GitHub has opened a public preview of a new Enterprise Installation API for GitHub Apps. Previously, an app that needed to confirm its enterprise-level installation had to paginate through every installation to locate the right record — a fragile and expensive operation at scale. The new endpoint lets an app ask directly: am I installed on this enterprise, and what is my installation ID? For teams building internal GitHub Apps or ISV integrations that target enterprise accounts, this reduces boilerplate and eliminates a common source of rate-limit pressure during app startup. The API was surfaced from a GitHub Actions community request and is documented in the GitHub Apps REST API reference. Because it is a purely additive endpoint it carries no breaking implications for existing apps.