Optionalcustomer_Optionalexpires_300–86,400. Defaults to 1,800 (30 min).
Optionalidempotency_Replaying the same key returns the original invoice instead of creating a duplicate.
OptionalmemoOptionalmetadataOptionalsettlementOverride the dashboard default settlement target for this invoice.
Required. Integer USD cents, 100–10,000,000.