Parameter	Type	Description
accessId*	String	Unique identifier that ensures that the integrator has the authorization to make requests on behalf of the customer. (Specifically, a customer's merchant account)

Parameter	Type	Description
token*	Object/Hash	Object containing authentication parameters - most crucially the requestId which is required with every call. For more information, see the Token Object.
totalAmount*	Decimal	The total amount of the payment being processed, including tax if applicable.
tax	Decimal	Portion of totalAmount that is tax.
description	String	Payment Description. Header level text that will accompany payment.
orderId	String	Values sent here will be stored in the Order Number field within ClientPay.
payerOrPaymentMethodId	String	Required if no "creditCard" object is provided. If a payment method ID is passed in, then that payment method will be used to process the payment. If a payer ID is passed in, the primary payment method for that payer will be used.
creditCard	Object/Hash	Required if no payerOrPaymenMethodId is provided. For more details, see the credit card object.
billingInformation	Object/Hash	Object containing billing address fields that will be prepopulated on the resulting payment page. See the billing information object for more details.