> For the complete documentation index, see [llms.txt](https://docs.helmut.de/helmut4-releases/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.helmut.de/helmut4-releases/v4.7.2/getting-started/open-api.md).

# Open API

Helmut4 follows an API-first approach, where the entire UI is built on our API. In instances where you wish to automate or integrate Helmut4 with other third-party systems, our open API proves invaluable, providing an extremely powerful set of functionalities.

The link to our OpenAPI documentation can be accessed [here](http://repo.moovit24.de:8889/?urls.primaryName=Helmut4%20-%20Users)

<figure><img src="/files/sn17XBlcNsMFYrvwZ0Eh" alt=""><figcaption><p>Helmut4 API</p></figcaption></figure>

{% hint style="info" %}
If you have any questions regarding the use of our OpenAPI, please reach out to our support team via the [support portal ](/helmut4-releases/v4.7.2/support/requesting-support.md#moovits-support-portal)for assistance.\
\
Please be aware that the current accessible ***API definition*** is &#x61;***lways referring*** to the ***latest Helmut4 release***.\
<https://docs.helmut.de/helmut4-releases/getting-started/open-api>
{% endhint %}