Thanks. I used to use virtual cards from Bank of America and Citibank but looks like it's just an after thought to the big banks now...
Do you know a similar service outside US?
You can get virtual cards and virtual disposable cards with Revolut but it costs a little fee or it‘s free with the premium/metal subscription
Revolut's disposable card is awesome. I use it constantly.
In New Zealand we have debit cards, so they act just like a normal credit card, except it needs to have money in the account for the transaction to work. So you tie it to an account that you put money into, instead of say, your every-day spending account which could contain a lot more money.
In the UK, the bank will just let the transaction go through & then charge you a hefty fee for an unapproved overdraft.