On the fly generated products

Hi,

I am selling products which are on the fly generated pdf sent by email. Those files are generated with a few parameters included in an URL clicked. I have a lot of products with very small price (as an app store). They all have the same price. I don’t want those products to be visible on the site, they are just bought from a click on a button in an email received by users.

Do i have to create every product manually in the store and use a hook to generate the pdf as i wish ?
Or is there another way of making my users pay online and generate the product on the fly, with a generic payment for a service.

Any idea ?

Thank you very much

https://www.ads-software.com/plugins/woocommerce/