diff --git a/src/Sales/Interfaces/Http/Api/V1/OrderController.php b/src/Sales/Interfaces/Http/Api/V1/OrderController.php
new file mode 100644
index 0000000..b2a6fa5
--- /dev/null
+++ b/src/Sales/Interfaces/Http/Api/V1/OrderController.php
@@ -0,0 +1,84 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Sales\Interfaces\Http\Api\V1;
+
+use MiniShop\Sales\Application\Command\ConfirmOrder;
+use MiniShop\Sales\Application\Command\ConfirmOrderHandler;
+use MiniShop\Sales\Application\Command\PlaceOrder;
+use MiniShop\Sales\Application\Command\PlaceOrderHandler;
+use MiniShop\Sales\Application\Query\GetOrderById;
+use MiniShop\Sales\Application\Query\GetOrderByIdHandler;
+use MiniShop\Sales\Application\Query\ListOrdersByCustomer;
+use MiniShop\Sales\Application\Query\ListOrdersByCustomerHandler;
+use MiniShop\Shared\Technical\UuidGenerator;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+/**
+ * Open Host Service — sales.v1
+ * API stable et versionnee. Les modeles internes ne sont jamais exposes.
+ * Tous les DTOs de reponse passent par OrderViewAssembler → OrderView (Published Language).
+ */
+#[Route('/api/sales/v1')]
+final readonly class OrderController
+{
+    public function __construct(
+        private PlaceOrderHandler $placeOrderHandler,
+        private ConfirmOrderHandler $confirmOrderHandler,
+        private GetOrderByIdHandler $getOrderByIdHandler,
+        private ListOrdersByCustomerHandler $listOrdersByCustomerHandler,
+        private OrderViewAssembler $assembler,
+    ) {}
+
+    #[Route('/orders', name: 'ohs_sales_place_order', methods: ['POST'])]
+    public function placeOrder(Request $request): JsonResponse
+    {
+        /** @var array{customerId: string, lines: list<array{productName: string, quantity: int, unitPriceInCents: int, currency: string}>} $data */
+        $data = json_decode($request->getContent(), true, flags: JSON_THROW_ON_ERROR);
+
+        $orderId = UuidGenerator::generate();
+
+        ($this->placeOrderHandler)(new PlaceOrder(
+            orderId: $orderId,
+            customerId: $data['customerId'],
+            lines: $data['lines'],
+        ));
+
+        $order = ($this->getOrderByIdHandler)(new GetOrderById($orderId));
+
+        return new JsonResponse($this->assembler->toView($order), Response::HTTP_CREATED);
+    }
+
+    #[Route('/orders/{orderId}', name: 'ohs_sales_get_order', methods: ['GET'])]
+    public function getOrder(string $orderId): JsonResponse
+    {
+        $order = ($this->getOrderByIdHandler)(new GetOrderById($orderId));
+
+        return new JsonResponse($this->assembler->toView($order));
+    }
+
+    #[Route('/orders/{orderId}/confirm', name: 'ohs_sales_confirm_order', methods: ['POST'])]
+    public function confirmOrder(string $orderId): JsonResponse
+    {
+        ($this->confirmOrderHandler)(new ConfirmOrder(orderId: $orderId));
+
+        $order = ($this->getOrderByIdHandler)(new GetOrderById($orderId));
+
+        return new JsonResponse($this->assembler->toView($order));
+    }
+
+    #[Route('/customers/{customerId}/orders', name: 'ohs_sales_list_orders', methods: ['GET'])]
+    public function listOrders(string $customerId): JsonResponse
+    {
+        $orders = ($this->listOrdersByCustomerHandler)(new ListOrdersByCustomer($customerId));
+
+        return new JsonResponse(array_map(
+            fn ($order) => $this->assembler->toView($order),
+            $orders,
+        ));
+    }
+}
diff --git a/src/Sales/Interfaces/Http/Api/V1/OrderViewAssembler.php b/src/Sales/Interfaces/Http/Api/V1/OrderViewAssembler.php
new file mode 100644
index 0000000..b3899cf
--- /dev/null
+++ b/src/Sales/Interfaces/Http/Api/V1/OrderViewAssembler.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Sales\Interfaces\Http\Api\V1;
+
+use MiniShop\Contracts\Sales\V1\Api\OrderView;
+use MiniShop\Sales\Domain\Model\Order;
+use MiniShop\Sales\Domain\Model\OrderLine;
+
+/**
+ * Assemble le modele interne Order vers le DTO public OrderView (sales.v1).
+ * Les modeles internes de Sales ne sont jamais exposes directement.
+ */
+final class OrderViewAssembler
+{
+    public function toView(Order $order): OrderView
+    {
+        return new OrderView(
+            orderId: $order->id->toString(),
+            customerId: $order->customerId->toString(),
+            status: $order->status()->value,
+            totalInCents: $order->total()->amount,
+            currency: $order->total()->currency,
+            lines: array_map(
+                static fn (OrderLine $line): array => [
+                    'productName' => $line->productName,
+                    'quantity' => $line->quantity,
+                    'unitPriceInCents' => $line->unitPrice->amount,
+                    'currency' => $line->unitPrice->currency,
+                    'lineTotalInCents' => $line->lineTotal()->amount,
+                ],
+                $order->lines(),
+            ),
+        );
+    }
+}
diff --git a/tests/Integration/Sales/OhsApiTest.php b/tests/Integration/Sales/OhsApiTest.php
new file mode 100644
index 0000000..8219b36
--- /dev/null
+++ b/tests/Integration/Sales/OhsApiTest.php
@@ -0,0 +1,94 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Integration\Sales;
+
+use MiniShop\Contracts\Sales\V1\Api\OrderView;
+use MiniShop\Sales\Application\Command\PlaceOrder;
+use MiniShop\Sales\Application\Command\PlaceOrderHandler;
+use MiniShop\Sales\Application\Query\GetOrderById;
+use MiniShop\Sales\Application\Query\GetOrderByIdHandler;
+use MiniShop\Sales\Domain\Model\OrderLine;
+use MiniShop\Sales\Interfaces\Http\Api\V1\OrderViewAssembler;
+use MiniShop\Sales\Infrastructure\Persistence\InMemoryOrderRepository;
+use MiniShop\Shared\Technical\SystemClock;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test de l'Open Host Service : verifie que l'API OHS expose uniquement
+ * des DTOs du Published Language (OrderView) et jamais les modeles internes.
+ */
+final class OhsApiTest extends TestCase
+{
+    public function test_assembler_returns_order_view_contract(): void
+    {
+        $orderRepo = new InMemoryOrderRepository();
+        $clock = new SystemClock();
+        $assembler = new OrderViewAssembler();
+
+        // Create a stub publisher that does nothing
+        $publisher = new class implements \MiniShop\Sales\Application\Port\SalesEventPublisher {
+            public function publishOrderPlaced(\MiniShop\Sales\Domain\Event\OrderPlaced $event): void {}
+            public function publishOrderConfirmed(\MiniShop\Sales\Domain\Event\OrderConfirmed $event): void {}
+            public function publishOrderCancelled(\MiniShop\Sales\Domain\Event\OrderCancelled $event): void {}
+        };
+
+        $placeHandler = new PlaceOrderHandler($orderRepo, $publisher, $clock);
+        $getHandler = new GetOrderByIdHandler($orderRepo);
+
+        $orderId = 'ohs-test-001';
+        ($placeHandler)(new PlaceOrder(
+            orderId: $orderId,
+            customerId: 'cust-001',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+            ],
+        ));
+
+        $order = ($getHandler)(new GetOrderById($orderId));
+        $view = $assembler->toView($order);
+
+        // Verifie que le retour est un DTO du Published Language
+        self::assertInstanceOf(OrderView::class, $view);
+        self::assertSame($orderId, $view->orderId);
+        self::assertSame('placed', $view->status);
+        self::assertSame(3000, $view->totalInCents);
+        self::assertSame('EUR', $view->currency);
+        self::assertCount(1, $view->lines);
+    }
+
+    public function test_order_view_does_not_expose_internal_model(): void
+    {
+        $assembler = new OrderViewAssembler();
+        $orderRepo = new InMemoryOrderRepository();
+        $clock = new SystemClock();
+        $publisher = new class implements \MiniShop\Sales\Application\Port\SalesEventPublisher {
+            public function publishOrderPlaced(\MiniShop\Sales\Domain\Event\OrderPlaced $event): void {}
+            public function publishOrderConfirmed(\MiniShop\Sales\Domain\Event\OrderConfirmed $event): void {}
+            public function publishOrderCancelled(\MiniShop\Sales\Domain\Event\OrderCancelled $event): void {}
+        };
+
+        ($placeHandler = new PlaceOrderHandler($orderRepo, $publisher, $clock))(new PlaceOrder(
+            orderId: 'ohs-test-002',
+            customerId: 'cust-001',
+            lines: [['productName' => 'Widget', 'quantity' => 1, 'unitPriceInCents' => 1000, 'currency' => 'EUR']],
+        ));
+
+        $order = (new GetOrderByIdHandler($orderRepo))(new GetOrderById('ohs-test-002'));
+        $view = $assembler->toView($order);
+
+        $json = json_encode($view, JSON_THROW_ON_ERROR);
+        $decoded = json_decode($json, true, flags: JSON_THROW_ON_ERROR);
+
+        // Le JSON ne doit contenir que les champs du Published Language
+        $allowedKeys = ['orderId', 'customerId', 'status', 'totalInCents', 'currency', 'lines'];
+        self::assertSame($allowedKeys, array_keys($decoded));
+
+        // Les lignes ne doivent pas contenir de types internes (Money, OrderLine)
+        $lineKeys = array_keys($decoded['lines'][0]);
+        self::assertContains('productName', $lineKeys);
+        self::assertContains('lineTotalInCents', $lineKeys);
+        self::assertNotContains('unitPrice', $lineKeys); // pas d'objet Money
+    }
+}