Amazon Selling Partner API - Upload Product Data - amazon

Question

I use the Selling Partner API for PHP from jlevers
(https://github.com/jlevers/selling-partner-api)
Connection works after a lot of reading posts. I can get orders, order items and so on.
Now I want to try to upload product data to amazon.
Is it possible to upload the product in json format ? Or is it normal that we still upload the product data in xml format? I cant find a PHP example with json format.
I found this example:
https://spapi.cyou/en/use-case/feeds-api-use-case-guide_2021-06-30.html#xml-feeds
My second question is, if I can get the categories from amazon with a Api call or is it still just an XSD file?

Answer 1

A way i did this in XML format in java is like this:
StringBuilder stringBuilder = new StringBuilder(); //everything is hardcoded except sku & quantity
stringBuilder.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>").append("\n");
stringBuilder.append("<AmazonEnvelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:noNamespaceSchemaLocation=\"amzn-envelope.xsd\">").append("\n");
stringBuilder.append("<Header>").append("\n");
stringBuilder.append("<DocumentVersion>1.01</DocumentVersion>").append("\n");
stringBuilder.append("<MerchantIdentifier>A24AHHJKC9JJQL</MerchantIdentifier>").append("\n");
stringBuilder.append("</Header>").append("\n");
stringBuilder.append("<MessageType>Inventory</MessageType>").append("\n");
stringBuilder.append("<Message>").append("\n");
stringBuilder.append("<MessageID>1</MessageID>").append("\n");
stringBuilder.append("<Inventory>").append("\n");
stringBuilder.append("<SKU>").append(sku).append("</SKU>").append("\n"); //------>> SKU
stringBuilder.append("<Quantity>").append(quantity).append("</Quantity>").append("\n"); //------>> Quantity
stringBuilder.append("</Inventory>").append("\n");
stringBuilder.append("</Message>").append("\n");
stringBuilder.append("</AmazonEnvelope>");
Only SKU and Quantity are variables and have to be inputted by the program