Do Paris Taxis accept Credit Cards?

Yes, but be sure and get into the official taxi line; don't be swayed by someone offering you a ride. It's a fixed price from CDG to left bank or right bank-price depending on which you are going to.

They are required to but it is not unheard for the device to be 'broken' as cabbies often prefer cash. So show your credit card when you get the cab and make sure they agree. I always have the 65 Euro I need in hand and pay cash. Tips not necessary.

Taxis must absolutely accept credit cards: Visa/MC. If their card processing equipment is not functioning, they are legally prohibited from picking up a fare.