diff --git a/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/common/Response.kt b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/common/Response.kt
new file mode 100644
index 0000000..fa07ba1
--- /dev/null
+++ b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/common/Response.kt
@@ -0,0 +1,6 @@
+package com.github.alice.ktx.api.common
+
+sealed interface Response<T>{
+    data class Failed<T>(val message: String): Response<T>
+    data class Success<T>(val data: T): Response<T>
+}
\ No newline at end of file
diff --git a/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/common/extensions/ResponseExtensions.kt b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/common/extensions/ResponseExtensions.kt
new file mode 100644
index 0000000..deb078e
--- /dev/null
+++ b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/common/extensions/ResponseExtensions.kt
@@ -0,0 +1,13 @@
+package com.github.alice.ktx.api.common.extensions
+
+import com.github.alice.ktx.api.common.Response
+import com.github.alice.ktx.api.dialog.yandex.models.ErrorBody
+import io.ktor.client.call.*
+import io.ktor.client.statement.*
+
+suspend inline fun <reified T> HttpResponse.response(): Response<T> {
+    return if(status.value in 200..299)
+        Response.Success(this.body())
+    else
+        Response.Failed(this.body<ErrorBody>().message)
+}
\ No newline at end of file
diff --git a/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/DialogApi.kt b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/DialogApi.kt
index 7754513..4f874bd 100644
--- a/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/DialogApi.kt
+++ b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/DialogApi.kt
@@ -1,14 +1,15 @@
 package com.github.alice.ktx.api.dialog
 
+import com.github.alice.ktx.api.common.Response
 import com.github.alice.ktx.api.dialog.yandex.models.image.response.ImageUpload
 import com.github.alice.ktx.api.dialog.yandex.models.image.response.Images
 import com.github.alice.ktx.api.dialog.yandex.models.status.Status
 import java.io.File
 
 interface DialogApi {
-    suspend fun getStatus(): Status
-    suspend fun uploadImage(url: String): ImageUpload
-    suspend fun uploadImage(file: File): ImageUpload
-    suspend fun getAllImages(): Images
-    suspend fun deleteImage(id: String): Boolean
+    suspend fun getStatus(): Response<Status>
+    suspend fun uploadImage(url: String): Response<ImageUpload>
+    suspend fun uploadImage(file: File): Response<ImageUpload>
+    suspend fun getAllImages(): Response<Images>
+    suspend fun deleteImage(id: String): Response<Unit>
 }
\ No newline at end of file
diff --git a/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/yandex/impl/KtorYandexDialogApi.kt b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/yandex/impl/KtorYandexDialogApi.kt
index 2d063eb..eb07f6a 100644
--- a/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/yandex/impl/KtorYandexDialogApi.kt
+++ b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/yandex/impl/KtorYandexDialogApi.kt
@@ -1,7 +1,10 @@
 package com.github.alice.ktx.api.dialog.yandex.impl
 
 import com.github.alice.ktx.Skill
+import com.github.alice.ktx.api.common.Response
+import com.github.alice.ktx.api.common.extensions.response
 import com.github.alice.ktx.api.dialog.DialogApi
+import com.github.alice.ktx.api.dialog.yandex.models.ErrorBody
 import com.github.alice.ktx.api.dialog.yandex.models.image.request.ImageUploadUrl
 import com.github.alice.ktx.api.dialog.yandex.models.image.response.DeleteImage
 import com.github.alice.ktx.api.dialog.yandex.models.image.response.ImageUpload
@@ -14,6 +17,7 @@ import io.ktor.client.plugins.*
 import io.ktor.client.plugins.contentnegotiation.*
 import io.ktor.client.request.*
 import io.ktor.client.request.forms.*
+import io.ktor.client.statement.*
 import io.ktor.http.*
 import io.ktor.serialization.kotlinx.json.*
 import io.ktor.util.*
@@ -58,19 +62,19 @@ class KtorYandexDialogApi(
         }
     }
 
-    override suspend fun getStatus(): Status {
-        return client.get("api/v1/status").body()
+    override suspend fun getStatus(): Response<Status> {
+        return client.get("api/v1/status").response()
     }
 
-    override suspend fun uploadImage(url: String): ImageUpload {
+    override suspend fun uploadImage(url: String): Response<ImageUpload> {
         val body = ImageUploadUrl(url = url)
         return client.post("api/v1/skills/$skillId/images") {
             contentType(ContentType.Application.Json)
             setBody(body)
-        }.body()
+        }.response()
     }
 
-    override suspend fun uploadImage(file: File): ImageUpload {
+    override suspend fun uploadImage(file: File): Response<ImageUpload> {
         return client.submitFormWithBinaryData(
             url = "api/v1/skills/$skillId/images",
             formData = formData {
@@ -79,15 +83,14 @@ class KtorYandexDialogApi(
                     append(HttpHeaders.ContentDisposition, "filename=\"${file.name}\"")
                 })
             }
-        ).body()
+        ).response()
     }
 
-    override suspend fun getAllImages(): Images {
-        return client.get("api/v1/skills/$skillId/images").body()
+    override suspend fun getAllImages(): Response<Images> {
+        return client.get("api/v1/skills/$skillId/images").response()
     }
 
-    override suspend fun deleteImage(id: String): Boolean {
-        val response = client.delete("api/v1/skills/$skillId/images/$id")
-        return response.status == HttpStatusCode.OK && response.body<DeleteImage>().result == SUCCESS_MESSAGE
+    override suspend fun deleteImage(id: String): Response<Unit> {
+        return client.delete("api/v1/skills/$skillId/images/$id").response()
     }
 }
\ No newline at end of file
diff --git a/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/yandex/models/ErrorBody.kt b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/yandex/models/ErrorBody.kt
new file mode 100644
index 0000000..5c7c46a
--- /dev/null
+++ b/alice-ktx/src/main/kotlin/com/github/alice/ktx/api/dialog/yandex/models/ErrorBody.kt
@@ -0,0 +1,8 @@
+package com.github.alice.ktx.api.dialog.yandex.models
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class ErrorBody(
+    val message: String
+)
diff --git a/alice-ktx/src/main/kotlin/com/github/alice/ktx/server/impl/KtorWebServer.kt b/alice-ktx/src/main/kotlin/com/github/alice/ktx/server/impl/KtorWebServer.kt
index 315b73f..31fe876 100644
--- a/alice-ktx/src/main/kotlin/com/github/alice/ktx/server/impl/KtorWebServer.kt
+++ b/alice-ktx/src/main/kotlin/com/github/alice/ktx/server/impl/KtorWebServer.kt
@@ -78,7 +78,9 @@ class KtorWebServer(
                     }catch (e: Throwable) {
                         listener.responseFailure(model, e)?.let { response ->
                             call.respond(response)
+                            return@post
                         }
+                        throw e
                     }
                 }
             }
diff --git a/examples/src/main/kotlin/com/github/examples/ImageDialogsApi.kt b/examples/src/main/kotlin/com/github/examples/ImageDialogsApi.kt
index f98477a..223bbc9 100644
--- a/examples/src/main/kotlin/com/github/examples/ImageDialogsApi.kt
+++ b/examples/src/main/kotlin/com/github/examples/ImageDialogsApi.kt
@@ -1,6 +1,7 @@
 package com.github.examples
 
 import com.github.alice.ktx.Dispatcher
+import com.github.alice.ktx.api.common.Response
 import com.github.alice.ktx.api.dialog.yandex.impl.ktorYandexDialogApi
 import com.github.alice.ktx.dispatch
 import com.github.alice.ktx.handlers.message
@@ -27,17 +28,21 @@ fun main() {
             message({ message.request.payload?.keys?.contains("delete_image_id") == true }) {
 
                 val imageId = message.request.payload!!["delete_image_id"].toString()
-                val result = dialogApi?.deleteImage(imageId) ?: false
+                val result = dialogApi?.deleteImage(imageId)
                 response {
-                    text = if(result) "Success" else "Failure"
+                    text = if(result is Response.Success) "Success" else "Failure"
                 }
             }
 
             message({ message.request.originalUtterance == "upload_image_file" }) {
                 val file = File("ktor_icon.png")
-                val result = dialogApi?.uploadImage(file)
+                val response = dialogApi?.uploadImage(file)
                 response {
-                    text = result?.image.toString()
+                    text = when(response) {
+                        is Response.Failed -> response.message
+                        is Response.Success -> response.data.image.toString()
+                        null -> throw NullPointerException("Response was null")
+                    }
                 }
             }
         }
@@ -47,15 +52,20 @@ fun main() {
 private fun Dispatcher.messageCardImages() {
     message({ message.session.new }) {
         val imageResponse = dialogApi?.getAllImages()
-        response {
-            cardItemsList {
-                header = "Images (${imageResponse?.total})"
-                imageResponse?.images?.forEach { image ->
-                    item {
-                        imageId = image.id
-                        mediaButton {
-                            text = "Delete"
-                            payload = mapOf("delete_image_id" to image.id)
+        when(imageResponse) {
+            is Response.Failed, null -> response {
+                text = "Failed"
+            }
+            is Response.Success -> response {
+                cardItemsList {
+                    header = "Images (${imageResponse.data.total})"
+                    imageResponse.data.images.forEach { image ->
+                        item {
+                            imageId = image.id
+                            mediaButton {
+                                text = "Delete"
+                                payload = mapOf("delete_image_id" to image.id)
+                            }
                         }
                     }
                 }