This is the module for Magento 2, it includes the shipping rates service and must be installed in the vendor store.
You have to download the 4 directories and put them inside a directory called "NoventaYNueveMinutos". The next you have to do is place the directory in the /app/code/ route of your Magento 2 installation. The next is to run "php bin/magento setup:upgrade"
Now it is available in the shipping methods section and should work after you complete the forms.
Before installing the plugin you must have an active register in: https://magento.99minutos.app/register