Email address validation (syntax + domain + MX, no SMTP probing): Validates one email address without contacting the mailbox: RFC 5321 syntax, domain exists, MX / null-MX / implicit-MX, MX hosts resolve, mail provider, disposable-domain flag (CC0 list), role account (info@, support@), free provider,
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.01 USDC | 0x0876...1d73 |