You can leverage the GitHub Events API to perform such task and retrieve a JSON formatted response.
The Events API is a read-only interface to all the event types that
power the various activity streams on GitHub.
- syntax:
GET /users/:user/events
- example: https://api.github.com/users/mojombo/events
An alternative way is to subscribe to the public RSS feed of a user.
For instance, Mojombo's public feed Url would be
- https://github.com/mojombo.atom
Also If you want to view Full activities performed by all contributors ,you can also go to
If Private
https://github.com/orgs/YOURORGANISATION/dashboard
If Public
https://github.com/REPOSITORYOWNER?tab=activity