We have thousands of products, and it's impossible to manula add all the atrributes for these in a timely manner. We are creating spreadsheets with all the atrributes and would like to be able to bulk import these ourselves, and delete them by bulk asn e see fit and not have to as consultancy every time.
There is an import feature for attributes: https://docs.prospect365.com/en/articles/6714681-product-attributes-import
Does this do what you need?