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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/spf-dmarc-auditor)
Output
Returns a structured object containing: email syntax validity flag, disposable/burner provider detection, role account flag (e.g. admin@, support@), live MX record lookup results, SPF record presence and content, DMARC record presence and policy, and an overall deliverability assessment.
Example use cases
Pre-send outreach email validation
“Before I send this cold outreach campaign, check if sarah.jones@prospectco.com is actually deliverable — does the domain have working MX records, and is it a real business address rather than a throwaway or role account?”
User registration fraud prevention
“A new user just signed up with the email temp-user123@mailnull.com — can you verify if this is a disposable or burner email address and whether it would actually receive mail?”
Email domain DNS health audit
“Audit the email noreply@startupxyz.io for me — I want to know if the domain has SPF and DMARC records properly configured, and whether MX is set up correctly for deliverability.”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/spf-dmarc-auditor?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email health check that combines syntax validation, live DNS MX/SPF/DMARC lookups, and disposable provider detection — especially useful for B2B lead validation, outreach list hygiene, or fraud prevention during user registration. Prefer this over simple regex validators when you need live DNS confirmation of deliverability.
Side effects
- Invalid or malformed email string returns syntax error
- Domain does not exist — MX lookup returns NXDOMAIN
- DNS timeout or lookup failure for SPF/DMARC records
- Missing required 'email' query parameter returns 400 error
- Payment required (HTTP 402) if x402 USDC payment header is absent or 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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