What is a LinkedIn URN?
A LinkedIn URN is LinkedIn’s own id for a post, a comment, a person or a company, written like urn:li:activity:7514393874887270401.
The kinds you meet most: urn:li:activity: is a post as it appears in a feed; urn:li:ugcPost: and urn:li:share: are the post’s content; urn:li:comment:(ugcPost:…,…) is a comment on it.
A post’s link carries one: /feed/update/urn:li:activity:…/, or -activity- and the number in a /posts/ link. A repost has its own activity, and its share URN points to the original post.
The number in an activity, ugcPost or share URN holds the moment the post was made: shift it right by 22 bits for milliseconds since 1970.
In the API
The call that takes it or gives it back, with its price. With no key, it answers from the demo.
GET /v1/linkedin/postGet one LinkedIn post