> 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/v4.6.0/getting-started/open-api.md).

# Open API

Helmut4 follows an API-first approach where all of the UI is based on our API. For cases where you may want to automate or connect Helmut4 to other third-party systems, our open API comes in handy as it offers 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)

{% 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/v4.6.0/support/requesting-support.md#moovits-support-portal)for assistance.
{% endhint %}

{% hint style="info" %}
Please be aware that the current accessible API definition is always referring to the latest Helmut4 release.\
<https://docs.helmut.de/helmut4-releases/getting-started/open-api>
{% endhint %}


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# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.helmut.de/helmut4-releases/v4.6.0/getting-started/open-api.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.