Hacker News Reader

I think the more relevant functionality is called in France "e-carte bleue" : https://fr.wikipedia.org/wiki/Paiement_sur_Internet#La_e-car... (Sorry, only in French).

You generate a fake card number, this number is linked with an expiration date AND a maximal amount that can be charged.

The quality of the service varies between banks though, I remember my previous bank who forced me to go over a sketchy-looking website and use a Flash applet to generate the card...

AFAIK it's not possible to create a card with a monthly chargeable maximum amount, only to set the total amount for the card's lifetime, which limits the interest of the use for recurring payments.

Paypal had this years ago as well as a plugin, and they got rid of it unfortunately.

Citi had virtual CCs some time ago. It was very annoying to use and buried somewhere, so I didn't really use it. No idea if still supported.