info@), and live DNS lookup results for MX records (mail server presence), SPF record (sender policy), and DMARC record (domain-based message authentication policy).
Example use cases
Screening sign-up emails for fraud
“Before I create an account for this user, check if the email they gave me — noreply@mailinator.com — is a disposable address or a role account, and whether its domain actually has working mail servers.”
Pre-send deliverability check for sales outreach
“I'm about to send a cold email to cto@startup.io — can you verify it's syntactically correct, not a throwaway provider, and that startup.io has valid MX, SPF, and DMARC records so my message won't bounce?”
Validating email list before marketing campaign
“We're about to launch an email campaign and I need to check whether the address support@bizcorp.net is a role account and whether the domain has proper DMARC and SPF configurations set up.”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/disposable-email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email health check combining syntax validation, disposable/burner provider detection, role account flagging, and live DNS MX/SPF/DMARC verification. It is ideal for agent workflows that need to screen user-submitted emails at sign-up, validate leads before outreach, or audit email deliverability infrastructure — especially when you need all these signals in one call rather than piecing together separate DNS and blocklist checks.
Side effects
- Missing or malformed email parameter returns a 400-level error
- Non-existent domain may return MX/SPF/DMARC as not found rather than an error
- DNS lookup timeouts may cause delayed or incomplete record results
- Some disposable providers may not be in the blocklist if newly created
- Role account detection relies on prefix matching and may miss novel patterns
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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