Extract relationship between Campaign and Emails using API

[Data_Analytics]

Under each asset, click one Email, you can see "Used By" tab. There are the campaigns which are using this email. Can you please advise how to extract the relationship between Campaign and Emails using API? which end point I should use?

[SanfordWhiteman]

There's no endpoint that returns only this relationship.

You must extract Send Email activities and build the relationship up from contextual data.