> For the complete documentation index, see [llms.txt](https://docs.videc.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.videc.de/june5-3.7/en/web-api/authentifizierungskonzept.md).

# Authentication Concept

The authentication concept is based on the OAuth standard. To receive return values from the JUNE5 Web API, a user must authenticate first, otherwise they will not receive the requested data.

Upon successful login via the Web API, the requester receives a token. This token must be independently maintained by the requesting client application and communicated to the server with each request. The JUNE5 server checks the validity of the token with each request.

A token has a preset lifetime of 15 minutes. If the token is not used for more than this duration for server communication, it expires. This requires a repeated login to the server for subsequent communication.

![](/files/LzT7bVh0SVwfGWGjYMCQ)

Please note:

* The token must be transmitted in the "June5-Token" field in the header of each subsequent HTTP request to the server.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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.videc.de/june5-3.7/en/web-api/authentifizierungskonzept.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.