For AI agents: a documentation index is available at https://developer.pexipengage.com/llms.txt.
Markdown versions of each page are available by sending an Accept: text/markdown header,
or by appending .md to the page URL.
Authentication
O auth2 (oauth2)
Retrieve an Access Token with the OAuth 2.0 flows described below before accessing the API. Once you have an access token, send it in the Authorization HTTP header to authenticate with the API.