diff --git a/frontend-client/src/api/client.ts b/frontend-client/src/api/client.ts
index 50a8623..c0dab99 100644
--- a/frontend-client/src/api/client.ts
+++ b/frontend-client/src/api/client.ts
@@ -106,20 +106,26 @@ export async function lockSeatApi(
   return { ticketId: response.data.ticket_id ?? seatId };
 }
 
-// ─── Payment webhook ──────────────────────────────────────────────────────────
+// ─── Acquring / booking ───────────────────────────────────────────────────────
+
+export interface BookTicketResponse {
+  ticket_id: number;
+  /** Redirect URL returned by the payment gateway (YooKassa, etc.) */
+  payment_url: string;
+}
 
 /**
- * POST /api/webhooks/payment
- * Simulates a payment gateway callback for the given ticket.
- * Uses a random idempotency key to satisfy the backend's idempotency check.
+ * POST /api/tickets/book
+ * Books a seat and initiates an acquiring session.
+ * On success, caller must redirect to `payment_url`.
+ * Throws AxiosError 400/404 if the seat is taken, locked, or not found.
+ * Requires a valid Bearer token (injected by the request interceptor).
  */
-export async function processPaymentWebhook(ticketId: number): Promise<void> {
-  const idempotencyKey = "req-" + Math.random().toString(36).substring(2, 9);
-  await apiClient.post("/webhooks/payment", {
-    ticket_id: ticketId,
-    idempotency_key: idempotencyKey,
-    status: "success",
+export async function bookTicket(seatId: number): Promise<BookTicketResponse> {
+  const response = await apiClient.post<BookTicketResponse>("/tickets/book", {
+    seat_id: seatId,
   });
+  return response.data;
 }
 
 // ─── Ticket scanner ───────────────────────────────────────────────────────────
diff --git a/frontend-client/src/app/checkout/page.tsx b/frontend-client/src/app/checkout/page.tsx
index 413e3fa..3a205d4 100644
--- a/frontend-client/src/app/checkout/page.tsx
+++ b/frontend-client/src/app/checkout/page.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from "react";
+import { useCallback, useState } from "react";
 import { useRouter } from "next/navigation";
 import {
   ArrowLeft,
@@ -11,8 +11,9 @@ import {
   Loader2,
 } from "lucide-react";
 import Image from "next/image";
+import type { AxiosError } from "axios";
 import { useCartStore, type CartSeat } from "@/store/cartStore";
-import { processPaymentWebhook } from "@/api/client";
+import { bookTicket } from "@/api/client";
 
 // ─── Mock event data (real data would come from route param / API) ─────────────
 
@@ -97,26 +98,40 @@ export default function CheckoutPage() {
   const finalTotal      = rawTotal - bonusDiscount;
   const seatGroups      = groupByRow(seats);
 
-  function showToast(message: string, isError = false) {
+  const showToast = useCallback((message: string, isError = false) => {
     setToastMsg(message);
     setToastIsError(isError);
     setTimeout(() => setToastMsg(null), 3000);
-  }
+  }, []);
 
-  async function handlePay() {
+  const handlePay = useCallback(async () => {
+    // Для MVP жестко ограничиваем: один заказ = один билет
     if (seats.length === 0 || isLoading) return;
+    
+    if (seats.length > 1) {
+      showToast("В MVP-версии можно оплатить только одно место за раз. Оставьте в корзине один билет.", true);
+      return;
+    }
+  
     setIsLoading(true);
     try {
-      await Promise.all(seats.map((s: CartSeat) => processPaymentWebhook(s.ticketId)));
-      clearCart();
-      showToast("Оплата прошла успешно!");
-      setTimeout(() => router.push("/tickets"), 1400);
-    } catch {
-      showToast("Ошибка оплаты. Попробуйте снова.", true);
-    } finally {
-      setIsLoading(false);
+      // Берем строго единственное место из корзины
+      const targetSeat = seats[0];
+      const response = await bookTicket(targetSeat.seatId);
+      
+      // Корзину пока НЕ чистим (оставим это на совесть успешного возврата)
+      // Уходим на шлюз. Кнопка остается заблокированной (isLoading: true).
+      window.location.href = response.payment_url;
+      
+    } catch (err) {
+      const axiosErr = err as AxiosError<{ detail: string }>;
+      const detail = axiosErr.response?.data?.detail;
+      const msg = typeof detail === "string" ? detail : "Ошибка связи с платежным шлюзом.";
+      
+      showToast(msg, true);
+      setIsLoading(false); // Разблокируем кнопку только при ошибке
     }
-  }
+  }, [seats, isLoading, showToast]);
 
   // ── Empty cart guard ──
   if (seats.length === 0) {