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B2A Email Deliverability, MX, SPF & DMARC Verifier
x402
B2A Email Deliverability, MX, SPF & DMARC 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 deliverability by checking MX records, SPF, DMARC configuration, and mailbox existence.
Price / call$0.005
Success—
StatusUnknown
How this service works
15-App Autonomous Business-to-Agent (B2A) API Hub & MCP Suite. Supports Web Distillation, On-Chain Risk, DEX Token Intelligence, B2B Lead Enrichment, Domain OSINT, Email Verification, SEC Filings, GitHub Audits, Prompt Firewall, and native HTTP 402 (x402 Base USDC).
Output
Returns a JSON object with a status field and a data object containing email deliverability verdicts, MX record presence, SPF record details, DMARC policy information, and mailbox existence signals. Also includes an roi_proof field showing compression/efficiency metrics.
Example use cases
Pre-outreach email list scrubbing
“Before I send this cold email campaign, can you validate these addresses — start with ceo@startupxyz.io — check if it's actually deliverable and if the domain has proper MX, SPF, and DMARC records set up?”
CRM lead quality check
“I just got a lead from a form submission with the email contact@globaltrade-partners.com — can you verify it's a real, deliverable address before I add it to our CRM?”
Email infrastructure audit for a prospect
“I'm doing due diligence on Meridian Logistics — can you check if their domain email (info@meridianlogistics.com) has valid MX records and whether they have SPF and DMARC configured correctly?”
Technical details
Endpoint
GEThttps://x402broker.com/v1/email-verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single, fast email verification that checks not just format but actual DNS-level deliverability signals (MX, SPF, DMARC) in one call. Prefer it over generic SMTP-ping tools when you also need domain security posture (SPF/DMARC) alongside deliverability. The x402/USDC micropayment model makes it suitable for per-address pay-as-you-go agent workflows without subscription overhead.
Side effects
- Invalid or malformed email address returns an error status
- Domain with no MX records returns non-deliverable result
- Timeout or DNS lookup failure for obscure domains
- Missing email query parameter returns a 400-level error
- Rate limiting or payment failure (402) if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {},
"status": "ok",
"roi_proof": {
"compression_ratio_pct": 91.4
}
}
}Tags
x402
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