LinkedIn

LinkedIn's API is highly restrictive and requires Partner Program approval, making it inaccessible for most developers.

While technically well-designed with OAuth2 authentication and comprehensive social media features, the approval process takes 3-6 months with less than 10% acceptance rate. The API covers profile data, content sharing, and marketing features, but only approved partners can access meaningful functionality.

For businesses needing LinkedIn integration, expect significant barriers to entry and consider alternative social media APIs unless you meet their strict partnership requirements.