diff --git a/api-tests/cart.http b/api-tests/cart.http
new file mode 100644
index 0000000..0ce09c9
--- /dev/null
+++ b/api-tests/cart.http
@@ -0,0 +1,38 @@
+
+### Add item to cart
+POST https://cart.tornberg.me/api/12345
+Content-Type: application/json
+
+{
+	"sku": "763281",
+	"quantity": 1
+}
+
+### Update quanity of item in cart
+PUT https://cart.tornberg.me/api/12345/1
+Content-Type: application/json
+
+{
+	"quantity": 1
+}
+
+### Add item to cart
+POST http://localhost:8080/cart/12345/item
+Content-Type: application/json
+
+{
+	"itemId": "67890",
+	"quantity": 2
+}
+
+### Remove item from cart
+DELETE http://localhost:8080/cart/12345/item/67890
+
+### Checkout cart
+POST http://localhost:8080/cart/12345/checkout
+Content-Type: application/json
+
+{
+	"paymentMethod": "credit_card",
+	"shippingAddress": "123 Main St, Anytown, USA"
+}
\ No newline at end of file
diff --git a/pool-server.go b/pool-server.go
index 3928c68..1cf4345 100644
--- a/pool-server.go
+++ b/pool-server.go
@@ -164,14 +164,15 @@ func (s *PoolServer) HandleRemoveDelivery(w http.ResponseWriter, r *http.Request
 
 func (s *PoolServer) HandleQuantityChange(w http.ResponseWriter, r *http.Request) error {
 	id := r.PathValue("id")
-	itemIdString := r.PathValue("itemId")
-	itemId, err := strconv.Atoi(itemIdString)
+
+	changeQuantity := messages.ChangeQuantity{}
+	err := json.NewDecoder(r.Body).Decode(&changeQuantity)
 	if err != nil {
 		return err
 	}
 	reply, err := s.pool.Process(ToCartId(id), Message{
 		Type:    ChangeQuantityType,
-		Content: &messages.ChangeQuantity{Id: int64(itemId)},
+		Content: changeQuantity,
 	})
 	if err != nil {
 		return err
@@ -182,14 +183,14 @@ func (s *PoolServer) HandleQuantityChange(w http.ResponseWriter, r *http.Request
 func (s *PoolServer) HandleAddRequest(w http.ResponseWriter, r *http.Request) error {
 	id := r.PathValue("id")
 
-	pickupPoint := messages.AddRequest{}
-	err := json.NewDecoder(r.Body).Decode(&pickupPoint)
+	addRequest := messages.AddRequest{}
+	err := json.NewDecoder(r.Body).Decode(&addRequest)
 	if err != nil {
 		return err
 	}
 	reply, err := s.pool.Process(ToCartId(id), Message{
 		Type:    AddRequestType,
-		Content: &pickupPoint,
+		Content: &addRequest,
 	})
 	if err != nil {
 		return err
@@ -203,7 +204,7 @@ func (s *PoolServer) Serve() *http.ServeMux {
 	mux.HandleFunc("GET /{id}/add/{sku}", ErrorHandler(s.HandleAddSku))
 	mux.HandleFunc("POST /{id}", ErrorHandler(s.HandleAddRequest))
 	mux.HandleFunc("DELETE /{id}/{itemId}", ErrorHandler(s.HandleDeleteItem))
-	mux.HandleFunc("PUT /{id}/{itemId}", ErrorHandler(s.HandleQuantityChange))
+	mux.HandleFunc("PUT /{id}", ErrorHandler(s.HandleQuantityChange))
 	mux.HandleFunc("POST /{id}/delivery", ErrorHandler(s.HandleSetDelivery))
 	mux.HandleFunc("DELETE /{id}/delivery/{deliveryId}", ErrorHandler(s.HandleRemoveDelivery))
 	mux.HandleFunc("PUT /{id}/delivery/{deliveryId}/pickupPoint", ErrorHandler(s.HandleSetPickupPoint))
diff --git a/synced-pool_test.go b/synced-pool_test.go
index 46ca9f7..8845055 100644
--- a/synced-pool_test.go
+++ b/synced-pool_test.go
@@ -16,7 +16,7 @@ func TestConnection(t *testing.T) {
 			Id:              id,
 			storageMessages: []Message{},
 			Items:           []*CartItem{},
-			Deliveries:      make([]CartDelivery, 0),
+			Deliveries:      make([]*CartDelivery, 0),
 			TotalPrice:      0,
 		}, nil
 	})