diff --git a/v1/doc.go b/v1/doc.go
new file mode 100644
index 0000000..310839d
--- /dev/null
+++ b/v1/doc.go
@@ -0,0 +1,93 @@
+// Package v1 provides Go API Client implementation for MessageGateway Transport API.
+//
+// You can use v1.New or v1.NewWithClient to initialize API client. github.com/retailcrm/mg-transport-api-client-go/examples
+// package contains some examples on how to use this library properly.
+//
+// Basic usage example:
+//
+//	client := New("https://message-gateway.url", "cb8ccf05e38a47543ad8477d4999be73bff503ea6")
+//	getReplyDeadline := func(after time.Duration) *time.Time {
+//		deadline := time.Now().Add(after)
+//		return &deadline
+//	}
+//
+//	resp, status, err := client.Messages(SendData{
+//		Message: Message{
+//			ExternalID: "uid_1",
+//			Type:       MsgTypeText,
+//			Text:       "Hello customer!",
+//			PageLink:   "https://example.com",
+//		},
+//		Originator: OriginatorCustomer,
+//		Customer: Customer{
+//			ExternalID: "client_id_1",
+//			Nickname:   "customer",
+//			Firstname:  "Tester",
+//			Lastname:   "Tester",
+//			Avatar:     "https://example.com/image.png",
+//			ProfileURL: "https://example.com/user/client_id_1",
+//			Language:   "en",
+//			Utm: &Utm{
+//				Source:   "myspace.com",
+//				Medium:   "social",
+//				Campaign: "something",
+//				Term:     "fedora",
+//				Content:  "autumn_collection",
+//			},
+//		},
+//		Channel:        305,
+//		ExternalChatID: "chat_id_1",
+//		ReplyDeadline: getReplyDeadline(24 * time.Hour),
+//	})
+//	if err != nil {
+//		log.Fatalf("request error: %s (%d)", err, status)
+//	}
+//
+//	log.Printf("status: %d, message ID: %d", status, resp.MessageID)
+package v1
+
+import (
+	"log"
+	"time"
+)
+
+func ooga() {
+	client := New("https://message-gateway.url", "cb8ccf05e38a47543ad8477d4999be73bff503ea6")
+	getReplyDeadline := func(after time.Duration) *time.Time {
+		deadline := time.Now().Add(after)
+		return &deadline
+	}
+	resp, status, err := client.Messages(SendData{
+		Message: Message{
+			ExternalID: "uid_1",
+			Type:       MsgTypeText,
+			Text:       "Hello customer!",
+			PageLink:   "https://example.com",
+		},
+		Originator: OriginatorCustomer,
+		Customer: Customer{
+			ExternalID: "client_id_1",
+			Nickname:   "customer",
+			Firstname:  "Tester",
+			Lastname:   "Tester",
+			Avatar:     "https://example.com/image.png",
+			ProfileURL: "https://example.com/user/client_id_1",
+			Language:   "en",
+			Utm: &Utm{
+				Source:   "myspace.com",
+				Medium:   "social",
+				Campaign: "something",
+				Term:     "fedora",
+				Content:  "autumn_collection",
+			},
+		},
+		Channel:        305,
+		ExternalChatID: "chat_id_1",
+		ReplyDeadline:  getReplyDeadline(24 * time.Hour),
+	})
+	if err != nil {
+		log.Fatalf("request error: %s (%d)", err, status)
+	}
+
+	log.Printf("status: %d, message ID: %d", status, resp.MessageID)
+}
diff --git a/v1/errors.go b/v1/errors.go
index f25d16b..e23db09 100644
--- a/v1/errors.go
+++ b/v1/errors.go
@@ -82,3 +82,9 @@ func NewServerError(response *http.Response) error {
 
 	return err
 }
+
+func AsClientError(err error) *HTTPClientError {
+	for {
+		
+	}
+}