Fee Configuration — New payment_method Field

New payment_method field on fee endpoints

All fee upsert endpoints now accept an optional payment_method field, allowing fees to be scoped to a specific fiat payment rail (ACH or WIRE).

When payment_method is set, the fee only applies to transactions that use the specified payment method. Omit the field or pass null to apply the fee regardless of payment method.

Affected endpoints

Accepted values

ACH, WIRE

Example

PATCH /merchant/fees
{
  "fee": 0.005,
  "input_currency": "USD",
  "direction": "onramp",
  "fee_op_type": "add",
  "payment_method": "ACH"
}