Gen AI HTTP API REFERENCE

Hello!
After hours of browsing the docs I can say it’s a complete mess.
Please if anyone could share the HTTP API REFERENCE?
Sincerely,
Yours

HERE IT IS:

WOULD LOVE TO UNDERSTAND AS WELL THE STATUS OF THE JAVA SDK. IS IT UP TO DATE?

There is a JAVA DOC here: Overview (google-genai 0.5.0-SNAPSHOT API)
But where is the actual library?

Here it is:

“Modified by moderator”