# Card Saving

- [1. New Card](https://paywall.gitbook.io/en/card-storage-service/card-saving/1.-new-card.md): It is recommended to perform the process of adding a new card only through your servers (Back-End). Direct access from your applications (End Users) is not recommended.
- [2. List Cards](https://paywall.gitbook.io/en/card-storage-service/card-saving/2.-list-cards.md): It is recommended to list card data only through your servers (Back-End). Direct access from your applications (End Users) is not recommended.
- [3. Delete Card](https://paywall.gitbook.io/en/card-storage-service/card-saving/3.-delete-card.md): It is recommended to perform the process of deleting a registered card only through your servers (Back-End). Direct access from your applications (End Users) is not recommended.
- [4. Update Card](https://paywall.gitbook.io/en/card-storage-service/card-saving/4.-update-card.md): It is recommended to perform the process of updating a registered card only through your servers (Back-End). Direct access from your applications (End Users) is not recommended.