A Library Key gives you a persistent shelf: saved books and recommendation history. Keys begin with PCL1-.
GET https://pagecompass.onrender.com/api/library/v1/availabilityPOST /api/library/v1 with body {}library_key appears exactly once. Store it in a credential vault. Never in a chat, URL, or log.GET /api/library/v1/me with Authorization: Bearer <key>. Require HTTP 200 and the expected account_id.Library Keys never grant billing, uploads, admin, narration, or OAuth access. Connections start read-only unless the human approves more.