Add limit check

app/controllers/api/v1/accounts_controller.rb

@@ -15,6 +15,7 @@ class Api::V1::AccountsController < Api::BaseController
   before_action :check_account_approval, except: [:index, :create]
   before_action :check_account_confirmation, except: [:index, :create]
   before_action :check_enabled_registrations, only: [:create]
+  before_action :check_accounts_limit, only: [:index]
 
   skip_before_action :require_authenticated_user!, only: :create
 
@@ -96,6 +97,10 @@ class Api::V1::AccountsController < Api::BaseController
     raise(ActiveRecord::RecordNotFound) if @account.local? && !@account.user_confirmed?
   end
 
+  def check_accounts_limit
+    raise(Mastodon::ValidationError) if account_ids.size > DEFAULT_ACCOUNTS_LIMIT
+  end
+
   def relationships(**options)
     AccountRelationshipsPresenter.new([@account], current_user.account_id, **options)
   end

app/controllers/api/v1/statuses_controller.rb

@@ -5,10 +5,11 @@ class Api::V1::StatusesController < Api::BaseController
 
   before_action -> { authorize_if_got_token! :read, :'read:statuses' }, except: [:create, :update, :destroy]
   before_action -> { doorkeeper_authorize! :write, :'write:statuses' }, only:   [:create, :update, :destroy]
-  before_action :require_user!, except:  [:index, :show, :context]
-  before_action :set_statuses, only:     [:index]
-  before_action :set_status, only:       [:show, :context]
-  before_action :set_thread, only:       [:create]
+  before_action :require_user!, except:      [:index, :show, :context]
+  before_action :set_statuses, only:         [:index]
+  before_action :set_status, only:           [:show, :context]
+  before_action :set_thread, only:           [:create]
+  before_action :check_statuses_limit, only: [:index]
 
   override_rate_limit_headers :create, family: :statuses
   override_rate_limit_headers :update, family: :statuses
@@ -135,6 +136,10 @@ class Api::V1::StatusesController < Api::BaseController
     render json: { error: I18n.t('statuses.errors.in_reply_not_found') }, status: 404
   end
 
+  def check_statuses_limit
+    raise(Mastodon::ValidationError) if status_ids.size > DEFAULT_STATUSES_LIMIT
+  end
+
   def status_ids
     Array(statuses_params[:ids]).uniq.map(&:to_i)
   end