diff --git a/app/models/user.rb b/app/models/user.rb
index 0819e57..30f5ecc 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -94,6 +94,12 @@ class User < ActiveRecord::Base
     end
   end
 
+  def signup
+    User.transaction do
+      self.person.save if self.save
+    end
+  end
+
   has_one :person, :dependent => :destroy
   belongs_to :environment
 
diff --git a/lib/noosfero/api/entities.rb b/lib/noosfero/api/entities.rb
index 5e75adf..5f8636f 100644
--- a/lib/noosfero/api/entities.rb
+++ b/lib/noosfero/api/entities.rb
@@ -112,6 +112,7 @@ module Noosfero
         root 'users', 'user'
         expose :id
         expose :login
+        expose :email
         expose :person, :using => Profile
         expose :activated?, as: :activated
         expose :permissions do |user, options|
diff --git a/lib/noosfero/api/session.rb b/lib/noosfero/api/session.rb
index 5721ee9..128afd0 100644
--- a/lib/noosfero/api/session.rb
+++ b/lib/noosfero/api/session.rb
@@ -43,11 +43,14 @@ module Noosfero
         # this return is just to improve the clarity of the execution path
         return unless test_captcha(remote_ip, params, environment)
         user = User.new(attrs)
-        if user.save
-          user.generate_private_token! if user.activated?
-          present user, :with => Entities::UserLogin
+        person = Person.new(name: params[:name], identifier: user.login)
+        user.person = person
+        if user.signup
+            user.generate_private_token! if user.activated?
+            present user, :with => Entities::UserLogin
         else
-          message = user.errors.to_json
+          user.destroy
+          message = user.errors.as_json.merge(person.errors.as_json).to_json
           render_api_error!(message, 400)
         end
       end
--
libgit2 0.21.2