The choice between using HTTPS GET or POST for a data sync API between NetSuite and portal storage depends on the specific requirements and use case of the application.
GET requests should be used for retrieving data from the server(NetSuite records), and they can be cached and bookmarked. However, they have limitations on the amount of data that can be sent in the request, and the data is visible in the URL, which may not be desirable for sensitive information.
POST requests, on the other hand, are used for sending data to the server and can handle larger amounts of data. The data is sent in the body of the request, making it more secure than GET requests. POST requests are also not cached or bookmarked, which may be a consideration depending on the specific requirements of the application.
In the context of a data sync API between NetSuite and portal storage, POST requests may be more suitable for sending large amounts of data securely to the server. However, it is important to consider the specific requirements and security considerations of the application when making this decision.