> 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/ecom/integrate-the-d1-api.md).

# Integrate the D1 API

Use this section to set up connectivity and security. Then use the OpenAPI reference to integrate inbound and outbound APIs.

### What you need to do

* Set up mutual TLS (mTLS) for inbound and outbound connectivity.
* Get OAuth 2.0 access tokens for inbound API calls.
* Encrypt sensitive data using JWE where required.

### Documentation

<table data-view="cards"><thead><tr><th>Title</th><th data-card-target data-type="content-ref">Target</th></tr></thead><tbody><tr><td>D1 API overview</td><td><a href="/spaces/Ii0bpgsSo3R04ofjLwPG/pages/gRmLTVTmTaREDBv3P48K">/spaces/Ii0bpgsSo3R04ofjLwPG/pages/gRmLTVTmTaREDBv3P48K</a></td></tr><tr><td>Set up mutual TLS (mTLS)</td><td><a href="/spaces/Ii0bpgsSo3R04ofjLwPG/pages/x7ydM8VbsjmRUgRNRpAq">/spaces/Ii0bpgsSo3R04ofjLwPG/pages/x7ydM8VbsjmRUgRNRpAq</a></td></tr><tr><td>Get an OAuth 2.0 access token</td><td><a href="/spaces/Ii0bpgsSo3R04ofjLwPG/pages/iXI0jLK1udscV1SFW4qP">/spaces/Ii0bpgsSo3R04ofjLwPG/pages/iXI0jLK1udscV1SFW4qP</a></td></tr><tr><td>Encrypt sensitive data</td><td><a href="/spaces/Ii0bpgsSo3R04ofjLwPG/pages/GyDF8dvYq4vflhaBrzQ5">/spaces/Ii0bpgsSo3R04ofjLwPG/pages/GyDF8dvYq4vflhaBrzQ5</a></td></tr><tr><td>D1 API reference</td><td><a href="/spaces/Ii0bpgsSo3R04ofjLwPG/pages/IUI6a5pYGOKQKWXIhWE2">/spaces/Ii0bpgsSo3R04ofjLwPG/pages/IUI6a5pYGOKQKWXIhWE2</a></td></tr></tbody></table>


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