diff --git a/src/services/api/closing.ts b/src/services/api/closing.ts
new file mode 100644
index 00000000..6dab6f8d
--- /dev/null
+++ b/src/services/api/closing.ts
@@ -0,0 +1,163 @@
+import { BaseApiService } from './base';
+import { BaseApiResponse, CreatedUser } from '@/types/api/api-general';
+import { ClosingSales } from '@/types/api/closing/closing';
+import { sleep } from '@/lib/helper';
+
+const adminUser: CreatedUser = {
+  id: 1,
+  id_user: 1,
+  email: 'admin@example.com',
+  name: 'Admin User',
+};
+
+const DUMMY_SALES: ClosingSales[] = [
+  {
+    id: 1,
+    realization_date: '2025-01-15',
+    week_age: 4,
+    age_label: 'Week 4',
+    delivery_order_number: 'DO-2025-001',
+    product: {
+      id: 1,
+      name: 'Ayam Broiler',
+      brand: 'Brand A',
+      sku: 'AYM-001',
+      product_price: 20000,
+      selling_price: 25000,
+      tax: 10,
+      expiry_period: 30,
+      uom: {
+        id: 1,
+        name: 'Kg',
+        created_user: adminUser,
+        created_at: '2025-01-01T00:00:00Z',
+        updated_at: '2025-01-01T00:00:00Z',
+      },
+      product_category: {
+        id: 1,
+        code: 'LC001',
+        name: 'Live Chicken',
+        created_user: adminUser,
+        created_at: '2025-01-01T00:00:00Z',
+        updated_at: '2025-01-01T00:00:00Z',
+      },
+      suppliers: [],
+      flags: [],
+      created_user: adminUser,
+      created_at: '2025-01-01T00:00:00Z',
+      updated_at: '2025-01-01T00:00:00Z',
+    },
+    product_category: {
+      id: 1,
+      code: 'LC001',
+      name: 'Live Chicken',
+      created_user: adminUser,
+      created_at: '2025-01-01T00:00:00Z',
+      updated_at: '2025-01-01T00:00:00Z',
+    },
+    customer: {
+      id: 1,
+      name: 'PT. Bumi Mandiri',
+      pic_id: 1,
+      pic: adminUser,
+      type: 'COMPANY',
+      address: 'Jl. Industri No. 123',
+      phone: '+62-21-1234567',
+      email: 'info@bumimandiri.com',
+      account_number: '1234567890',
+      created_user: adminUser,
+      created_at: '2025-01-01T00:00:00Z',
+      updated_at: '2025-01-01T00:00:00Z',
+    },
+    quantity: 1000,
+    weight: 1850,
+    average: 1.85,
+    price: 25000,
+    total: 25000000,
+    kandang: {
+      id: 1,
+      name: 'Singaparna 1',
+      status: 'ACTIVE',
+      location: {
+        id: 1,
+        name: 'Singaparna',
+        address: 'Jl. Singaparna No. 1',
+        area: {
+          id: 1,
+          name: 'Tasikmalaya',
+          created_user: adminUser,
+          created_at: '2025-01-01T00:00:00Z',
+          updated_at: '2025-01-01T00:00:00Z',
+        },
+        created_user: adminUser,
+        created_at: '2025-01-01T00:00:00Z',
+        updated_at: '2025-01-01T00:00:00Z',
+      },
+      capacity: 1000,
+      pic: {
+        id: 1,
+        id_user: 1,
+        email: 'admin@example.com',
+        name: 'Admin User',
+      },
+      created_user: adminUser,
+      created_at: '2025-01-01T00:00:00Z',
+      updated_at: '2025-01-01T00:00:00Z',
+    },
+    kandang_id: 1,
+    payment_status: 'PAID',
+    created_user: adminUser,
+    created_at: '2025-01-15T10:00:00Z',
+    updated_at: '2025-01-15T10:00:00Z',
+  },
+];
+
+export class ClosingApiService extends BaseApiService<
+  ClosingSales,
+  unknown,
+  unknown
+> {
+  constructor(basePath: string = '') {
+    super(basePath);
+  }
+
+  async getPenjualan(
+    id: number
+  ): Promise<BaseApiResponse<ClosingSales> | undefined> {
+    try {
+      // TODO: Remove dummy data when real API is ready
+      await sleep(750);
+
+      const saleData = DUMMY_SALES.find((sale) => sale.id === id);
+
+      if (!saleData) {
+        return {
+          code: 404,
+          status: 'error',
+          message: 'Sales data not found!',
+        };
+      }
+
+      return {
+        code: 200,
+        status: 'success',
+        message: 'Successfully get sales data!',
+        meta: {
+          page: 1,
+          limit: 10,
+          total_pages: 1,
+          total_results: 1,
+        },
+        data: saleData,
+      };
+
+      // const getPenjualanPath = `${this.basePath}/${id}/penjualan`;
+      // return await this.customRequest<BaseApiResponse<ClosingSales>>(getPenjualanPath);
+    } catch (error) {
+      console.error('Error fetching penjualan:', error);
+      return undefined;
+    }
+  }
+}
+
+export const ClosingApi = new ClosingApiService('/closing');
diff --git a/src/types/api/closing/closing.d.ts b/src/types/api/closing/closing.d.ts
new file mode 100644
index 00000000..d4b94770
--- /dev/null
+++ b/src/types/api/closing/closing.d.ts
@@ -0,0 +1,26 @@
+import { BaseMetadata } from '@/types/api/api-general';
+import { Kandang } from '@type/api/master-data/kandang';
+import { Product } from '@type/api/master-data/product';
+import { ProductCategory } from '@type/api/master-data/product-category';
+import { Customer } from '@type/api/master-data/customer';
+
+export type BaseClosingSales = {
+  id: number;
+  realization_date: string;
+  week_age: number;
+  age_label: string;
+  delivery_order_number: string;
+  product: Product;
+  product_category: ProductCategory;
+  customer: Customer;
+  quantity: number;
+  weight: number;
+  average: number;
+  price: number;
+  total: number;
+  kandang: Kandang;
+  kandang_id: number;
+  payment_status: string;
+};
+
+export type ClosingSales = BaseMetadata & BaseClosingSales;