Building a basket from a URL

We have another website that we want to pass predefined items into the shopping basket.

The site gives information about the consumables that are provided.  We want to provide a link that allows them to click through to the shop and have those items already visible in the basket, but not at checkout so they can add more items!

I am using version 3.8 and it is hosted on a server on site.

Any help would be gratefully appreciated.

I don't think this can be achieved because the default functionality is that a form uses the post method to send the  selected data back to itself, where the model/controller inserts the item into the database.

You'd need to build a plugin that takes your querystring variables from the remote site and converts them to a form post before inserting them into the databse and redirecting them to the shopping cart...or, create forms on your remote site that post to a new MVC script/page on the nop site that inserts the item into the database and then redirects the user to the shopping cart.

It can be a way as what embryo stated!

I'm not sure about my way. But you can create a plugin with shopping cart api.
Which call from first website and add predefined items to the cart and redirecting to shopping cart of second website.