diff --git a/frameworks/remix-run/application/src/routes/$langstore.api.cart.voucher.tsx b/frameworks/remix-run/application/src/routes/$langstore.api.cart.voucher.tsx
new file mode 100644
index 0000000..f50d7d9
--- /dev/null
+++ b/frameworks/remix-run/application/src/routes/$langstore.api.cart.voucher.tsx
@@ -0,0 +1,19 @@
+import { ActionFunction, ActionFunctionArgs } from '@remix-run/node';
+import { getStoreFront } from '~/use-cases/storefront.server';
+import { privateJson } from '~/core/bridge/privateJson.server';
+import { getContext } from '~/use-cases/http/utils';
+import { validateVoucher } from '~/use-cases/crystallize/read/validateVoucher.server';
+
+export const action: ActionFunction = async ({ request }: ActionFunctionArgs) => {
+    const requestContext = getContext(request);
+    const { secret: storefront } = await getStoreFront(requestContext.host);
+    const body = await request.json();
+
+    const checkVoucher = await validateVoucher(body.voucher, {
+        apiClient: storefront.apiClient,
+    });
+
+    return privateJson({
+        isValid: checkVoucher,
+    });
+};
diff --git a/shared/application/translations/en.json b/shared/application/translations/en.json
index 24880b0..fcd704b 100644
--- a/shared/application/translations/en.json
+++ b/shared/application/translations/en.json
@@ -53,7 +53,9 @@
         "immutable": "You have initiated, finalized or cancelled a payment, this version of your cart is therefore locked.",
         "clone": "Clone previous cart",
         "voucherCode": "Voucher code",
-        "useVoucher": "Use voucher"
+        "useVoucher": "Use voucher",
+        "voucherApplied": "Voucher applied.",
+        "voucherInvalid": "Voucher is invalid."
     },
     "dimensions": "Dimensions",
     "specifications": "Manuals and specifications",
diff --git a/shared/application/translations/fr.json b/shared/application/translations/fr.json
index 661eaa6..b04b552 100644
--- a/shared/application/translations/fr.json
+++ b/shared/application/translations/fr.json
@@ -53,7 +53,9 @@
         "immutable": "Vous avez initié, finalisé ou annulé un paiement, cette version de votre caddie est donc bloquée.",
         "clone": "Cloner le caddie précédent",
         "voucherCode": "Bon de réduction",
-        "useVoucher": "Utiliser bon de réduction"
+        "useVoucher": "Utiliser bon de réduction",
+        "voucherApplied": "Bon de réduction appliqué.",
+        "voucherInvalid": "Le bon de réduction est invalide."
     },
     "dimensions": "Dimensions",
     "specifications": "Manuels et caractéristiques",
diff --git a/shared/application/translations/no.json b/shared/application/translations/no.json
index 6312210..96b1116 100644
--- a/shared/application/translations/no.json
+++ b/shared/application/translations/no.json
@@ -53,7 +53,9 @@
         "immutable": "Du har igangsatt, avsluttet eller kansellert en betaling, denne versjonen av handlekurven din er derfor låst.",
         "clone": "Klone forrige handlekurv",
         "voucherCode": "Rabatt code",
-        "useVoucher": "Bruk rabatt"
+        "useVoucher": "Bruk rabatt",
+        "voucherApplied": "Rabatt brukt.",
+        "voucherInvalid": "Rabattkoden er ugyldig."
     },
     "dimensions": "Dimensjoner",
     "specifications": "Manualer og spesifikasjoner",
diff --git a/shared/application/ui/components/voucher.tsx b/shared/application/ui/components/voucher.tsx
index ef35c54..ed2dfb7 100644
--- a/shared/application/ui/components/voucher.tsx
+++ b/shared/application/ui/components/voucher.tsx
@@ -8,11 +8,21 @@ import { useRemoteCart } from '../hooks/useRemoteCart';
 import { Input } from './input';
 
 export const VoucherForm: React.FC = () => {
-    const { cart: localCart, setVoucher } = useLocalCart();
+    const { cart: localCart, setVoucher, validateVoucher } = useLocalCart();
     const { loading } = useRemoteCart();
     const [voucherValue, setVoucherValue] = useState(localCart?.extra?.voucher ?? '');
+    const [showMessage, setShowMessage] = useState('');
+
     const { _t } = useAppContext();
 
+    const checkVoucher = async (voucher: string) => {
+        if (!voucher) return;
+        const checkVoucher = await validateVoucher(voucher);
+        return checkVoucher.isValid
+            ? setShowMessage(_t('cart.voucherApplied'))
+            : setShowMessage(_t('cart.voucherInvalid'));
+    };
+
     return (
         <ClientOnly>
             <div className="flex flex-col w-full">
@@ -33,6 +43,7 @@ export const VoucherForm: React.FC = () => {
                         className="bg-[#000] text-[#fff] px-2 py-1 rounded mt-5 text-center h-10"
                         onClick={() => {
                             setVoucher(voucherValue);
+                            checkVoucher(voucherValue);
                         }}
                     >
                         {loading && localCart?.extra?.voucher ? _t('loading') : _t('cart.useVoucher')}
@@ -44,12 +55,14 @@ export const VoucherForm: React.FC = () => {
                             onClick={() => {
                                 setVoucherValue('');
                                 setVoucher('');
+                                setShowMessage('');
                             }}
                         >
                             {_t('delete')}
                         </button>
                     )}
                 </div>
+                {showMessage && <p className="text-sm mt-2 text-[#666]">{showMessage}</p>}
             </div>
         </ClientOnly>
     );
diff --git a/shared/application/ui/hooks/useLocalCart.ts b/shared/application/ui/hooks/useLocalCart.ts
index 3d85c2f..501ffec 100644
--- a/shared/application/ui/hooks/useLocalCart.ts
+++ b/shared/application/ui/hooks/useLocalCart.ts
@@ -1,6 +1,8 @@
 'use client';
 import { useLocalStorage, writeStorage } from '@rehooks/local-storage';
 import { LocalCart } from '~/use-cases/contracts/LocalCart';
+import { ServiceAPI } from '~/use-cases/service-api';
+import { useAppContext } from '../app-context/provider';
 
 const InitializeEmptyLocalCart = (): LocalCart => {
     return {
@@ -18,6 +20,7 @@ export function useLocalCart() {
             ...cart,
         });
     };
+    const { state: appContextState } = useAppContext();
 
     const isImmutable = () => {
         return cart.state === 'placed';
@@ -106,5 +109,13 @@ export function useLocalCart() {
                 },
             });
         },
+        validateVoucher: async (voucher: string) => {
+            const api = ServiceAPI({
+                language: appContextState.language,
+                serviceApiUrl: appContextState.serviceApiUrl,
+            });
+
+            return await api.validateVoucher(voucher);
+        },
     };
 }
diff --git a/shared/application/use-cases/contracts/RemoteCart.ts b/shared/application/use-cases/contracts/RemoteCart.ts
index 5ce3496..dacc855 100644
--- a/shared/application/use-cases/contracts/RemoteCart.ts
+++ b/shared/application/use-cases/contracts/RemoteCart.ts
@@ -17,4 +17,14 @@ export type Cart = {
     };
     state: 'cart' | 'placed' | 'ordered';
     orderId?: string;
+    context?: {
+        price: {
+            markets?: string[];
+            decimals: number;
+            selectedVariantIdentifier: string;
+            fallbackVariantIdentifiers: string[];
+            compareAtVariantIdentifier: string;
+            voucherCode?: string;
+        };
+    };
 };
diff --git a/shared/application/use-cases/crystallize/read/validateVoucher.server.ts b/shared/application/use-cases/crystallize/read/validateVoucher.server.ts
new file mode 100644
index 0000000..9139128
--- /dev/null
+++ b/shared/application/use-cases/crystallize/read/validateVoucher.server.ts
@@ -0,0 +1,29 @@
+import type { ClientInterface } from '@crystallize/js-api-client';
+import { jsonToGraphQLQuery } from 'json-to-graphql-query';
+
+type Deps = {
+    apiClient: ClientInterface;
+};
+
+export const validateVoucher = async (voucher: string, { apiClient }: Deps) => {
+    const query = {
+        validateVoucher: {
+            __args: {
+                voucher,
+            },
+            isValid: true,
+        },
+    };
+
+    const rawQuery = jsonToGraphQLQuery({ query });
+
+    try {
+        const response = await apiClient.shopCartApi(rawQuery);
+        return response.validateVoucher.isValid;
+    } catch (exception: any) {
+        console.error('Failed to fetch cart', exception.message);
+        return {
+            valid: false,
+        };
+    }
+};
diff --git a/shared/application/use-cases/crystallize/write/editCart.ts b/shared/application/use-cases/crystallize/write/editCart.ts
index 7e7bfde..501c5bc 100644
--- a/shared/application/use-cases/crystallize/write/editCart.ts
+++ b/shared/application/use-cases/crystallize/write/editCart.ts
@@ -8,9 +8,10 @@ type Deps = {
 
 type Input = {
     items: Array<{ sku: string; quantity: number }>;
-    context: Record<string, unknown>;
+    context: Cart['context'];
     id?: string;
 };
+
 export const hydrateCart = async (
     items: Array<{ sku: string; quantity: number }>,
     { apiClient }: Deps,
diff --git a/shared/application/use-cases/service-api/index.ts b/shared/application/use-cases/service-api/index.ts
index 38ede3c..efb798e 100644
--- a/shared/application/use-cases/service-api/index.ts
+++ b/shared/application/use-cases/service-api/index.ts
@@ -108,6 +108,10 @@ export const ServiceAPI = ({ locale, language, serviceApiUrl }: ServiceAPIContex
                 withImages: true,
                 extra: cart.extra,
             }),
+        validateVoucher: (voucher: string) =>
+            postJson<any>(serviceApiUrl + '/cart/voucher', {
+                voucher,
+            }),
         // THIS SHOULD BE REMOVED IN A REAL PROJECT
         sendPaidOrderWithCrystalCoin: (cart: LocalCart, customer: Partial<Customer>) =>
             sendPaidOrderWithCrystalCoin(serviceApiUrl, language, cart, customer),