# Sign in Sign in with a passkey, GitHub or Google; the API sets an HttpOnly session cookie that the account, keys and usage pages send back on every call. The ceremony belongs to the API: passkey registration and assertion, and the two OAuth redirects. Signed out, the route is four buttons and a paragraph. ## Why an account exists Only the metered surfaces need one — your own docsets, the hosted MCP endpoint, and private forks of the concept tree. Every published page, including the whole llms family, stays readable and unmetered without it.