Searches, Briefs, Posts and Brain come with Premium, for a site you have claimed.
Brain is part of Premium
The site as mttr reads it, as five files for its repository: what it does and where, how its pages read, the facts its structured data states, what is worth writing, and every brief so far.
It is part of mttr Premium, for a site you have claimed. Sign in to the account that claimed the site, or claim it.