Webhooks are now available at the organization level on GitHub.com. Organization webhooks send events for all repositories in an organization. They also include new events for repository creation, team membership, and more.
If you’re extending GitHub into your internal systems, organization webhooks save you time by helping you configure integrations across multiple repositories in one place. The addition of organizational-level events, like team membership, open up new possibilties for integrators building applications that work with GitHub.
For all the details, check out our updated webhook developer guide.