In implementing an Open Commerce API call, which modification allows requests to execute successfully?

In the context of making successful Open Commerce API calls, altering the methods value to include [get, post] is significant because it defines the operations that can be performed on the API endpoint. In a typical API interaction, GET requests are used to retrieve data, while POST requests are used to send data or create new resources.

By explicitly enabling both GET and POST methods, the API call allows for the retrieval of information about the current state of resources (like baskets) as well as the capability to modify those resources (e.g., adding items to a basket). This versatility is essential for the functionality of storefronts that require interaction with items in a basket, as they need both read access and write capability to perform all necessary actions within the user session.

The other options focus on aspects like resource identifiers and attribute specifications, which, while important, do not directly address the critical requirement for enabling the necessary HTTP methods that facilitate communication with the API for various operations. Ensuring that the correct methods are specified is foundational for successful API interaction.