diff --git a/ugc/CMakeLists.txt b/ugc/CMakeLists.txt
index 20baffbe60..f1a77d90bb 100644
--- a/ugc/CMakeLists.txt
+++ b/ugc/CMakeLists.txt
@@ -4,6 +4,7 @@ set(
   SRC
   api.cpp
   api.hpp
+  types.hpp
 )
 
 add_library(${PROJECT_NAME} ${SRC})
diff --git a/ugc/api.cpp b/ugc/api.cpp
index 12ffd23e15..c8e47b9cca 100644
--- a/ugc/api.cpp
+++ b/ugc/api.cpp
@@ -10,25 +10,30 @@ namespace ugc
 {
 Api::Api(Index const & index) : m_index(index) {}
 
-void Api::GetStaticUGC(FeatureID const & id, Callback callback)
+void Api::GetUGC(FeatureID const & id, UGCCallback callback)
 {
-  m_thread.Push([=]() { GetStaticUGCImpl(id, callback); });
+  m_thread.Push([=]() { GetUGCImpl(id, callback); });
 }
 
-void Api::GetDynamicUGC(FeatureID const & id, Callback callback)
+void Api::GetUGCUpdate(FeatureID const & id, UGCUpdateCallback callback)
 {
-  m_thread.Push([=]() { GetDynamicUGCImpl(id, callback); });
+  m_thread.Push([=]() { GetUGCUpdateImpl(id, callback); });
 }
 
-void Api::GetStaticUGCImpl(FeatureID const & /* id */, Callback callback)
+void Api::GetUGCImpl(FeatureID const & /* id */, UGCCallback callback)
 {
   // TODO (@y, @mgsergio): retrieve static UGC
-  GetPlatform().RunOnGuiThread(callback);
+  UGC ugc(Rating({}, {}), {}, {});
+  GetPlatform().RunOnGuiThread([ugc, callback] { callback(ugc); });
 }
 
-void Api::GetDynamicUGCImpl(FeatureID const & /* id */, Callback callback)
+void Api::GetUGCUpdateImpl(FeatureID const & /* id */, UGCUpdateCallback callback)
 {
   // TODO (@y, @mgsergio): retrieve dynamic UGC
-  GetPlatform().RunOnGuiThread(callback);
+  UGCUpdate ugc(Rating({}, {}),
+                Attribute({}, {}),
+                ReviewAbuse({}, {}),
+                ReviewFeedback({}, {}));
+  GetPlatform().RunOnGuiThread([ugc, callback] { callback(ugc); });
 }
 }  // namespace ugc
diff --git a/ugc/api.hpp b/ugc/api.hpp
index 8b13853eae..eb6f731f39 100644
--- a/ugc/api.hpp
+++ b/ugc/api.hpp
@@ -2,6 +2,8 @@
 
 #include "base/worker_thread.hpp"
 
+#include "ugc/types.hpp"
+
 #include <functional>
 
 class Index;
@@ -12,17 +14,17 @@ namespace ugc
 class Api
 {
 public:
-  // TODO (@y, @mgsergio): replace void() by void(UGC const &).
-  using Callback = std::function<void()>;
+  using UGCCallback = std::function<void(UGC const &)>;
+  using UGCUpdateCallback = std::function<void(UGCUpdate const &)>;
 
   explicit Api(Index const & index);
 
-  void GetStaticUGC(FeatureID const & id, Callback callback);
-  void GetDynamicUGC(FeatureID const & id, Callback callback);
+  void GetUGC(FeatureID const & id, UGCCallback callback);
+  void GetUGCUpdate(FeatureID const & id, UGCUpdateCallback callback);
 
 private:
-  void GetStaticUGCImpl(FeatureID const & id, Callback callback);
-  void GetDynamicUGCImpl(FeatureID const & id, Callback callback);
+  void GetUGCImpl(FeatureID const & id, UGCCallback callback);
+  void GetUGCUpdateImpl(FeatureID const & id, UGCUpdateCallback callback);
 
   Index const & m_index;
   base::WorkerThread m_thread;
diff --git a/ugc/types.hpp b/ugc/types.hpp
new file mode 100644
index 0000000000..1a4aa3b956
--- /dev/null
+++ b/ugc/types.hpp
@@ -0,0 +1,180 @@
+#pragma once
+
+#include "indexer/feature_decl.hpp"
+
+#include <chrono>
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace ugc
+{
+struct RatingRecord
+{
+  RatingRecord(std::string const & key, float const value)
+    : m_key(key)
+    , m_value(value)
+  {
+  }
+
+  std::string m_key;
+  float m_value;
+};
+
+struct Rating
+{
+  Rating(std::vector<RatingRecord> const & ratings, float const aggValue)
+    : m_ratings(ratings)
+    , m_aggValue(aggValue)
+  {
+  }
+
+  std::vector<RatingRecord> m_ratings;
+  float m_aggValue;
+};
+
+class UID
+{
+public:
+  UID(uint64_t const hi, uint64_t const lo)
+    : m_hi(hi)
+    , m_lo(lo)
+  {
+  }
+
+  std::string ToString() const;
+
+private:
+  uint64_t m_hi;
+  uint64_t m_lo;
+};
+
+struct Author
+{
+  Author(UID const & uid, std::string const & name)
+    : m_uid(uid)
+    , m_name(name)
+  {
+  }
+
+  UID m_uid;
+  std::string m_name;
+};
+
+struct Text
+{
+  Text(std::string const & text, uint8_t const lang)
+    : m_text(text)
+    , m_lang(lang)
+  {
+  }
+
+  std::string m_text;
+  uint8_t m_lang;
+};
+
+struct Review
+{
+  using ReviewId = uint32_t;
+
+  Review(Text const & text, Author const & author,
+         float const rating, bool const evaluation,
+         std::chrono::time_point<std::chrono::system_clock> const & time)
+    : m_text(text)
+    , m_author(author)
+    , m_rating(rating)
+    , m_evaluation(evaluation)
+    , m_time(time)
+  {
+  }
+
+  ReviewId m_id;
+
+  Text m_text;
+  Author m_author;
+  // A rating of a review itself. It is accumulated from other users likes or dislakes.
+  float m_rating;
+  // A positive/negative evaluation given to a place by a user.
+  bool m_evaluation;
+  std::chrono::time_point<std::chrono::system_clock> m_time;
+};
+
+struct Attribute
+{
+  Attribute(std::string const & key, std::string const & value)
+    : m_key(key)
+    , m_value(value)
+  {
+  }
+
+  std::string m_key;
+  std::string m_value;
+};
+
+// struct Media
+// {
+//   std::unique_ptr<MediaImpl> m_data;
+// };
+
+struct UGC
+{
+  UGC(Rating const & rating,
+      std::vector<Review> const & reviews,
+      std::vector<Attribute> const & attributes)
+    : m_rating(rating)
+    , m_reviews(reviews)
+    , m_attributes(attributes)
+  {
+  }
+
+  Rating m_rating;
+  std::vector<Review> m_reviews;
+  std::vector<Attribute> m_attributes;
+  // Media m_media;
+};
+
+struct ReviewFeedback
+{
+  ReviewFeedback(bool const evaluation,
+                 std::chrono::time_point<std::chrono::system_clock> const time)
+    : m_evaluation(evaluation)
+    , m_time(time)
+  {
+  }
+
+  bool m_evaluation;
+  std::chrono::time_point<std::chrono::system_clock> m_time;
+};
+
+struct ReviewAbuse
+{
+  ReviewAbuse(std::string const & reason,
+              std::chrono::time_point<std::chrono::system_clock> const & time)
+    : m_reason(reason)
+    , m_time(time)
+  {
+  }
+
+  std::string m_reason;
+  std::chrono::time_point<std::chrono::system_clock> m_time;
+};
+
+struct UGCUpdate
+{
+  UGCUpdate(Rating ratings, Attribute attribute,
+            ReviewAbuse abuses, ReviewFeedback feedbacks)
+    : m_ratings(ratings)
+    , m_attribute(attribute)
+    , m_abuses(abuses)
+    , m_feedbacks(feedbacks)
+  {
+  }
+
+  Rating m_ratings;
+  Attribute m_attribute;
+
+  ReviewAbuse m_abuses;
+  ReviewFeedback m_feedbacks;
+};
+}  // namespace ugc