Installing the Android SDK on a headless server doesn’t seem to be very well documented. I recently needed to do this to get the SDK installed on a TeamCity build agent to automate Android builds and tests.
Below are some simple instructions to help you along the way. I’m using a Mac, so you may need to use slightly different commands if you’re using Linux.
Google hasn’t made any official announcements regarding a public API, but there is already a mailing list you can sign up for that will let you know when one is available. If you’re a developer and you’re eager to get hacking on the Google Plus API, be sure to sign up! Knowing Google we’ll see an API released in the near future (though I suspect they still have quite a few features and bug fixes to put out first)!