diff --git a/app/config.py b/app/config.py
index 1b47e755..7de6f435 100644
--- a/app/config.py
+++ b/app/config.py
@@ -6,7 +6,8 @@ import re
 import html
 from collections import defaultdict
 from datetime import time
-from typing import List, Optional, Union, Dict
+from typing import Dict, List, Optional, Union
+from urllib.parse import urlparse
 from zoneinfo import ZoneInfo
 from pydantic_settings import BaseSettings
 from pydantic import field_validator, Field
@@ -254,6 +255,7 @@ class Settings(BaseSettings):
     MULENPAY_PAYMENT_MODE: int = 4
     MULENPAY_MIN_AMOUNT_KOPEKS: int = 10000
     MULENPAY_MAX_AMOUNT_KOPEKS: int = 10000000
+    MULENPAY_IFRAME_EXPECTED_ORIGIN: Optional[str] = None
 
     PAL24_ENABLED: bool = False
     PAL24_API_TOKEN: Optional[str] = None
@@ -943,6 +945,20 @@ class Settings(BaseSettings):
     def get_mulenpay_display_name_html(self) -> str:
         return html.escape(self.get_mulenpay_display_name())
 
+    def get_mulenpay_expected_origin(self) -> Optional[str]:
+        override = (self.MULENPAY_IFRAME_EXPECTED_ORIGIN or "").strip()
+        if override:
+            return override
+
+        base_url = (self.MULENPAY_BASE_URL or "").strip()
+        if not base_url:
+            return None
+
+        parsed = urlparse(base_url)
+        if parsed.scheme and parsed.netloc:
+            return f"{parsed.scheme}://{parsed.netloc}"
+        return None
+
     def is_pal24_enabled(self) -> bool:
         return (
             self.PAL24_ENABLED
diff --git a/app/webapi/routes/miniapp.py b/app/webapi/routes/miniapp.py
index 3a38a713..f4937461 100644
--- a/app/webapi/routes/miniapp.py
+++ b/app/webapi/routes/miniapp.py
@@ -10,6 +10,7 @@ from typing import Any, Awaitable, Callable, Dict, List, Optional, Tuple, Union
 
 from aiogram import Bot
 from fastapi import APIRouter, Depends, HTTPException, status
+from pydantic import ValidationError
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
@@ -113,6 +114,8 @@ from ..schemas.miniapp import (
     MiniAppLegalDocuments,
     MiniAppPaymentCreateRequest,
     MiniAppPaymentCreateResponse,
+    MiniAppPaymentIframeConfig,
+    MiniAppPaymentIntegrationType,
     MiniAppPaymentMethod,
     MiniAppPaymentMethodsRequest,
     MiniAppPaymentMethodsResponse,
@@ -624,6 +627,18 @@ def _normalize_amount_kopeks(
     return normalized if normalized >= 0 else None
 
 
+def _build_mulenpay_iframe_config() -> Optional[MiniAppPaymentIframeConfig]:
+    expected_origin = settings.get_mulenpay_expected_origin()
+    if not expected_origin:
+        return None
+
+    try:
+        return MiniAppPaymentIframeConfig(expected_origin=expected_origin)
+    except ValidationError as error:  # pragma: no cover - defensive logging
+        logger.error("Invalid MulenPay expected origin '%s': %s", expected_origin, error)
+        return None
+
+
 @router.post(
     "/payments/methods",
     response_model=MiniAppPaymentMethodsResponse,
@@ -646,6 +661,7 @@ async def get_payment_methods(
                 currency="RUB",
                 min_amount_kopeks=stars_min_amount,
                 amount_step_kopeks=stars_min_amount,
+                integration_type=MiniAppPaymentIntegrationType.REDIRECT,
             )
         )
 
@@ -659,6 +675,7 @@ async def get_payment_methods(
                     currency="RUB",
                     min_amount_kopeks=settings.YOOKASSA_MIN_AMOUNT_KOPEKS,
                     max_amount_kopeks=settings.YOOKASSA_MAX_AMOUNT_KOPEKS,
+                    integration_type=MiniAppPaymentIntegrationType.REDIRECT,
                 )
             )
 
@@ -670,10 +687,17 @@ async def get_payment_methods(
                 currency="RUB",
                 min_amount_kopeks=settings.YOOKASSA_MIN_AMOUNT_KOPEKS,
                 max_amount_kopeks=settings.YOOKASSA_MAX_AMOUNT_KOPEKS,
+                integration_type=MiniAppPaymentIntegrationType.REDIRECT,
             )
         )
 
     if settings.is_mulenpay_enabled():
+        mulenpay_iframe_config = _build_mulenpay_iframe_config()
+        mulenpay_integration = (
+            MiniAppPaymentIntegrationType.IFRAME
+            if mulenpay_iframe_config
+            else MiniAppPaymentIntegrationType.REDIRECT
+        )
         methods.append(
             MiniAppPaymentMethod(
                 id="mulenpay",
@@ -683,6 +707,8 @@ async def get_payment_methods(
                 currency="RUB",
                 min_amount_kopeks=settings.MULENPAY_MIN_AMOUNT_KOPEKS,
                 max_amount_kopeks=settings.MULENPAY_MAX_AMOUNT_KOPEKS,
+                integration_type=mulenpay_integration,
+                iframe_config=mulenpay_iframe_config,
             )
         )
 
@@ -695,6 +721,7 @@ async def get_payment_methods(
                 currency="RUB",
                 min_amount_kopeks=settings.PAL24_MIN_AMOUNT_KOPEKS,
                 max_amount_kopeks=settings.PAL24_MAX_AMOUNT_KOPEKS,
+                integration_type=MiniAppPaymentIntegrationType.REDIRECT,
             )
         )
 
@@ -707,6 +734,7 @@ async def get_payment_methods(
                 currency="RUB",
                 min_amount_kopeks=settings.WATA_MIN_AMOUNT_KOPEKS,
                 max_amount_kopeks=settings.WATA_MAX_AMOUNT_KOPEKS,
+                integration_type=MiniAppPaymentIntegrationType.REDIRECT,
             )
         )
 
@@ -721,6 +749,7 @@ async def get_payment_methods(
                 currency="RUB",
                 min_amount_kopeks=min_amount_kopeks,
                 max_amount_kopeks=max_amount_kopeks,
+                integration_type=MiniAppPaymentIntegrationType.REDIRECT,
             )
         )
 
@@ -733,6 +762,7 @@ async def get_payment_methods(
                 currency="RUB",
                 min_amount_kopeks=100 * 100,
                 max_amount_kopeks=100_000 * 100,
+                integration_type=MiniAppPaymentIntegrationType.REDIRECT,
             )
         )
 
@@ -743,6 +773,7 @@ async def get_payment_methods(
                 icon="💎",
                 requires_amount=False,
                 currency="RUB",
+                integration_type=MiniAppPaymentIntegrationType.REDIRECT,
             )
         )
 
diff --git a/app/webapi/schemas/miniapp.py b/app/webapi/schemas/miniapp.py
index 839a6f17..ac31f350 100644
--- a/app/webapi/schemas/miniapp.py
+++ b/app/webapi/schemas/miniapp.py
@@ -1,9 +1,11 @@
 from __future__ import annotations
 
 from datetime import datetime
+from enum import Enum
 from typing import Any, Dict, List, Optional
+from urllib.parse import urlparse
 
-from pydantic import BaseModel, Field, ConfigDict, model_validator
+from pydantic import BaseModel, ConfigDict, Field, model_validator
 
 
 class MiniAppBranding(BaseModel):
@@ -357,6 +359,30 @@ class MiniAppPaymentMethodsRequest(BaseModel):
     init_data: str = Field(..., alias="initData")
 
 
+class MiniAppPaymentIntegrationType(str, Enum):
+    IFRAME = "iframe"
+    REDIRECT = "redirect"
+
+
+class MiniAppPaymentIframeConfig(BaseModel):
+    expected_origin: str
+
+    @model_validator(mode="after")
+    def _normalize_expected_origin(
+        cls, values: "MiniAppPaymentIframeConfig"
+    ) -> "MiniAppPaymentIframeConfig":
+        origin = (values.expected_origin or "").strip()
+        if not origin:
+            raise ValueError("expected_origin must not be empty")
+
+        parsed = urlparse(origin)
+        if not parsed.scheme or not parsed.netloc:
+            raise ValueError("expected_origin must include scheme and host")
+
+        values.expected_origin = f"{parsed.scheme}://{parsed.netloc}"
+        return values
+
+
 class MiniAppPaymentMethod(BaseModel):
     id: str
     name: Optional[str] = None
@@ -366,6 +392,17 @@ class MiniAppPaymentMethod(BaseModel):
     min_amount_kopeks: Optional[int] = None
     max_amount_kopeks: Optional[int] = None
     amount_step_kopeks: Optional[int] = None
+    integration_type: MiniAppPaymentIntegrationType
+    iframe_config: Optional[MiniAppPaymentIframeConfig] = None
+
+    @model_validator(mode="after")
+    def _ensure_iframe_config(cls, values: "MiniAppPaymentMethod") -> "MiniAppPaymentMethod":
+        if (
+            values.integration_type == MiniAppPaymentIntegrationType.IFRAME
+            and values.iframe_config is None
+        ):
+            raise ValueError("iframe_config is required when integration_type is 'iframe'")
+        return values
 
 
 class MiniAppPaymentMethodsResponse(BaseModel):
diff --git a/docs/miniapp-setup.md b/docs/miniapp-setup.md
index 4a7bfadf..ed24f132 100644
--- a/docs/miniapp-setup.md
+++ b/docs/miniapp-setup.md
@@ -151,4 +151,36 @@ Caddy автоматически выпустит сертификаты чер
 | Mini App не открывается в Telegram | URL не соответствует HTTPS или отсутствует сертификат. | Обновите сертификаты и убедитесь, что домен доступен по HTTPS. |
 | Нет ссылок подписки | Не настроена интеграция с RemnaWave или у пользователя нет активной подписки. | Проверьте `REMNAWAVE_API_URL/KEY` и статус подписки пользователя. |
 
+## 11. Формат ответа `/miniapp/payments/methods`
+
+Эндпоинт `POST /miniapp/payments/methods` возвращает список доступных способов оплаты. Каждый элемент массива `methods` содержит базовые поля (`id`, `title`, `description`, ограничения по сумме) и дополнительные атрибуты, управляющие интеграцией во фронтенде:
+
+- `integration_type` — тип интеграции, обязательное поле. Возможные значения:
+  - `iframe` — форму оплаты нужно отображать внутри мини-приложения в `<iframe>`.
+  - `redirect` — необходимо выполнить переход на внешнюю страницу.
+- `iframe_config` — объект с настройками, присутствует только при `integration_type = "iframe"`.
+  - `expected_origin` — origin страницы платёжного провайдера. Значение используется при проверке `event.origin` для сообщений, полученных через `postMessage` от платежного iframe.
+
+Пример фрагмента ответа:
+
+```json
+{
+  "methods": [
+    {
+      "id": "mulenpay",
+      "title": "Банковская карта",
+      "integration_type": "iframe",
+      "iframe_config": {
+        "expected_origin": "https://checkout.example"
+      }
+    },
+    {
+      "id": "cryptobot",
+      "title": "CryptoBot",
+      "integration_type": "redirect"
+    }
+  ]
+}
+```
+
 После настройки вы сможете использовать мини-приложение в бот-меню и отправлять ссылку пользователям напрямую.
diff --git a/tests/test_miniapp_payments.py b/tests/test_miniapp_payments.py
index fc30664a..9bbbb3a7 100644
--- a/tests/test_miniapp_payments.py
+++ b/tests/test_miniapp_payments.py
@@ -21,6 +21,7 @@ from app.webapi.routes import miniapp
 from app.database.models import PaymentMethod
 from app.webapi.schemas.miniapp import (
     MiniAppPaymentCreateRequest,
+    MiniAppPaymentIntegrationType,
     MiniAppPaymentMethodsRequest,
     MiniAppPaymentStatusQuery,
 )
@@ -491,6 +492,8 @@ async def test_get_payment_methods_exposes_stars_min_amount(monkeypatch):
     assert stars_method is not None
     assert stars_method.min_amount_kopeks == 99999
     assert stars_method.amount_step_kopeks == 99999
+    assert stars_method.integration_type == MiniAppPaymentIntegrationType.REDIRECT
+    assert stars_method.iframe_config is None
 
 
 @pytest.mark.anyio("asyncio")
@@ -515,6 +518,32 @@ async def test_get_payment_methods_includes_wata(monkeypatch):
     assert wata_method.min_amount_kopeks == 5000
     assert wata_method.max_amount_kopeks == 7500000
     assert wata_method.icon == '🌊'
+    assert wata_method.integration_type == MiniAppPaymentIntegrationType.REDIRECT
+    assert wata_method.iframe_config is None
+
+
+@pytest.mark.anyio("asyncio")
+async def test_get_payment_methods_marks_mulenpay_iframe(monkeypatch):
+    monkeypatch.setattr(settings, 'MULENPAY_ENABLED', True, raising=False)
+    monkeypatch.setattr(settings, 'MULENPAY_API_KEY', 'api-key', raising=False)
+    monkeypatch.setattr(settings, 'MULENPAY_SECRET_KEY', 'secret', raising=False)
+    monkeypatch.setattr(settings, 'MULENPAY_SHOP_ID', 99, raising=False)
+    monkeypatch.setattr(settings, 'MULENPAY_BASE_URL', 'https://checkout.example/api', raising=False)
+    monkeypatch.setattr(settings, 'MULENPAY_IFRAME_EXPECTED_ORIGIN', None, raising=False)
+
+    async def fake_resolve_user(db, init_data):
+        return types.SimpleNamespace(id=1, language='ru'), {}
+
+    monkeypatch.setattr(miniapp, '_resolve_user_from_init_data', fake_resolve_user)
+
+    payload = MiniAppPaymentMethodsRequest(initData='abc')
+    response = await miniapp.get_payment_methods(payload, db=types.SimpleNamespace())
+
+    mulenpay_method = next((method for method in response.methods if method.id == 'mulenpay'), None)
+    assert mulenpay_method is not None
+    assert mulenpay_method.integration_type == MiniAppPaymentIntegrationType.IFRAME
+    assert mulenpay_method.iframe_config is not None
+    assert str(mulenpay_method.iframe_config.expected_origin) == 'https://checkout.example'
 @pytest.mark.anyio("asyncio")
 async def test_find_recent_deposit_ignores_transactions_before_attempt():
     started_at = datetime(2024, 5, 1, 12, 0, 0)