Return the per-country method catalog with the exact credential-field schema required for each method. Use this to drive dynamic instrument- creation forms that know which fields to prompt for based on the selected country and method.
API keys are opaque strings prefixed by environment:
ak_live_* — production keys, accepted only on api.antonpayments.com.ak_test_* — sandbox keys, accepted only on api.antonpayments.dev.Include your key in the Authorization header: Bearer ak_test_....
Filter to methods available in a specific country. ISO 3166-1 alpha-2 country code.
^[A-Z]{2}$"US"
Per-country method schemas.