Around couple of weeks ago, Google+ api was first released with few functionalities. Now more features are added and an update is being released.

Here are some the new Google+ api features available now,

Search

• Activities api now includes a search method – This method searches and returns public activities
• People api now includes a search method – This method searches in public profiles

Activities

• People api now includes a listByActivity method – This method will returns people who re-shared a post as well as people who +1’d the post

Comments

• Comments api, list method returns list of comments for a single post or activity
• Comments api, get method returns a single comment for a given commentId

These newly added methods above would empower developers to programmatically add more features outside the Google+ interface.