> 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

authentication method for API calls

The Gsped APIs require authentication.

When your user account is issued, you also receive an APIKEY to use for REST calls.

It must be sent in the request HEADER with the key **X-API-KEY**.