# 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.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://developer.paywall.one/payment-orchestration-integration-document/card-storage-service.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.