Verify a postal address for deliverability, paid in USDC. POST a JSON body { "address": { "line1", "city", "state", "zip", "country?" } } with an X-PAYMENT header to get CASS-standardized deliverability (US) or international verification (2-letter non-US country code). Flat price per call; the same request without a payment header returns the 402 challenge.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.02 USDC | 0x4ecc...007F |