Thanks for sharing this. I’ve done something similar before, and the cleanest workflow was to read the spreadsheet (CSV/Excel) with a simple script, loop through each row, and call the Authorize.Net createCustomerProfile endpoint per record. If you prefer not to write everything from scratch, their PHP and Python SDKs already handle most of the request formatting, so you mainly focus on mapping columns to fields.
Just make sure you add basic error handling and logging so you can retry any profiles that fail during the batch run.
