Escaping from your Google+ Stream
Use Google Takeout to download a copy of your Google+ Stream posts as HTML. The structure of the HTML is described here.
Escaping to your Google+ Stream
You can add new thoughts to your Stream through Google+ for both your computer and your phone.
The Google+ Platform provides a way to import and export data from your Google+ Stream. This RESTful API supports the ability to retrieve your posts including all of the comments. Results can be retrieved in JSON format.
Programmers who wish to get a copy of their Google+ data can choose between client libraries in a number of different languages, or by using tools such as the Google API Explorer or the command-line tool, oacurl. There are also forms to try any API call right in the API documentation.