Oyster is a Smartcard from Transport for London (TfL). You can use it to store PAYG credit up to £90, or up to 3 Travelcard or London Bus & Tram Pass Season tickets. Find out more about Oyster, including how to get an Oyster card, how to create an account, how to use Oyster, how to top up, and how to buy a Travelcard.