Connects an application to a Supabase project the customer owns: the Postgres database, its auto-generated REST API, auth and storage. Three variables: the project URL, the anon key the browser may hold, and the service_role key that bypasses Row Level Security and must only ever be read server-side. The project stays the customer’s, on their own Supabase account and billing, so leaving the platform costs nothing, since the same three variables set anywhere else keep the app running. This is also the natural landing place for an app built elsewhere against Supabase: point it at the same project and the data never moves.
An admin enters these once, and the platform injects them as environment variables at deploy time. Your code reads them. It never sees a login screen or an SDK for this.
SUPABASE_URLSUPABASE_ANON_KEYSUPABASE_SERVICE_ROLE_KEY