Twitter:
http://urls.api.twitter.com/1/urls/count.json?url=http://new...
LinkedIn: http://www.linkedin.com/cws/share-count?url=http://news.ycom...
These APIs are marked private (as opposed to Facebook's) so use at your own risk.
LinkedIn: http://www.linkedin.com/cws/share-count?url=http://news.ycom...
These APIs are marked private (as opposed to Facebook's) so use at your own risk.
Is that true?
http://urls.api.twitter.com/1/urls/count.json?url=http://new...
http://urls.api.twitter.com/1/urls/count.json?url=http://new...
http://urls.api.twitter.com/1/urls/count.json?url=http://new...
Facebook and Twitter, do basic normalization, but do not unshorten shortened links.
edit: This has already been discussed on HN: http://news.ycombinator.com/item?id=577457
edit 2: graphs.facebook.com will aggressively and unfortunately normalize any YouTube link to youtube.com. See, for example, http://graph.facebook.com/http://www.youtube.com/watch?v=ZB8... This give the number of shares for youtube.com, not this individual video. I am not sure how to get facebook share stats for a particular YouTube video.
Which is also a public API.
https://www.googleapis.com/buzz/v1/activities/count?alt=json...
http://otter.topsy.com/urlinfo.json?url=http://news.ycombina...