Which API can be used to retrieve payment information for an order in Salesforce Commerce Cloud?

The Order API is the appropriate choice for retrieving payment information related to an order in Salesforce Commerce Cloud. This API is specifically designed to handle various aspects of an order, including fetching details about the order status, items, customer information, and payment methods utilized during the transaction.

When working with the Order API, developers can access comprehensive order details, including the payment information, which is crucial for operational tasks like displaying payment data to customers or processing refunds. By using this API, developers ensure that they are interacting with all pertinent order-related data in a unified way.

While other APIs like the Payment API, Checkout API, and Customer API serve important functions within the platform, they are not optimized specifically for retrieving order-level details. The Payment API, for instance, focuses on managing payment transactions and definitions but does not provide a simple way to gather payment information associated with specific orders. The Checkout API is used during the checkout process but does not directly retrieve existing order payment details, and the Customer API is centered around customer data, not order payment information.