> For the complete documentation index, see [llms.txt](https://apidocs.gsped.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://apidocs.gsped.com/gsped-api-english-version/overview/autenticazione.md).

# Authentication

In order to be called, the Gsped API needs an authentication.

When you are given the credentials, an API key is given to you to be used for the REST calls

This API key must be written in the call HEADER with the **X-API-KEY** key