Sends an array of products in one request.

Inserts only

Every product in the array is created as a new product, even if a matching one already exists. It never updates. To change an existing product, use Update a product, one product at a time.

It isn't all-or-nothing: you get a result per product, keyed by array position, in the same shape as Create sales in bulk. It fires the product_bulk_create hook, not product_create for each product.