diff --git a/apps/api/serializers.py b/apps/api/serializers.py
index d59bdc43..c417ccc6 100644
--- a/apps/api/serializers.py
+++ b/apps/api/serializers.py
@@ -4,10 +4,14 @@
 
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.auth.models import User
-from rest_framework.serializers import ModelSerializer
+from django.utils import timezone
+from rest_framework import serializers
+
+from member.api.serializers import ProfileSerializer, MembershipSerializer
+from note.models import Alias
 
 
-class UserSerializer(ModelSerializer):
+class UserSerializer(serializers.ModelSerializer):
     """
     REST API Serializer for Users.
     The djangorestframework plugin will analyse the model `User` and parse all fields in the API.
@@ -22,7 +26,7 @@ class UserSerializer(ModelSerializer):
         )
 
 
-class ContentTypeSerializer(ModelSerializer):
+class ContentTypeSerializer(serializers.ModelSerializer):
     """
     REST API Serializer for Users.
     The djangorestframework plugin will analyse the model `User` and parse all fields in the API.
@@ -31,3 +35,39 @@ class ContentTypeSerializer(ModelSerializer):
     class Meta:
         model = ContentType
         fields = '__all__'
+
+
+class OAuthSerializer(serializers.ModelSerializer):
+    """
+    Informations that are transmitted by OAuth.
+    For now, this includes user, profile and valid memberships.
+    This should be better managed later.
+    """
+    normalized_name = serializers.SerializerMethodField()
+
+    profile = ProfileSerializer()
+
+    memberships = serializers.SerializerMethodField()
+
+    def get_normalized_name(self, obj):
+        return Alias.normalize(obj.username)
+
+    def get_memberships(self, obj):
+        return serializers.ListSerializer(child=MembershipSerializer()).to_representation(
+            obj.memberships.filter(date_start__lte=timezone.now(), date_end__gte=timezone.now()))
+
+    class Meta:
+        model = User
+        fields = (
+            'id',
+            'username',
+            'normalized_name',
+            'first_name',
+            'last_name',
+            'email',
+            'is_superuser',
+            'is_active',
+            'is_staff',
+            'profile',
+            'memberships',
+        )
diff --git a/apps/api/views.py b/apps/api/views.py
index c8ccd442..9718336d 100644
--- a/apps/api/views.py
+++ b/apps/api/views.py
@@ -4,11 +4,14 @@
 from django.contrib.auth.models import User
 from rest_framework.generics import RetrieveAPIView
 
-from .serializers import UserSerializer
+from .serializers import OAuthSerializer
 
 
 class UserInformationView(RetrieveAPIView):
-    serializer_class = UserSerializer
+    """
+    These fields are give to OAuth authenticators.
+    """
+    serializer_class = OAuthSerializer
 
     def get_queryset(self):
         return User.objects.filter(pk=self.request.user.pk)