diff --git a/core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkConstants.kt b/core/network/src/main/java/ru/fincode/tsudesk/core/network/Constants.kt
similarity index 80%
rename from core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkConstants.kt
rename to core/network/src/main/java/ru/fincode/tsudesk/core/network/Constants.kt
index a20299b..2816251 100644
--- a/core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkConstants.kt
+++ b/core/network/src/main/java/ru/fincode/tsudesk/core/network/Constants.kt
@@ -1,5 +1,5 @@
 package ru.fincode.tsudesk.core.network
 
-object NetworkConstants {
+object Constants {
     const val BASE_URL = "https://tulsu.ru/schedule/queries/"
 }
\ No newline at end of file
diff --git a/core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkCall.kt b/core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkCall.kt
index d249f44..fe14753 100644
--- a/core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkCall.kt
+++ b/core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkCall.kt
@@ -1,24 +1,58 @@
 package ru.fincode.tsudesk.core.network
 
 import retrofit2.HttpException
+import retrofit2.Response
 import ru.fincode.tsudesk.core.network.model.NetworkError
+import ru.fincode.tsudesk.core.network.model.NetworkMeta
 import ru.fincode.tsudesk.core.network.model.NetworkResult
+import ru.fincode.tsudesk.core.network.model.NetworkResult.Success
 import java.io.IOException
 import java.net.SocketTimeoutException
 
-suspend inline fun <T> safeApiCall(
-    crossinline block: suspend () -> T
+suspend inline fun <T> apiCall(
+    crossinline block: suspend () -> Response<T>
 ): NetworkResult<T> {
+    val startedAt = System.currentTimeMillis()
+
     return try {
-        NetworkResult.Success(block())
+        val response = block()
+        val finishedAt = System.currentTimeMillis()
+
+        val raw = response.raw()
+        val meta = NetworkMeta(
+            startedAtMillis = startedAt,
+            finishedAtMillis = finishedAt,
+            sentAtMillis = raw.sentRequestAtMillis,
+            receivedAtMillis = raw.receivedResponseAtMillis
+        )
+
+        if (response.isSuccessful) {
+            val body = response.body()
+            if (body != null) {
+                Success(data = body, meta = meta)
+            } else {
+                NetworkResult.Error(
+                    NetworkError.Unknown(
+                        throwable = NullPointerException("Response body is null"),
+                        meta = meta
+                    )
+                )
+            }
+        } else {
+            NetworkResult.Error(NetworkError.Http(code = response.code(), meta = meta))
+        }
     } catch (t: Throwable) {
-        NetworkResult.Error(t.toNetworkError())
+        val meta = NetworkMeta(
+            startedAtMillis = startedAt,
+            finishedAtMillis = System.currentTimeMillis()
+        )
+        NetworkResult.Error(t.toNetworkError(meta))
     }
 }
 
-fun Throwable.toNetworkError(): NetworkError = when (this) {
-    is SocketTimeoutException -> NetworkError.Timeout
-    is IOException -> NetworkError.NoInternet
-    is HttpException -> NetworkError.Http(code())
-    else -> NetworkError.Unknown(this)
+fun Throwable.toNetworkError(meta: NetworkMeta): NetworkError = when (this) {
+    is SocketTimeoutException -> NetworkError.Timeout(meta)
+    is IOException -> NetworkError.NoInternet(meta)
+    is HttpException -> NetworkError.Http(code(), meta)
+    else -> NetworkError.Unknown(this, meta)
 }
diff --git a/core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkModule.kt b/core/network/src/main/java/ru/fincode/tsudesk/core/network/di/OkHttpModule.kt
similarity index 58%
rename from core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkModule.kt
rename to core/network/src/main/java/ru/fincode/tsudesk/core/network/di/OkHttpModule.kt
index d3ad925..76f4936 100644
--- a/core/network/src/main/java/ru/fincode/tsudesk/core/network/NetworkModule.kt
+++ b/core/network/src/main/java/ru/fincode/tsudesk/core/network/di/OkHttpModule.kt
@@ -1,40 +1,30 @@
-package ru.fincode.tsudesk.core.network
+package ru.fincode.tsudesk.core.network.di
 
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
 import okhttp3.OkHttpClient
-import retrofit2.Retrofit
+import ru.fincode.tsudesk.core.network.interceptor.DebugInterceptor
 import java.util.concurrent.TimeUnit
 import javax.inject.Singleton
-import okhttp3.logging.HttpLoggingInterceptor
-import ru.fincode.tsudesk.core.network.interceptor.DebugInterceptor
 
 @Module
 @InstallIn(SingletonComponent::class)
-object NetworkModule {
+object OkHttpModule {
 
     private const val TIMEOUT = 30L
-    val logging = HttpLoggingInterceptor().apply {
-        level = HttpLoggingInterceptor.Level.BODY
-    }
 
     @Provides
     @Singleton
-    fun provideOkHttpClient(): OkHttpClient =
-        OkHttpClient.Builder()
+    fun provideOkHttpClient(
+    ): OkHttpClient {
+        return OkHttpClient.Builder()
             .connectTimeout(TIMEOUT, TimeUnit.SECONDS)
             .readTimeout(TIMEOUT, TimeUnit.SECONDS)
             .writeTimeout(TIMEOUT, TimeUnit.SECONDS)
             .retryOnConnectionFailure(true)
             .addInterceptor(DebugInterceptor())
             .build()
-
-    @Provides
-    fun provideRetrofit(
-        provider: RetrofitProvider,
-        client: OkHttpClient
-    ): Retrofit = provider.process(NetworkConstants.BASE_URL, client)
-
-}
\ No newline at end of file
+    }
+}
diff --git a/core/network/src/main/java/ru/fincode/tsudesk/core/network/di/RetrofitModule.kt b/core/network/src/main/java/ru/fincode/tsudesk/core/network/di/RetrofitModule.kt
new file mode 100644
index 0000000..d5056fa
--- /dev/null
+++ b/core/network/src/main/java/ru/fincode/tsudesk/core/network/di/RetrofitModule.kt
@@ -0,0 +1,24 @@
+package ru.fincode.tsudesk.core.network.di
+
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import okhttp3.OkHttpClient
+import retrofit2.Retrofit
+import ru.fincode.tsudesk.core.network.Constants
+import ru.fincode.tsudesk.core.network.RetrofitProvider
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object RetrofitModule {
+
+    @Provides
+    @Singleton
+    fun provideRetrofit(
+        provider: RetrofitProvider,
+        client: OkHttpClient
+    ): Retrofit =
+        provider.process(Constants.BASE_URL, client)
+}
diff --git a/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkError.kt b/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkError.kt
index 5aead0a..951196b 100644
--- a/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkError.kt
+++ b/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkError.kt
@@ -1,8 +1,17 @@
 package ru.fincode.tsudesk.core.network.model
 
-sealed class NetworkError {
-    object NoInternet : NetworkError()
-    object Timeout : NetworkError()
-    data class Http(val code: Int) : NetworkError()
-    data class Unknown(val throwable: Throwable) : NetworkError()
-}
\ No newline at end of file
+sealed class NetworkError(open val meta: NetworkMeta) {
+
+    data class NoInternet(override val meta: NetworkMeta) : NetworkError(meta)
+    data class Timeout(override val meta: NetworkMeta) : NetworkError(meta)
+
+    data class Http(
+        val code: Int,
+        override val meta: NetworkMeta
+    ) : NetworkError(meta)
+
+    data class Unknown(
+        val throwable: Throwable,
+        override val meta: NetworkMeta
+    ) : NetworkError(meta)
+}
diff --git a/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkMeta.kt b/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkMeta.kt
new file mode 100644
index 0000000..7d34680
--- /dev/null
+++ b/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkMeta.kt
@@ -0,0 +1,8 @@
+package ru.fincode.tsudesk.core.network.model
+
+data class NetworkMeta(
+    val startedAtMillis: Long,
+    val finishedAtMillis: Long,
+    val sentAtMillis: Long? = null,
+    val receivedAtMillis: Long? = null
+)
diff --git a/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkResult.kt b/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkResult.kt
index 7e77fbf..ffb3d4b 100644
--- a/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkResult.kt
+++ b/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkResult.kt
@@ -1,6 +1,6 @@
 package ru.fincode.tsudesk.core.network.model
 
 sealed class NetworkResult<out T> {
-    data class Success<T>(val data: T) : NetworkResult<T>()
+    data class Success<T>(val data: T, val meta: NetworkMeta) : NetworkResult<T>()
     data class Error(val error: NetworkError) : NetworkResult<Nothing>()
-}
\ No newline at end of file
+}
diff --git a/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkResultExt.kt b/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkResultExt.kt
index 69d4e04..bbeb3bb 100644
--- a/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkResultExt.kt
+++ b/core/network/src/main/java/ru/fincode/tsudesk/core/network/model/NetworkResultExt.kt
@@ -1,8 +1,14 @@
 package ru.fincode.tsudesk.core.network.model
 
 inline fun <T, R> NetworkResult<T>.map(
-    transform: (T) -> R
-): NetworkResult<R> = when (this) {
-    is NetworkResult.Success -> NetworkResult.Success(transform(data))
-    is NetworkResult.Error -> this
-}
+    transform: (T, NetworkMeta) -> R
+): NetworkResult<R> =
+    when (val source = this) {
+
+        is NetworkResult.Success -> NetworkResult.Success(
+            data = transform(source.data, source.meta),
+            meta = source.meta
+        )
+
+        is NetworkResult.Error -> NetworkResult.Error(source.error)
+    }
diff --git a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/datasource/ScheduleRemoteDataSource.kt b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/datasource/ScheduleRemoteDataSource.kt
index a90ecda..4c7b75b 100644
--- a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/datasource/ScheduleRemoteDataSource.kt
+++ b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/datasource/ScheduleRemoteDataSource.kt
@@ -1,19 +1,9 @@
 package ru.fincode.tsudesk.feature.schedule.data.datasource
 
 import ru.fincode.tsudesk.core.network.model.NetworkResult
-import ru.fincode.tsudesk.core.network.safeApiCall
-import ru.fincode.tsudesk.feature.schedule.data.remote.ScheduleApi
-import ru.fincode.tsudesk.feature.schedule.data.remote.model.LessonDto.ScheduleSearchField.GROUP_P
-import ru.fincode.tsudesk.feature.schedule.data.remote.model.LessonDto.ScheduleSearchField.PREP
 import ru.fincode.tsudesk.feature.schedule.data.remote.model.ScheduleDto
-import javax.inject.Inject
 
-class ScheduleRemoteDataSource @Inject constructor(
-    private val api: ScheduleApi
-) {
-    suspend fun loadScheduleByGroup(number: String): NetworkResult<ScheduleDto> =
-        safeApiCall { api.getSchedule(GROUP_P, number) }
-
-    suspend fun loadScheduleByTeacher(name: String): NetworkResult<ScheduleDto> =
-        safeApiCall { api.getSchedule(PREP, name) }
+interface ScheduleRemoteDataSource {
+    suspend fun loadScheduleByGroup(number: String): NetworkResult<ScheduleDto>
+    suspend fun loadScheduleByTeacher(name: String): NetworkResult<ScheduleDto>
 }
diff --git a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/datasource/ScheduleRemoteDataSourceImpl.kt b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/datasource/ScheduleRemoteDataSourceImpl.kt
deleted file mode 100644
index 2d56f2f..0000000
--- a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/datasource/ScheduleRemoteDataSourceImpl.kt
+++ /dev/null
@@ -1,21 +0,0 @@
-package ru.fincode.tsudesk.feature.schedule.data.datasource
-
-import ru.fincode.tsudesk.core.network.model.NetworkResult
-import ru.fincode.tsudesk.core.network.model.map
-import ru.fincode.tsudesk.feature.schedule.data.mapper.ScheduleDtoToDomainMapper
-import ru.fincode.tsudesk.feature.schedule.domain.model.ScheduleEntity
-import ru.fincode.tsudesk.feature.schedule.domain.repository.ScheduleRepository
-import javax.inject.Inject
-
-class ScheduleRemoteDataSourceImpl @Inject constructor(
-    private val remote: ScheduleRemoteDataSource,
-    private val mapper: ScheduleDtoToDomainMapper
-) : ScheduleRepository {
-
-    override suspend fun loadScheduleByGroup(number: String): NetworkResult<ScheduleEntity> =
-        remote.loadScheduleByGroup(number).map(mapper::invoke)
-
-    override suspend fun loadScheduleByTeacher(name: String): NetworkResult<ScheduleEntity> =
-        remote.loadScheduleByTeacher(name).map(mapper::invoke)
-
-}
diff --git a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/mapper/ScheduleDtoToDomainMapper.kt b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/mapper/ScheduleDtoToDomainMapper.kt
index 2515da6..ea18a30 100644
--- a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/mapper/ScheduleDtoToDomainMapper.kt
+++ b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/mapper/ScheduleDtoToDomainMapper.kt
@@ -1,5 +1,6 @@
 package ru.fincode.tsudesk.feature.schedule.data.mapper
 
+import ru.fincode.tsudesk.core.network.model.NetworkMeta
 import ru.fincode.tsudesk.feature.schedule.data.remote.model.LessonDto
 import ru.fincode.tsudesk.feature.schedule.data.remote.model.ScheduleDto
 import ru.fincode.tsudesk.feature.schedule.domain.model.LessonEntity
@@ -8,8 +9,11 @@ import javax.inject.Inject
 
 class ScheduleDtoToDomainMapper @Inject constructor() {
 
-    operator fun invoke(dto: ScheduleDto): ScheduleEntity =
-        ScheduleEntity(lessons = dto.map(::mapLesson))
+    operator fun invoke(dto: ScheduleDto, meta: NetworkMeta): ScheduleEntity =
+        ScheduleEntity(
+            lessons = dto.map(::mapLesson),
+            timestamp = meta.receivedAtMillis ?: meta.finishedAtMillis
+        )
 
     private fun mapLesson(item: LessonDto): LessonEntity =
         LessonEntity(
@@ -22,4 +26,4 @@ class ScheduleDtoToDomainMapper @Inject constructor() {
             groupId = item.groups.firstOrNull()?.groupCode.orEmpty(),
             type = item.type.trim()
         )
-}
+}
\ No newline at end of file
diff --git a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleApi.kt b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleApi.kt
index b775779..4ba0669 100644
--- a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleApi.kt
+++ b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleApi.kt
@@ -1,27 +1,18 @@
 package ru.fincode.tsudesk.feature.schedule.data.remote
 
+import retrofit2.Response
 import retrofit2.http.GET
 import retrofit2.http.Query
-import ru.fincode.tsudesk.feature.schedule.data.remote.model.LessonDto
-import ru.fincode.tsudesk.feature.schedule.data.remote.model.LessonDto.*
+import ru.fincode.tsudesk.feature.schedule.data.remote.ScheduleApiContract.Path.GET_SCHEDULE_METHOD
+import ru.fincode.tsudesk.feature.schedule.data.remote.ScheduleApiContract.Query.SEARCH_FIELD
+import ru.fincode.tsudesk.feature.schedule.data.remote.ScheduleApiContract.Query.SEARCH_VALUE
 import ru.fincode.tsudesk.feature.schedule.data.remote.model.ScheduleDto
 
 interface ScheduleApi {
 
-    /**
-     * Расписание по номеру группы.
-     * Пример: search_field=GROUP_P&search_value=220631
-     * https://tulsu.ru/schedule/queries/GetSchedule.php?search_field=GROUP_P&search_value=220631
-     *
-     *
-     * Расписание по ФИО преподавателя (строкой).
-     * Пример: search_field=PREP&search_value=Набродова Ирина Николаевна
-     *
-     * Важно: Retrofit сам URL-энкодит параметр search_value
-     * https://tulsu.ru/schedule/queries/GetDates.php?search_value=%D0%9D%D0%B0%D0%B1%D1%80%D0%BE%D0%B4%D0%BE%D0%B2%D0%B0%20%D0%98%D1%80%D0%B8%D0%BD%D0%B0%20%D0%9D%D0%B8%D0%BA%D0%BE%D0%BB%D0%B0%D0%B5%D0%B2%D0%BD%D0%B0
-     */
-    @GET("GetSchedule.php")
+    @GET(GET_SCHEDULE_METHOD)
     suspend fun getSchedule(
-        @Query("search_field") searchField: String, @Query("search_value") searchValue: String
-    ): ScheduleDto
+        @Query(SEARCH_FIELD) searchField: String,
+        @Query(SEARCH_VALUE) searchValue: String
+    ): Response<ScheduleDto>
 }
diff --git a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleApiContract.kt b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleApiContract.kt
new file mode 100644
index 0000000..295885e
--- /dev/null
+++ b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleApiContract.kt
@@ -0,0 +1,16 @@
+package ru.fincode.tsudesk.feature.schedule.data.remote
+
+object ScheduleApiContract {
+
+    object Path {
+        const val GET_SCHEDULE_METHOD = "GetSchedule.php"
+    }
+
+    object Query {
+        const val SEARCH_FIELD = "search_field"
+        const val SEARCH_VALUE = "search_value"
+
+        const val FIELD_GROUP = "GROUP_P"
+        const val FIELD_TEACHER = "PREP"
+    }
+}
diff --git a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleRemoteDataSourceImpl.kt b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleRemoteDataSourceImpl.kt
new file mode 100644
index 0000000..1f435b9
--- /dev/null
+++ b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/data/remote/ScheduleRemoteDataSourceImpl.kt
@@ -0,0 +1,28 @@
+package ru.fincode.tsudesk.feature.schedule.data.remote
+
+import ru.fincode.tsudesk.core.network.model.NetworkResult
+import ru.fincode.tsudesk.core.network.apiCall
+import ru.fincode.tsudesk.feature.schedule.data.datasource.ScheduleRemoteDataSource
+import ru.fincode.tsudesk.feature.schedule.data.remote.model.ScheduleDto
+import javax.inject.Inject
+
+class ScheduleRemoteDataSourceImpl @Inject constructor(
+    private val api: ScheduleApi
+) : ScheduleRemoteDataSource {
+
+    override suspend fun loadScheduleByGroup(number: String): NetworkResult<ScheduleDto> =
+        apiCall {
+            api.getSchedule(
+                searchField = ScheduleApiContract.Query.FIELD_GROUP,
+                searchValue = number
+            )
+        }
+
+    override suspend fun loadScheduleByTeacher(name: String): NetworkResult<ScheduleDto> =
+        apiCall {
+            api.getSchedule(
+                searchField = ScheduleApiContract.Query.FIELD_TEACHER,
+                searchValue = name
+            )
+        }
+}
\ No newline at end of file
diff --git a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/di/ScheduleRemoteDataSourceModule.kt b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/di/ScheduleRemoteDataSourceModule.kt
new file mode 100644
index 0000000..65204ed
--- /dev/null
+++ b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/di/ScheduleRemoteDataSourceModule.kt
@@ -0,0 +1,20 @@
+package ru.fincode.tsudesk.feature.schedule.di
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import ru.fincode.tsudesk.feature.schedule.data.datasource.ScheduleRemoteDataSource
+import ru.fincode.tsudesk.feature.schedule.data.remote.ScheduleRemoteDataSourceImpl
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class ScheduleRemoteDataSourceModule {
+
+    @Binds
+    @Singleton
+    abstract fun bindScheduleRemoteDataSource(
+        impl: ScheduleRemoteDataSourceImpl
+    ): ScheduleRemoteDataSource
+}
diff --git a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/domain/model/ScheduleEntity.kt b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/domain/model/ScheduleEntity.kt
index 0f47aa7..7e125bd 100644
--- a/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/domain/model/ScheduleEntity.kt
+++ b/feature/schedule/src/main/java/ru/fincode/tsudesk/feature/schedule/domain/model/ScheduleEntity.kt
@@ -1,7 +1,8 @@
 package ru.fincode.tsudesk.feature.schedule.domain.model
 
 data class ScheduleEntity(
-    val lessons: List<LessonEntity>
+    val lessons: List<LessonEntity>,
+    val timestamp: Long
 )