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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 2026-10-23).
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/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 status — giving a comprehensive deliverability risk assessment.
Example use cases
Lead list email hygiene check
“Before I import this lead list, can you verify that sarah.jones@acmecorp.io is actually deliverable — check the MX records, make sure it's not a throwaway address, and confirm the domain has SPF and DMARC configured?”
New user signup validation
“A user just signed up with the email temp-user123@mailnesia.com — can you tell me if that's a disposable or burner email address and whether it would actually receive mail?”
Cold outreach domain audit
“I'm about to cold-email a prospect at ceo@startupxyz.com — can you check if that domain has working MX records and proper email authentication like SPF and DMARC before I send?”
Technical details
Endpoint
POSThttps://onchain-risk.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single, comprehensive email quality check combining syntax validation, disposable provider detection, role account flagging, and live DNS MX/SPF/DMARC lookup in one call — especially in agentic workflows processing user signups, lead lists, or outreach targets where deliverability and authentication posture matter together.
Side effects
- Malformed or missing email input returns a validation error
- DNS lookup timeout if the queried domain is unreachable or extremely slow
- Disposable provider list may lag behind newly created throwaway domains
- Role account detection based on username prefix heuristics may produce false positives for legitimate addresses
- API payment failure via x402 if USDC balance is insufficient
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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