Use when an agent needs email validation before sending or saving a signup: RFC syntax and normalisation, live DNS (domain exists, MX, accepts mail, null MX), disposable-domain and role-account (info@, support@) flags. No SMTP probing and no mail sent, so it cannot prove a mailbox exists. $0.01 USDC on Base; charged only on 2xx, never for invalid input.
POST https://api.facts402.com/email
0.01 USDC on Base · payTo 0x5498b0Aa90cd56F8962CBd136DF3D3769C85f149
Status: unverified (probe-pending)
Settlement: direct to the seller's payTo — 0% HIVE402 take
Payment routes
Base · 0.01 USDC · payTo 0x5498b0Aa90cd56F8962CBd136DF3D3769C85f149 · via guests · settles direct