diff --git a/cmd/cart/pool-server.go b/cmd/cart/pool-server.go
index 047fe32..b71986f 100644
--- a/cmd/cart/pool-server.go
+++ b/cmd/cart/pool-server.go
@@ -164,12 +164,34 @@ func (s *PoolServer) HandleQuantityChange(w http.ResponseWriter, r *http.Request
 	return s.WriteResult(w, reply)
 }
 
+type Item struct {
+	Sku      string  `json:"sku"`
+	Quantity int     `json:"quantity"`
+	StoreId  *string `json:"storeId,omitempty"`
+}
+
 type SetCartItems struct {
 	Country string `json:"country"`
-	Items   []struct {
-		Sku      string `json:"sku"`
-		Quantity int    `json:"quantity"`
-	} `json:"items"`
+	Items   []Item `json:"items"`
+}
+
+func getMultipleAddMessages(items []Item, country string) []proto.Message {
+	wg := sync.WaitGroup{}
+	msgs := make([]proto.Message, 0, len(items))
+	for _, itm := range items {
+		wg.Add(1)
+		go func(itm Item) {
+			defer wg.Done()
+			msg, err := GetItemAddMessage(itm.Sku, itm.Quantity, country, itm.StoreId)
+			if err != nil {
+				log.Printf("error adding item %s: %v", itm.Sku, err)
+				return
+			}
+			msgs = append(msgs, msg)
+		}(itm)
+	}
+	wg.Wait()
+	return msgs
 }
 
 func (s *PoolServer) HandleSetCartItems(w http.ResponseWriter, r *http.Request, id CartId) error {
@@ -181,22 +203,7 @@ func (s *PoolServer) HandleSetCartItems(w http.ResponseWriter, r *http.Request,
 
 	msgs := make([]proto.Message, 0, len(setCartItems.Items)+1)
 	msgs = append(msgs, &messages.ClearCartRequest{})
-	wg := sync.WaitGroup{}
-	for _, item := range setCartItems.Items {
-		wg.Add(1)
-		go func(sku string, quantity int) {
-			defer wg.Done()
-			msg, err := GetItemAddMessage(sku, quantity, setCartItems.Country, nil)
-			if err != nil {
-				log.Printf("error adding item %s: %v", sku, err)
-				return
-			}
-			msgs = append(msgs, msg)
-
-		}(item.Sku, item.Quantity)
-	}
-
-	wg.Wait()
+	msgs = append(msgs, getMultipleAddMessages(setCartItems.Items, setCartItems.Country)...)
 
 	reply, err := s.ApplyLocal(id, msgs...)
 	if err != nil {
@@ -205,6 +212,20 @@ func (s *PoolServer) HandleSetCartItems(w http.ResponseWriter, r *http.Request,
 	return s.WriteResult(w, reply)
 }
 
+func (s *PoolServer) HandleAddMultiple(w http.ResponseWriter, r *http.Request, id CartId) error {
+	setCartItems := SetCartItems{}
+	err := json.NewDecoder(r.Body).Decode(&setCartItems)
+	if err != nil {
+		return err
+	}
+
+	reply, err := s.ApplyLocal(id, getMultipleAddMessages(setCartItems.Items, setCartItems.Country)...)
+	if err != nil {
+		return err
+	}
+	return s.WriteResult(w, reply)
+}
+
 func (s *PoolServer) HandleAddRequest(w http.ResponseWriter, r *http.Request, id CartId) error {
 	addRequest := messages.AddRequest{}
 	err := json.NewDecoder(r.Body).Decode(&addRequest)
@@ -426,6 +447,7 @@ func (s *PoolServer) Serve() *http.ServeMux {
 
 	mux.HandleFunc("GET /", CookieCartIdHandler(s.ProxyHandler(s.HandleGet)))
 	mux.HandleFunc("GET /add/{sku}", CookieCartIdHandler(s.ProxyHandler(s.HandleAddSku)))
+	mux.HandleFunc("POST /add", CookieCartIdHandler(s.ProxyHandler(s.HandleAddMultiple)))
 	mux.HandleFunc("POST /", CookieCartIdHandler(s.ProxyHandler(s.HandleAddRequest)))
 	mux.HandleFunc("POST /set", CookieCartIdHandler(s.ProxyHandler(s.HandleSetCartItems)))
 	mux.HandleFunc("DELETE /{itemId}", CookieCartIdHandler(s.ProxyHandler(s.HandleDeleteItem)))