> For the complete documentation index, see [llms.txt](https://guide.xs2a.com/xs2a/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.xs2a.com/xs2a/integration-cs/getting-started/api-documentation.md).

# API documentation

## Quickstart

Our quickstart gives you a short explanation of how to use some of our products with [Javascript-Widget](/xs2a/integration-cs/integration-variants/javascript-widget.md) as an [integration variant](/xs2a/integration-cs/getting-started/decide-on-an-integration-variant.md).

{% embed url="<https://docs.xs2a.com/>" %}

## Technical documentation

Here you find all related information to the technical part of the integration. We provide information about our endpoints as well as request and response examples. If you try to find any information about a technical part of the integration make sure to have a look here.

{% embed url="<https://docs.xs2a.com/swagger/>" %}

## **OnlineÜberweisen documentation**

If you want to use our payment brand onlineüberweisen, we suggest reading the integration guide. &#x20;

{% embed url="<https://manage.onlineueberweisen.com/merchant/documentation/payments/api/payment/integration>" %}
Onlineüberweisen Integration Guide
{% endembed %}

Continue with the [next step](/xs2a/integration-cs/getting-started/decide-on-an-integration-variant.md) to get an overview of our integration variants.

{% content-ref url="/pages/-MMGYsau6vLOq5NZhdpS" %}
[Integration variants](/xs2a/integration-cs/getting-started/decide-on-an-integration-variant.md)
{% endcontent-ref %}