anchor.diff:  + Response 401 (application/json)
   
           {}
  -
  -
  -You can also provide a value for "popular" parameter. With "1", you will receive just popular tags.
  -
  -+ Request
  -
  -    + Header
  -
  -            Accept: application/vnd.api+json;revision=1
  -            Authorization: Token your-token-here
  -
  -
  -+ Response 200 (application/json)
  -
  -        {"tags"=>[{"id"=>1, "name"=>"cycling", "total_projects"=>22, "visible"=>true}], "meta"=>{"page"=>1, "total"=>10, "total_pages"=>1}}
   
   
   ### Create a tag [POST]
  
positive.code: 
          {"errors":{"name":["has already been taken"]}}
  
  ## Tag [/tags/:id]
  ### Fetch tag information [GET]
  
  + Request
  
negative.code: 
          {"errors":{"name":["has already been taken"]}}
  
  ## Tag [/tags/{id}]
  
  ### Update a tag [PUT]
  
  Requires the user to be an admin.
  