> 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/blacklist.md).

# Blacklist

- [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.