diff --git a/ydb/core/tx/replication/service/logging.h b/ydb/core/tx/replication/service/logging.h
new file mode 100644
index 000000000000..7940d5b0e731
--- /dev/null
+++ b/ydb/core/tx/replication/service/logging.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include <ydb/library/actors/core/log.h>
+#include <ydb/library/services/services.pb.h>
+
+#define LOG_T(stream) LOG_TRACE_S (*TlsActivationContext, NKikimrServices::REPLICATION_SERVICE, "" << SelfId() << " " << stream)
+#define LOG_D(stream) LOG_DEBUG_S (*TlsActivationContext, NKikimrServices::REPLICATION_SERVICE, "" << SelfId() << " " << stream)
+#define LOG_I(stream) LOG_INFO_S  (*TlsActivationContext, NKikimrServices::REPLICATION_SERVICE, "" << SelfId() << " " << stream)
+#define LOG_N(stream) LOG_NOTICE_S(*TlsActivationContext, NKikimrServices::REPLICATION_SERVICE, "" << SelfId() << " " << stream)
+#define LOG_W(stream) LOG_WARN_S  (*TlsActivationContext, NKikimrServices::REPLICATION_SERVICE, "" << SelfId() << " " << stream)
+#define LOG_E(stream) LOG_ERROR_S (*TlsActivationContext, NKikimrServices::REPLICATION_SERVICE, "" << SelfId() << " " << stream)
diff --git a/ydb/core/tx/replication/service/topic_reader.cpp b/ydb/core/tx/replication/service/topic_reader.cpp
index 3a549cac3cfd..18e2219b164d 100644
--- a/ydb/core/tx/replication/service/topic_reader.cpp
+++ b/ydb/core/tx/replication/service/topic_reader.cpp
@@ -1,3 +1,4 @@
+#include "logging.h"
 #include "topic_reader.h"
 #include "worker.h"
 
@@ -12,6 +13,8 @@ class TRemoteTopicReader: public TActor<TRemoteTopicReader> {
 
     void Handle(TEvWorker::TEvHandshake::TPtr& ev) {
         Worker = ev->Sender;
+        LOG_D("Handshake"
+            << ": worker# " << Worker);
 
         Y_ABORT_UNLESS(!ReadSession);
         Send(YdbProxy, new TEvYdbProxy::TEvCreateTopicReaderRequest(Settings));
@@ -19,16 +22,23 @@ class TRemoteTopicReader: public TActor<TRemoteTopicReader> {
 
     void Handle(TEvYdbProxy::TEvCreateTopicReaderResponse::TPtr& ev) {
         ReadSession = ev->Get()->Result;
+        LOG_D("Create read session"
+            << ": session# " << ReadSession);
 
         Y_ABORT_UNLESS(Worker);
         Send(Worker, new TEvWorker::TEvHandshake());
     }
 
-    void Handle(TEvWorker::TEvPoll::TPtr&) {
+    void Handle(TEvWorker::TEvPoll::TPtr& ev) {
+        LOG_D("Handle " << ev->Get()->ToString());
+
         Y_ABORT_UNLESS(ReadSession);
         Send(ReadSession, new TEvYdbProxy::TEvReadTopicRequest());
 
         if (CommitOffset) {
+            LOG_D("Commit offset"
+                << ": offset# " << CommitOffset);
+
             Send(YdbProxy, new TEvYdbProxy::TEvCommitOffsetRequest(
                 Settings.Topics_[0].Path_,
                 Settings.Topics_[0].PartitionIds_[0],
@@ -39,6 +49,8 @@ class TRemoteTopicReader: public TActor<TRemoteTopicReader> {
     }
 
     void Handle(TEvYdbProxy::TEvReadTopicResponse::TPtr& ev) {
+        LOG_D("Handle " << ev->Get()->ToString());
+
         auto& result = ev->Get()->Result;
         TVector<TEvWorker::TEvData::TRecord> records(Reserve(result.Messages.size()));
 
@@ -53,12 +65,16 @@ class TRemoteTopicReader: public TActor<TRemoteTopicReader> {
     }
 
     void Handle(TEvYdbProxy::TEvCommitOffsetResponse::TPtr& ev) {
+        LOG_D("Handle " << ev->Get()->ToString());
+
         if (!ev->Get()->Result.IsSuccess()) {
+            LOG_N("Unsuccessful commit offset");
             Leave();
         }
     }
 
     void Leave() {
+        LOG_I("Leave");
         Send(Worker, new TEvents::TEvGone());
         PassAway();
     }
diff --git a/ydb/core/tx/replication/service/topic_reader_ut.cpp b/ydb/core/tx/replication/service/topic_reader_ut.cpp
new file mode 100644
index 000000000000..ee77fcfb8677
--- /dev/null
+++ b/ydb/core/tx/replication/service/topic_reader_ut.cpp
@@ -0,0 +1,116 @@
+#include "topic_reader.h"
+#include "worker.h"
+
+#include <ydb/core/tx/replication/ut_helpers/test_env.h>
+#include <ydb/core/tx/replication/ut_helpers/write_topic.h>
+#include <ydb/core/tx/replication/ydb_proxy/ydb_proxy.h>
+#include <ydb/public/sdk/cpp/client/ydb_topic/topic.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+namespace NKikimr::NReplication::NService {
+
+Y_UNIT_TEST_SUITE(RemoteTopicReader) {
+    template <typename Env>
+    TActorId CreateReader(Env& env, const NYdb::NTopic::TReadSessionSettings& settings) {
+        auto reader = env.GetRuntime().Register(CreateRemoteTopicReader(env.GetYdbProxy(), settings));
+        env.SendAsync(reader, new TEvWorker::TEvHandshake());
+
+        while (true) {
+            TAutoPtr<IEventHandle> handle;
+            auto result = env.GetRuntime().template GrabEdgeEventsRethrow<TEvWorker::TEvHandshake, TEvents::TEvGone>(handle);
+            if (handle->Sender != reader) {
+                continue;
+            }
+
+            if (auto* ev = std::get<TEvWorker::TEvHandshake*>(result)) {
+                return reader;
+            } else if (std::get<TEvents::TEvGone*>(result)) {
+                reader = env.GetRuntime().Register(CreateRemoteTopicReader(env.GetYdbProxy(), settings));
+                env.SendAsync(reader, new TEvWorker::TEvHandshake());
+                continue;
+            } else {
+                UNIT_ASSERT("Unexpected event");
+            }
+        }
+    }
+
+    template <typename Env>
+    auto ReadData(Env& env, TActorId& reader, const NYdb::NTopic::TReadSessionSettings& settings) {
+        reader = CreateReader(env, settings);
+        env.SendAsync(reader, new TEvWorker::TEvPoll());
+
+        while (true) {
+            TAutoPtr<IEventHandle> handle;
+            auto result = env.GetRuntime().template GrabEdgeEventsRethrow<TEvWorker::TEvData, TEvents::TEvGone>(handle);
+            if (handle->Sender != reader) {
+                continue;
+            }
+
+            if (auto* ev = std::get<TEvWorker::TEvData*>(result)) {
+                return ev->Records;
+            } else if (std::get<TEvents::TEvGone*>(result)) {
+                reader = CreateReader(env, settings);
+                env.SendAsync(reader, new TEvWorker::TEvPoll());
+                continue;
+            }
+        }
+    }
+
+    Y_UNIT_TEST(ReadTopic) {
+        TEnv env;
+        env.GetRuntime().SetLogPriority(NKikimrServices::REPLICATION_SERVICE, NLog::PRI_DEBUG);
+
+        // create topic
+        {
+            auto settings = NYdb::NTopic::TCreateTopicSettings()
+                .BeginAddConsumer()
+                    .ConsumerName("consumer")
+                .EndAddConsumer();
+
+            auto ev = env.Send<TEvYdbProxy::TEvCreateTopicResponse>(
+                new TEvYdbProxy::TEvCreateTopicRequest("/Root/topic", settings));
+            UNIT_ASSERT(ev);
+            UNIT_ASSERT(ev->Get()->Result.IsSuccess());
+        }
+
+        auto settings = NYdb::NTopic::TReadSessionSettings()
+            .ConsumerName("consumer")
+            .AppendTopics(NYdb::NTopic::TTopicReadSettings()
+                .Path("/Root/topic")
+                .AppendPartitionIds(0)
+            );
+
+        TActorId reader;
+
+        // write, create reader & read
+        UNIT_ASSERT(WriteTopic(env, "/Root/topic", "message-1"));
+        {
+            auto records = ReadData(env, reader, settings);
+            UNIT_ASSERT_VALUES_EQUAL(records.size(), 1);
+
+            const auto& record = records.at(0);
+            UNIT_ASSERT_VALUES_EQUAL(record.Offset, 0);
+            UNIT_ASSERT_VALUES_EQUAL(record.Data, "message-1");
+        }
+
+        // trigger commit, write new data & kill reader
+        {
+            env.SendAsync(reader, new TEvWorker::TEvPoll());
+            UNIT_ASSERT(WriteTopic(env, "/Root/topic", "message-2"));
+            env.SendAsync(reader, new TEvents::TEvPoison());
+        }
+
+        // create reader again & read
+        {
+            auto records = ReadData(env, reader, settings);
+            UNIT_ASSERT_VALUES_EQUAL(records.size(), 1);
+
+            const auto& record = records.at(0);
+            UNIT_ASSERT_VALUES_EQUAL(record.Offset, 1);
+            UNIT_ASSERT_VALUES_EQUAL(record.Data, "message-2");
+        }
+    }
+}
+
+}
diff --git a/ydb/core/tx/replication/service/ut/ya.make b/ydb/core/tx/replication/service/ut/ya.make
new file mode 100644
index 000000000000..5dd6457d659e
--- /dev/null
+++ b/ydb/core/tx/replication/service/ut/ya.make
@@ -0,0 +1,3 @@
+RECURSE(
+    ../ut_topic_reader
+)
diff --git a/ydb/core/tx/replication/service/ut_topic_reader/ya.make b/ydb/core/tx/replication/service/ut_topic_reader/ya.make
new file mode 100644
index 000000000000..0f3385089f2f
--- /dev/null
+++ b/ydb/core/tx/replication/service/ut_topic_reader/ya.make
@@ -0,0 +1,22 @@
+UNITTEST_FOR(ydb/core/tx/replication/service)
+
+FORK_SUBTESTS()
+
+SIZE(MEDIUM)
+
+TIMEOUT(600)
+
+PEERDIR(
+    ydb/core/tx/replication/ut_helpers
+    ydb/core/tx/replication/ydb_proxy
+    ydb/public/sdk/cpp/client/ydb_topic
+    library/cpp/testing/unittest
+)
+
+SRCS(
+    topic_reader_ut.cpp
+)
+
+YQL_LAST_ABI_VERSION()
+
+END()
diff --git a/ydb/core/tx/replication/service/ya.make b/ydb/core/tx/replication/service/ya.make
index 41b6abd8ffe7..f44bf75d1c04 100644
--- a/ydb/core/tx/replication/service/ya.make
+++ b/ydb/core/tx/replication/service/ya.make
@@ -10,6 +10,7 @@ PEERDIR(
     ydb/core/io_formats/cell_maker
     ydb/core/tx/replication/ydb_proxy
     ydb/library/actors/core
+    ydb/library/services
     library/cpp/json
 )
 
diff --git a/ydb/core/tx/replication/ut/ya.make b/ydb/core/tx/replication/ut/ya.make
index 5111ece9394a..bfbed1f09eac 100644
--- a/ydb/core/tx/replication/ut/ya.make
+++ b/ydb/core/tx/replication/ut/ya.make
@@ -1,3 +1,4 @@
 RECURSE(
+    ../service/ut
     ../ydb_proxy/ut
 )
diff --git a/ydb/core/tx/replication/ut_helpers/test_env.h b/ydb/core/tx/replication/ut_helpers/test_env.h
index d4ca801b454a..182d95d6a4d2 100644
--- a/ydb/core/tx/replication/ut_helpers/test_env.h
+++ b/ydb/core/tx/replication/ut_helpers/test_env.h
@@ -2,6 +2,7 @@
 #include <ydb/core/protos/replication.pb.h>
 #include <ydb/core/testlib/test_client.h>
 #include <ydb/core/tx/schemeshard/schemeshard.h>
+#include <ydb/core/tx/replication/ydb_proxy/ydb_proxy.h>
 
 #include <library/cpp/testing/unittest/registar.h>
 
@@ -134,6 +135,10 @@ class TEnv {
         return Sender;
     }
 
+    const TActorId& GetYdbProxy() const {
+        return YdbProxy;
+    }
+
 private:
     TPortManager PortManager;
     Tests::TServerSettings Settings;
diff --git a/ydb/core/tx/replication/ut_helpers/write_topic.h b/ydb/core/tx/replication/ut_helpers/write_topic.h
new file mode 100644
index 000000000000..3fc8955d7b77
--- /dev/null
+++ b/ydb/core/tx/replication/ut_helpers/write_topic.h
@@ -0,0 +1,24 @@
+#include <ydb/public/sdk/cpp/client/ydb_topic/topic.h>
+
+namespace NKikimr::NReplication {
+
+template <typename Env>
+bool WriteTopic(const Env& env, const TString& topicPath, const TString& data) {
+    NYdb::NTopic::TTopicClient client(env.GetDriver(), NYdb::NTopic::TTopicClientSettings()
+        .DiscoveryEndpoint(env.GetEndpoint())
+        .Database(env.GetDatabase())
+    );
+
+    auto session = client.CreateSimpleBlockingWriteSession(NYdb::NTopic::TWriteSessionSettings()
+        .Path(topicPath)
+        .ProducerId("producer")
+        .MessageGroupId("producer")
+    );
+
+    const auto result = session->Write(data);
+    session->Close();
+
+    return result;
+}
+
+}
diff --git a/ydb/core/tx/replication/ut_helpers/ya.make b/ydb/core/tx/replication/ut_helpers/ya.make
index 43d2e7ab0264..d57bf0301616 100644
--- a/ydb/core/tx/replication/ut_helpers/ya.make
+++ b/ydb/core/tx/replication/ut_helpers/ya.make
@@ -4,11 +4,14 @@ PEERDIR(
     ydb/core/base
     ydb/core/protos
     ydb/core/testlib/default
+    ydb/core/tx/replication/ydb_proxy
+    ydb/public/sdk/cpp/client/ydb_topic
     library/cpp/testing/unittest
 )
 
 SRCS(
     test_env.h
+    write_topic.h
 )
 
 YQL_LAST_ABI_VERSION()
diff --git a/ydb/core/tx/replication/ydb_proxy/ydb_proxy.cpp b/ydb/core/tx/replication/ydb_proxy/ydb_proxy.cpp
index 00de5a1f01c2..3c6b36ea0a25 100644
--- a/ydb/core/tx/replication/ydb_proxy/ydb_proxy.cpp
+++ b/ydb/core/tx/replication/ydb_proxy/ydb_proxy.cpp
@@ -10,6 +10,7 @@
 #include <ydb/core/base/appdata.h>
 
 #include <util/generic/hash_set.h>
+#include <util/string/join.h>
 
 #include <memory>
 #include <mutex>
@@ -22,6 +23,20 @@ using namespace NYdb::NScheme;
 using namespace NYdb::NTable;
 using namespace NYdb::NTopic;
 
+void TEvYdbProxy::TReadTopicResult::TMessage::Out(IOutputStream& out) const {
+    out << "{"
+        << " Offset: " << Offset
+        << " Data: " << Data.size() << "b"
+        << " Codec: " << Codec
+    << " }";
+}
+
+void TEvYdbProxy::TReadTopicResult::Out(IOutputStream& out) const {
+    out << "{"
+        << " Messages [" << JoinSeq(",", Messages) << "]"
+    << " }";
+}
+
 template <typename TDerived>
 class TBaseProxyActor: public TActor<TDerived> {
     class TRequest;
@@ -465,3 +480,11 @@ IActor* CreateYdbProxy(const TString& endpoint, const TString& database, const T
 }
 
 }
+
+Y_DECLARE_OUT_SPEC(, NKikimr::NReplication::TEvYdbProxy::TReadTopicResult::TMessage, o, x) {
+    return x.Out(o);
+}
+
+Y_DECLARE_OUT_SPEC(, NKikimr::NReplication::TEvYdbProxy::TReadTopicResult, o, x) {
+    return x.Out(o);
+}
diff --git a/ydb/core/tx/replication/ydb_proxy/ydb_proxy.h b/ydb/core/tx/replication/ydb_proxy/ydb_proxy.h
index 2afc4f63ef32..ff384052b396 100644
--- a/ydb/core/tx/replication/ydb_proxy/ydb_proxy.h
+++ b/ydb/core/tx/replication/ydb_proxy/ydb_proxy.h
@@ -83,6 +83,18 @@ struct TEvYdbProxy {
         using TBase = TGenericRequest<TDerived, EventType, void>;
     };
 
+    template <typename T>
+    class THasOutFunc {
+        template <typename U>
+        static constexpr std::false_type Detect(...);
+
+        template <typename U, typename = decltype(std::declval<U>().Out(std::declval<IOutputStream&>()))>
+        static constexpr std::true_type Detect(int);
+
+    public:
+        static constexpr bool Value = decltype(Detect<T>(0))::value;
+    };
+
     template <typename TDerived, ui32 EventType, typename T>
     struct TGenericResponse: public TEventLocal<TDerived, EventType> {
         using TResult = T;
@@ -96,6 +108,14 @@ struct TEvYdbProxy {
         {
         }
 
+        TString ToString() const override {
+            auto ret = TStringBuilder() << this->ToStringHeader();
+            if constexpr (THasOutFunc<TResult>::Value) {
+                ret << " { Result: " << Result << " }";
+            }
+            return ret;
+        }
+
         using TBase = TGenericResponse<TDerived, EventType, T>;
     };
 
@@ -126,6 +146,7 @@ struct TEvYdbProxy {
             const TString& GetData() const { return Data; }
             TString& GetData() { return Data; }
             ECodec GetCodec() const { return Codec; }
+            void Out(IOutputStream& out) const;
 
         private:
             ui64 Offset;
@@ -146,6 +167,8 @@ struct TEvYdbProxy {
             }
         }
 
+        void Out(IOutputStream& out) const;
+
         TVector<TMessage> Messages;
     };
 
diff --git a/ydb/core/tx/replication/ydb_proxy/ydb_proxy_ut.cpp b/ydb/core/tx/replication/ydb_proxy/ydb_proxy_ut.cpp
index 1fc3b8d97342..2a9161efd1dc 100644
--- a/ydb/core/tx/replication/ydb_proxy/ydb_proxy_ut.cpp
+++ b/ydb/core/tx/replication/ydb_proxy/ydb_proxy_ut.cpp
@@ -1,6 +1,7 @@
 #include "ydb_proxy.h"
 
 #include <ydb/core/tx/replication/ut_helpers/test_env.h>
+#include <ydb/core/tx/replication/ut_helpers/write_topic.h>
 #include <ydb/public/sdk/cpp/client/ydb_topic/topic.h>
 
 #include <library/cpp/testing/unittest/registar.h>
@@ -580,25 +581,6 @@ Y_UNIT_TEST_SUITE(YdbProxyTests) {
         return ev->Get()->Result;
     }
 
-    template <typename Env>
-    bool WriteTopic(const Env& env, const TString& topicPath, const TString& data) {
-        NYdb::NTopic::TTopicClient client(env.GetDriver(), NYdb::NTopic::TTopicClientSettings()
-            .DiscoveryEndpoint(env.GetEndpoint())
-            .Database(env.GetDatabase())
-        );
-
-        auto session = client.CreateSimpleBlockingWriteSession(NYdb::NTopic::TWriteSessionSettings()
-            .Path(topicPath)
-            .ProducerId("producer")
-            .MessageGroupId("producer")
-        );
-
-        const auto result = session->Write(data);
-        session->Close();
-
-        return result;
-    }
-
     template <typename Env>
     TEvYdbProxy::TReadTopicResult ReadTopicData(Env& env, TActorId& reader, const TString& topicPath) {
         env.SendAsync(reader, new TEvYdbProxy::TEvReadTopicRequest());
diff --git a/ydb/library/services/services.proto b/ydb/library/services/services.proto
index d9049aa6c895..788bde3f98e0 100644
--- a/ydb/library/services/services.proto
+++ b/ydb/library/services/services.proto
@@ -347,6 +347,7 @@ enum EServiceKikimr {
 
     // Replication
     REPLICATION_CONTROLLER = 1200;
+    REPLICATION_SERVICE = 1201;
 
     // Blob depot
     BLOB_DEPOT = 1300;