diff --git a/app/controllers/grape_swagger_rails/application_controller.rb b/app/controllers/grape_swagger_rails/application_controller.rb
index 6bcd837..6b88797 100644
--- a/app/controllers/grape_swagger_rails/application_controller.rb
+++ b/app/controllers/grape_swagger_rails/application_controller.rb
@@ -7,6 +7,7 @@ class ApplicationController < ActionController::Base
     end
 
     def index
+      run_before_index
     end
 
     private
@@ -15,5 +16,10 @@ def run_before_action
       return unless GrapeSwaggerRails.options.before_action
       instance_exec(request, &GrapeSwaggerRails.options.before_action)
     end
+    
+    def run_before_index
+      return unless GrapeSwaggerRails.options.before_index
+      instance_exec(request, &GrapeSwaggerRails.options.before_index)
+    end
   end
 end
diff --git a/lib/grape-swagger-rails.rb b/lib/grape-swagger-rails.rb
index f8e0294..0fe9739 100644
--- a/lib/grape-swagger-rails.rb
+++ b/lib/grape-swagger-rails.rb
@@ -15,6 +15,14 @@ def before_action(&block)
         before_action_proc
       end
     end
+    
+    def before_index(&block)
+      if block_given?
+        self.before_index_proc = block
+      else
+        before_index_proc
+      end
+    end
   end
 
   mattr_accessor :options
@@ -36,6 +44,7 @@ def before_action(&block)
     supported_submit_methods: %w(get post put delete patch),
 
     before_action_proc:     nil, # Proc used as a controller before action
+    before_index_proc:      nil, # Proc used as a controller before every index call
 
     hide_url_input:         false,
     hide_api_key_input:     false