> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/secure-card-display/integrate-d1-api/d1-api-summary.md).

# D1 API summary

Use this checklist to validate the D1 API endpoints you need to integrate Secure Card Display.

### Required APIs

| API                                                                                                                                                                                                                                                                              | Inbound/Outbound    | Description                                           |
| -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------- | ----------------------------------------------------- |
| [Get authorization token](/secure-card-display/integrate-d1-api/d1-api-reference/inbound-api-to-d1/oauth2-api.md#post-oauth2-token)                                                                                                                                              | Issuer -> Thales D1 | Get an OAuth 2.0 access token to call the D1 backend. |
| [Create card](/secure-card-display/integrate-d1-api/d1-api-reference/inbound-api-to-d1/card-api.md#post-v2-issuers-issuerid-cards) or [Register card](/secure-card-display/integrate-d1-api/d1-api-reference/inbound-api-to-d1/card-api.md#put-v2-issuers-issuerid-cards-cardid) | Issuer -> Thales D1 | Create or register a card in the D1 backend.          |
| [Renew card](/secure-card-display/integrate-d1-api/d1-api-reference/inbound-api-to-d1/card-api.md#post-v2-issuers-issuerid-cards-cardid-operations-renew)                                                                                                                        | Issuer -> Thales D1 | Renew a card.                                         |
| [Replace card](/secure-card-display/integrate-d1-api/d1-api-reference/inbound-api-to-d1/card-api.md#post-v2-issuers-issuerid-cards-cardid-operations-replace)                                                                                                                    | Issuer -> Thales D1 | Replace a card.                                       |
| [Delete card](/secure-card-display/integrate-d1-api/d1-api-reference/inbound-api-to-d1/card-api.md#post-v2-issuers-issuerid-cards-cardid-operations-delete)                                                                                                                      | Issuer -> Thales D1 | Delete a card from the D1 backend.                    |


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