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x402broker Email Deliverability & DNS Verifier
x402
x402broker Email Deliverability & DNS Verifier is a paid API for AI agents from x402broker.com, paid per call via x402 or MPP, $0.005/call, status unknown (last checked 2026-10-20).
Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX/SPF/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://x402broker.com/v1/email-check)
Output
Returns a structured report for the queried email address including: syntax validity, whether the domain uses a known disposable/burner email provider, whether it is a role account (e.g. admin@, info@), live DNS MX record lookup results, SPF record presence and validity, and DMARC policy record status — giving a comprehensive deliverability and legitimacy assessment.
Example use cases
Signup form disposable email screening
“Before we let this user register, check if the email they entered — signups@guerrillamail.com — is a disposable or burner address that we should block.”
Sales outreach deliverability audit
“I'm about to email a prospect at cfo@acme-corp.io — can you verify that domain has working MX records and proper SPF/DMARC setup so my message won't bounce or land in spam?”
Role account detection for personalization
“Is support@bigcompany.com a role-based email address? I want to know before I send a personalized outreach email to it.”
Technical details
Endpoint
GEThttps://x402broker.com/v1/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple syntax checking — specifically when you need to combine disposable provider detection, role account flagging, and live DNS record verification (MX, SPF, DMARC) in a single call. Ideal for pre-signup screening, outbound sales qualification, and deliverability auditing. Prefer over basic regex validators or single-purpose MX checkers when you need all signals in one response.
Side effects
- Invalid or malformed email address provided — returns syntax error
- DNS lookup timeout or unreachable nameservers — MX/SPF/DMARC fields may be null or flagged as unresolvable
- Domain does not exist — all DNS checks fail with NXDOMAIN
- Missing required email query parameter — returns 400 bad request
- Payment not included or insufficient — returns HTTP 402 payment required
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"
}Tags
x402
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