https://developers.google.com/+/api/
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- People
People is a list of person resources, each of which represents a Google+ user. People methods enable your application to get a person's profile, search through profiles, and list all of the people who have +1'd or reshared a particular activity. Each person has an uniquely identifying ID.
get Get a person's profile.
search Search all public profiles.
listByActivityList all of the people in the specified collection for a particular activity.
- Activities
An activity is a note that a user posts to their stream. Activity methods enable your application to list a collection of activities, get an activity and search through activities.
list List all of the activities in the specified collection for a particular user.
get Get an activity.
search Search public activities.
- Comments
A comment is a reply to an activity. Comment methods enable your application to list a collection of comments and get a comment.
list List all of the comments for an activity.
get Get a comment.