Create an organization, library, and API key with no account.

Anonymous — mints the key, so send no Authorization header. Give it an email address and it returns a ready-to-use organization, library, API key, and a claim URL to hand the user so they can attach the library to a real account later. Use this when an agent needs somewhere to put images before the user has signed up. https://raster.app/docs/guides/start-without-an-account