HI
I am very familiar with third party APIS. FaceBook. twitter. youtube. instagram. I have created many apps and WP plugins .
Here are some of my simliar samples:
1, A wordpress plugin, when you create post auto share to your fans page.
2, An app you add rss, will auto update post to your gourps and pages when rss update.
3, Album fetch you and your friends images.