> For the complete documentation index, see [llms.txt](https://developer.paywall.one/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service.md).

# Card Storage Service

- [Card Saving](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/card-saving.md)
- [1. New Card](https://developer.paywall.one/payment-orchestration-integration-document/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. New Card / Tokenization](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/card-saving/2.-new-card-tokenization.md): You can store the tokenized card information obtained via the client on your servers, along with the relevant user details.
- [3. Saved Cards](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/card-saving/3.-saved-cards.md): It is recommended to retrieve stored card data only through your servers (Back-End). Direct access from your applications (End User) is not recomme
- [4. Delete Card](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/card-saving/4.-delete-card.md): It is recommended to perform the deletion of a stored card only through your servers (Back-End). Direct access from your applications (End User) is not recommended.
- [5. Update Card](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/card-saving/5.-update-card.md): It is recommended to perform stored card update operations only through your servers (Back-End). Direct access from your applications (End User) is not recommended.
- [Blacklist](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/blacklist.md)
- [1. Add](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/blacklist/1.-add.md): You can use this service to add a card to the blacklist.
- [2. Delete](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/blacklist/2.-delete.md): You can use this service to remove a card from the blacklist.
- [3. Query](https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service/blacklist/3.-query.md): You can use this service to query a card in the blacklist.