diff --git a/app/models/block.rb b/app/models/block.rb
index 18ff28f..7a5dcc8 100644
--- a/app/models/block.rb
+++ b/app/models/block.rb
@@ -314,6 +314,14 @@ class Block < ApplicationRecord
     self.observers << block
   end
 
+  def api_content
+    nil
+  end
+
+  def display_api_content_by_default?
+    false
+  end
+
   private
 
   def home_page_path
diff --git a/lib/noosfero/api/entities.rb b/lib/noosfero/api/entities.rb
index 9943564..24650a4 100644
--- a/lib/noosfero/api/entities.rb
+++ b/lib/noosfero/api/entities.rb
@@ -88,6 +88,7 @@ module Noosfero
         root 'blocks', 'block'
         expose :id, :type, :settings, :position, :enabled
         expose :mirror, :mirror_block_id, :title
+        expose :api_content, if: lambda { |object, options| options[:display_api_content] || object.display_api_content_by_default? }
       end
 
       class Box < Entity
diff --git a/lib/noosfero/api/v1/blocks.rb b/lib/noosfero/api/v1/blocks.rb
index ad7490e..a32ed9e 100644
--- a/lib/noosfero/api/v1/blocks.rb
+++ b/lib/noosfero/api/v1/blocks.rb
@@ -9,7 +9,7 @@ module Noosfero
             if block.owner.kind_of?(Profile)
               return forbidden! unless block.owner.display_info_to?(current_person)
             end
-            present block, :with => Entities::Block
+            present block, :with => Entities::Block, display_api_content: true
           end
         end
       end
diff --git a/test/api/blocks_test.rb b/test/api/blocks_test.rb
index 57a0d46..fc9388e 100644
--- a/test/api/blocks_test.rb
+++ b/test/api/blocks_test.rb
@@ -62,4 +62,25 @@ class BlocksTest < ActiveSupport::TestCase
     json = JSON.parse(last_response.body)
     assert_equal block.id, json["block"]["id"]
   end
+
+  should 'display api content by default' do
+    box = fast_create(Box, :owner_id => environment.id, :owner_type => Environment.name)
+    block = fast_create(Block, box_id: box.id)
+    get "/api/v1/blocks/#{block.id}?#{params.to_query}"
+    json = JSON.parse(last_response.body)
+    assert json["block"].key?('api_content')
+  end
+
+  should 'display api content of a specific block' do
+    class SomeBlock < Block
+      def api_content
+        {some_content: { name: 'test'} }
+      end
+    end
+    box = fast_create(Box, :owner_id => environment.id, :owner_type => Environment.name)
+    block = fast_create(SomeBlock, box_id: box.id)
+    get "/api/v1/blocks/#{block.id}?#{params.to_query}"
+    json = JSON.parse(last_response.body)
+    assert_equal "test", json["block"]["api_content"]["some_content"]["name"]
+  end
 end
diff --git a/test/api/boxes_test.rb b/test/api/boxes_test.rb
index 1fa99f1..713a40d 100644
--- a/test/api/boxes_test.rb
+++ b/test/api/boxes_test.rb
@@ -38,4 +38,13 @@ class BoxesTest < ActiveSupport::TestCase
     assert_equal box.id, json["boxes"].first["id"]
   end
 
+  should 'not display block api_content by default' do
+    Environment.delete_all
+    environment = fast_create(Environment, :is_default => true)
+    box = fast_create(Box, :owner_id => environment.id, :owner_type => 'Environment')
+    block = fast_create(Block, box_id: box.id)
+    get "/api/v1/environments/default/boxes?#{params.to_query}"
+    json = JSON.parse(last_response.body)
+    assert !json["boxes"].first["blocks"].first.key?('api_content')
+  end
 end
--
libgit2 0.21.2