diff --git a/src/app/core/services/catalog/catalog.interface.ts b/src/app/core/services/catalog/catalog.interface.ts
index e586e42..4d8b4d3 100644
--- a/src/app/core/services/catalog/catalog.interface.ts
+++ b/src/app/core/services/catalog/catalog.interface.ts
@@ -66,7 +66,7 @@ export interface CatalogItemVariant {
   event_date_id?: number | null;
   event_date_ids?: number[];
   event_dates?: string[];
-  stock_tecnico: number | null;
+  maximum_addable_quantity?: number | null;
   minimum_use_date?: string | null;
   maximum_use_date?: string | null;
   effective_minimum_use_date?: string | null;
@@ -98,7 +98,7 @@ export interface CatalogItemDetail {
   attributes: ProductAttribute[];
   variants: CatalogItemVariant[];
   selected_variant?: SelectedCatalogItemVariant;
-  stock_tecnico?: number | null;
+  maximum_addable_quantity?: number | null;
   images?: string[];
 }
 
@@ -113,7 +113,7 @@ export interface CatalogFeaturedItemVariant {
   id: number;
   descripcion?: string | null;
   precio?: string;
-  stock_tecnico: number | null;
+  maximum_addable_quantity?: number | null;
   values: Record<string, CatalogVariantValue>;
 }
 
@@ -145,7 +145,7 @@ export interface CatalogFeaturedItem {
   descripcion?: string | null;
   precio: number | string;
   image?: string | null;
-  stock_tecnico?: number | null;
+  maximum_addable_quantity?: number | null;
   variants?: CatalogFeaturedItemVariant[];
 }
 
diff --git a/src/app/features/componentes-test/pages/reutilizables-test-page/reutilizables-test-page.component.ts b/src/app/features/componentes-test/pages/reutilizables-test-page/reutilizables-test-page.component.ts
index 594d44f..1e5e77e 100644
--- a/src/app/features/componentes-test/pages/reutilizables-test-page/reutilizables-test-page.component.ts
+++ b/src/app/features/componentes-test/pages/reutilizables-test-page/reutilizables-test-page.component.ts
@@ -232,7 +232,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1001,
         precio: 250000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('vip_lunch', 'VIP + Lunch'),
           sector: ticketOption('a', 'Sector A'),
@@ -243,7 +243,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1002,
         precio: 250000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('vip_lunch', 'VIP + Lunch'),
           sector: ticketOption('a', 'Sector A'),
@@ -254,7 +254,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1003,
         precio: 250000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('vip_lunch', 'VIP + Lunch'),
           sector: ticketOption('c', 'Sector C'),
@@ -265,7 +265,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1004,
         precio: 200000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('vip_lunch', 'VIP + Lunch'),
           sector: ticketOption('a', 'Sector A'),
@@ -276,7 +276,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1005,
         precio: 200000,
-        stock_tecnico: 0,
+        maximum_addable_quantity: 0,
         values: {
           tipo: ticketOption('vip_lunch', 'VIP + Lunch'),
           sector: ticketOption('a', 'Sector A'),
@@ -287,7 +287,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1006,
         precio: 100000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('general', 'General'),
           sector: ticketOption('b', 'Sector B'),
@@ -298,7 +298,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1007,
         precio: 100000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('general', 'General'),
           sector: ticketOption('b', 'Sector B'),
@@ -309,7 +309,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1008,
         precio: 90000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('general', 'General'),
           sector: ticketOption('d', 'Sector D'),
@@ -320,7 +320,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1009,
         precio: 65000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('general', 'General'),
           sector: ticketOption('d', 'Sector D'),
@@ -331,7 +331,7 @@ export class ReutilizablesTestPageComponent {
       {
         id: 1010,
         precio: 40000,
-        stock_tecnico: 1,
+        maximum_addable_quantity: 1,
         values: {
           tipo: ticketOption('general', 'General'),
           sector: ticketOption('d', 'Sector D'),
diff --git a/src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.spec.ts b/src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.spec.ts
index 4a7910c..c249803 100644
--- a/src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.spec.ts
+++ b/src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.spec.ts
@@ -31,7 +31,7 @@ describe('ProductAttributeSelectorComponent', () => {
     fixture.componentRef.setInput('variants', [
       {
         id: 1,
-        stock_tecnico: null,
+        maximum_addable_quantity: null,
         values: { size: 'S' },
       },
     ]);
@@ -51,12 +51,12 @@ describe('ProductAttributeSelectorComponent', () => {
     fixture.componentRef.setInput('variants', [
       {
         id: 1,
-        stock_tecnico: 0,
+        maximum_addable_quantity: 0,
         values: { size: 'S' },
       },
       {
         id: 2,
-        stock_tecnico: 2,
+        maximum_addable_quantity: 2,
         values: { size: 'M' },
       },
     ]);
@@ -92,9 +92,9 @@ describe('ProductAttributeSelectorComponent', () => {
     ]);
     fixture.componentRef.setInput('inventoryPolicy', 'unlimited');
     fixture.componentRef.setInput('variants', [
-      { id: 1, stock_tecnico: null, values: { event_date: '1' } },
-      { id: 2, stock_tecnico: null, values: { event_date: '2' } },
-      { id: 3, stock_tecnico: null, values: { event_date: ['1', '2'] } },
+      { id: 1, maximum_addable_quantity: null, values: { event_date: '1' } },
+      { id: 2, maximum_addable_quantity: null, values: { event_date: '2' } },
+      { id: 3, maximum_addable_quantity: null, values: { event_date: ['1', '2'] } },
     ]);
     fixture.detectChanges();
 
@@ -135,8 +135,8 @@ describe('ProductAttributeSelectorComponent', () => {
     ]);
     fixture.componentRef.setInput('inventoryPolicy', 'unlimited');
     fixture.componentRef.setInput('variants', [
-      { id: 1, stock_tecnico: null, values: { size: 'S', internal_type: 'adult' } },
-      { id: 2, stock_tecnico: null, values: { size: 'M', internal_type: 'child' } },
+      { id: 1, maximum_addable_quantity: null, values: { size: 'S', internal_type: 'adult' } },
+      { id: 2, maximum_addable_quantity: null, values: { size: 'M', internal_type: 'child' } },
     ]);
     fixture.detectChanges();
 
diff --git a/src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.ts b/src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.ts
index d856169..0308d57 100644
--- a/src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.ts
+++ b/src/app/features/store/components/product-attribute-selector/product-attribute-selector.component.ts
@@ -227,7 +227,7 @@ export class ProductAttributeSelectorComponent {
   }
 
   private isVariantAvailable(variant: CatalogItemVariant): boolean {
-    return this.inventoryPolicy() === 'unlimited' || (variant.stock_tecnico ?? 0) > 0;
+    return variant.maximum_addable_quantity !== 0;
   }
 
   private findFirstHexValue(value: unknown): string | null {
diff --git a/src/app/features/store/pages/product-detail-page/product-detail-page.component.spec.ts b/src/app/features/store/pages/product-detail-page/product-detail-page.component.spec.ts
index 9c25820..7796679 100644
--- a/src/app/features/store/pages/product-detail-page/product-detail-page.component.spec.ts
+++ b/src/app/features/store/pages/product-detail-page/product-detail-page.component.spec.ts
@@ -1,5 +1,6 @@
 import { TestBed, getTestBed } from '@angular/core/testing';
 import { signal } from '@angular/core';
+import { HttpErrorResponse } from '@angular/common/http';
 import { BrowserTestingModule, platformBrowserTesting } from '@angular/platform-browser/testing';
 import { ActivatedRoute, Router } from '@angular/router';
 import { By } from '@angular/platform-browser';
@@ -36,7 +37,7 @@ describe('ProductDetailPageComponent', () => {
     has_tickets: false,
     minimum_use_date: null,
     maximum_use_date: null,
-    stock_tecnico: 10,
+    maximum_addable_quantity: 10,
     attributes: [],
     variants: [],
   };
@@ -190,10 +191,10 @@ describe('ProductDetailPageComponent', () => {
     const detailProduct: CatalogItemDetail = {
       ...mockProduct,
       images: ['https://example.com/product.png'],
-      variants: [{ id: 123, stock_tecnico: 10, values: {} }],
+      variants: [{ id: 123, maximum_addable_quantity: 10, values: {} }],
       selected_variant: {
         id: 123,
-        stock_tecnico: 10,
+        maximum_addable_quantity: 10,
         images: ['https://example.com/variant1.png', 'https://example.com/variant2.png'],
         values: {},
       },
@@ -294,10 +295,12 @@ describe('ProductDetailPageComponent', () => {
           ],
         },
       ],
-      variants: [{ id: 123, stock_tecnico: 10, values: { color: 'beige', material: 'Cuero' } }],
+      variants: [
+        { id: 123, maximum_addable_quantity: 10, values: { color: 'beige', material: 'Cuero' } },
+      ],
       selected_variant: {
         id: 123,
-        stock_tecnico: 10,
+        maximum_addable_quantity: 10,
         images: ['https://example.com/variant1.png'],
         values: {
           color: 'beige',
@@ -334,8 +337,8 @@ describe('ProductDetailPageComponent', () => {
       purpose: 'entry',
       has_tickets: true,
       variants: [
-        { id: 101, event_date_id: 20, stock_tecnico: 10, values: { event_date: '20' } },
-        { id: 102, event_date_id: 21, stock_tecnico: 10, values: { event_date: '21' } },
+        { id: 101, event_date_id: 20, maximum_addable_quantity: 10, values: { event_date: '20' } },
+        { id: 102, event_date_id: 21, maximum_addable_quantity: 10, values: { event_date: '21' } },
       ],
       attributes: [
         {
@@ -366,7 +369,7 @@ describe('ProductDetailPageComponent', () => {
       selected_variant: {
         id: 101,
         event_date_id: 20,
-        stock_tecnico: 10,
+        maximum_addable_quantity: 10,
         images: [],
         values: {},
       },
@@ -410,7 +413,7 @@ describe('ProductDetailPageComponent', () => {
 
     fixture.componentInstance['selectedVariant'].set({
       id: 1,
-      stock_tecnico: 10,
+      maximum_addable_quantity: 10,
       values: {},
     });
     fixture.detectChanges();
@@ -493,19 +496,45 @@ describe('ProductDetailPageComponent', () => {
     });
   });
 
+  it('shows the backend purchase-limit message for a direct checkout', async () => {
+    checkoutServiceStub.startCheckout.mockRejectedValue(
+      new HttpErrorResponse({
+        status: 422,
+        error: {
+          code: 'purchase.limit_exceeded',
+          message: 'Podés agregar hasta 2 unidades más de “Auriculares Bluetooth”.',
+          maximum_addable_quantity: 2,
+        },
+      }),
+    );
+    await configureTestingModule();
+    const fixture = TestBed.createComponent(ProductDetailPageComponent);
+    fixture.detectChanges();
+    const buyButton = Array.from(fixture.nativeElement.querySelectorAll('app-button button')).find(
+      (button) => button.textContent?.trim() === 'Comprar',
+    ) as HTMLButtonElement;
+
+    buyButton.click();
+    await Promise.resolve();
+
+    expect(toastServiceStub.danger).toHaveBeenCalledWith(
+      'Podés agregar hasta 2 unidades más de “Auriculares Bluetooth”.',
+    );
+  });
+
   it('calls CartService.addItem when variant is selected and Add to Cart is clicked', async () => {
     const detailProduct: CatalogItemDetail = {
       ...mockProduct,
       variants: [
         {
           id: 123,
-          stock_tecnico: 5,
+          maximum_addable_quantity: 5,
           values: {},
         },
       ],
       selected_variant: {
         id: 123,
-        stock_tecnico: 5,
+        maximum_addable_quantity: 5,
         images: [],
         values: {},
       },
@@ -538,7 +567,7 @@ describe('ProductDetailPageComponent', () => {
     resolveProduct({
       ...mockProduct,
       variants: [],
-      stock_tecnico: 4,
+      maximum_addable_quantity: 4,
     });
 
     await configureTestingModule();
@@ -564,13 +593,13 @@ describe('ProductDetailPageComponent', () => {
       variants: [
         {
           id: 123,
-          stock_tecnico: 5,
+          maximum_addable_quantity: 5,
           values: {},
         },
       ],
       selected_variant: {
         id: 123,
-        stock_tecnico: 5,
+        maximum_addable_quantity: 5,
         images: [],
         values: {},
       },
@@ -602,7 +631,7 @@ describe('ProductDetailPageComponent', () => {
   it('allows unlimited variants to increase quantity without a maximum', async () => {
     const unlimitedVariant = {
       id: 321,
-      stock_tecnico: null,
+      maximum_addable_quantity: null,
       values: {},
     };
     resolveProduct({
@@ -610,7 +639,7 @@ describe('ProductDetailPageComponent', () => {
       inventory_policy: 'unlimited',
       selected_variant: {
         id: 321,
-        stock_tecnico: null,
+        maximum_addable_quantity: null,
         images: [],
         values: {},
       },
@@ -634,7 +663,7 @@ describe('ProductDetailPageComponent', () => {
   it('caps an unlimited variant at the per-user purchase limit', async () => {
     const unlimitedVariant = {
       id: 322,
-      stock_tecnico: null,
+      maximum_addable_quantity: 2,
       values: {},
     };
     resolveProduct({
@@ -643,7 +672,7 @@ describe('ProductDetailPageComponent', () => {
       max_units_per_user: 2,
       selected_variant: {
         id: 322,
-        stock_tecnico: null,
+        maximum_addable_quantity: 2,
         images: [],
         values: { event_date: '20' },
       },
@@ -667,14 +696,14 @@ describe('ProductDetailPageComponent', () => {
   it('disables purchase actions for tracked variants without stock', async () => {
     const trackedVariant = {
       id: 654,
-      stock_tecnico: 0,
+      maximum_addable_quantity: 0,
       values: {},
     };
     resolveProduct({
       ...mockProduct,
       selected_variant: {
         id: 654,
-        stock_tecnico: 0,
+        maximum_addable_quantity: 0,
         images: [],
         values: {},
       },
diff --git a/src/app/features/store/pages/product-detail-page/product-detail-page.component.ts b/src/app/features/store/pages/product-detail-page/product-detail-page.component.ts
index 254c760..831d7f3 100644
--- a/src/app/features/store/pages/product-detail-page/product-detail-page.component.ts
+++ b/src/app/features/store/pages/product-detail-page/product-detail-page.component.ts
@@ -98,27 +98,23 @@ export class ProductDetailPageComponent implements OnInit, OnDestroy {
     const variant = this.selectedVariant();
     if (!prod) return 0;
 
-    const stockLimit = variant
-      ? variant.stock_tecnico
+    return variant
+      ? (variant.maximum_addable_quantity ?? null)
       : prod.variants.length === 0
-        ? (prod.stock_tecnico ?? null)
+        ? (prod.maximum_addable_quantity ?? null)
         : 0;
-    const userLimit = prod.max_units_per_user ?? null;
-
-    if (stockLimit === null) return userLimit;
-    if (userLimit === null) return stockLimit;
-    return Math.min(stockLimit, userLimit);
   });
   protected readonly selectedVariantAvailable = computed(() => {
     const prod = this.product();
     if (!prod) return false;
+    if (this.selectedVariantMax() === 0) return false;
 
     const variant = this.selectedVariant();
-    if (variant) return this.isVariantAvailable(variant, prod);
+    if (variant) return this.isVariantAvailable(variant);
     if (prod.purpose === 'entry') return false;
     if (prod.variants.length > 0) return false;
 
-    return prod.inventory_policy === 'unlimited' || (prod.stock_tecnico ?? 0) > 0;
+    return this.selectedVariantMax() !== 0;
   });
   protected readonly descriptionExpanded = signal(false);
   protected readonly descriptionMaxHeight = signal(0);
@@ -333,14 +329,18 @@ export class ProductDetailPageComponent implements OnInit, OnDestroy {
       });
     } catch (error) {
       console.error('Failed to create direct purchase:', error);
-      this.toastService.danger('No se pudo iniciar la compra directa.');
+      const message =
+        error instanceof HttpErrorResponse && typeof error.error?.message === 'string'
+          ? error.error.message
+          : 'No se pudo iniciar la compra directa.';
+      this.toastService.danger(message);
     } finally {
       this.creatingDirectPurchase.set(false);
     }
   }
 
-  private isVariantAvailable(variant: CatalogItemVariant, product: CatalogItemDetail): boolean {
-    return product.inventory_policy === 'unlimited' || (variant.stock_tecnico ?? 0) > 0;
+  private isVariantAvailable(variant: CatalogItemVariant): boolean {
+    return variant.maximum_addable_quantity !== 0;
   }
 
   protected toggleDescription(): void {
diff --git a/src/app/features/store/pages/product-detail-page/product-detail-page.resolver.spec.ts b/src/app/features/store/pages/product-detail-page/product-detail-page.resolver.spec.ts
index d378c5f..cac7e4d 100644
--- a/src/app/features/store/pages/product-detail-page/product-detail-page.resolver.spec.ts
+++ b/src/app/features/store/pages/product-detail-page/product-detail-page.resolver.spec.ts
@@ -28,7 +28,7 @@ describe('productDetailResolver', () => {
     has_tickets: false,
     minimum_use_date: null,
     maximum_use_date: null,
-    stock_tecnico: 0,
+    maximum_addable_quantity: 0,
     attributes: [],
     variants: [],
   };
diff --git a/src/app/features/store/pages/store-home-page/store-home-page.component.ts b/src/app/features/store/pages/store-home-page/store-home-page.component.ts
index d0eb756..d4bf72b 100644
--- a/src/app/features/store/pages/store-home-page/store-home-page.component.ts
+++ b/src/app/features/store/pages/store-home-page/store-home-page.component.ts
@@ -224,6 +224,11 @@ export class StoreHomePageComponent implements OnInit, OnDestroy {
         return;
       }
 
+      if (error instanceof HttpErrorResponse && typeof error.error?.message === 'string') {
+        this.toastService.danger(error.error.message);
+        return;
+      }
+
       this.toastService.danger('No se pudo iniciar la compra directa.');
     } finally {
       this.creatingDirectPurchase.set(false);
diff --git a/src/app/shared/components/product-list/product-list.component.html b/src/app/shared/components/product-list/product-list.component.html
index 2e1d4a8..c181aba 100644
--- a/src/app/shared/components/product-list/product-list.component.html
+++ b/src/app/shared/components/product-list/product-list.component.html
@@ -12,6 +12,7 @@
           [title]="item.nombre"
           [description]="item.descripcion ?? ''"
           [price]="price(item)"
+          [maximumAddableQuantity]="item.maximum_addable_quantity ?? null"
           [variants]="item.variants ?? []"
           [saving]="savingProductIds().has(item.id)"
           (buy)="emitRowBuy(item, $event)"
@@ -23,6 +24,7 @@
           [title]="item.nombre"
           [description]="item.descripcion ?? ''"
           [price]="price(item)"
+          [maximumAddableQuantity]="item.maximum_addable_quantity ?? null"
           [variants]="item.variants ?? []"
           [saving]="savingProductIds().has(item.id)"
           (buy)="emitColumnBuy(item, $event)"
diff --git a/src/app/shared/components/product-list/product-list.component.spec.ts b/src/app/shared/components/product-list/product-list.component.spec.ts
index 20516d0..32ecc20 100644
--- a/src/app/shared/components/product-list/product-list.component.spec.ts
+++ b/src/app/shared/components/product-list/product-list.component.spec.ts
@@ -193,8 +193,8 @@ describe('ProductListComponent', () => {
     const itemWithVariants: ProductListItem = {
       ...items[0],
       variants: [
-        { id: 91, stock_tecnico: 3, values: { fecha: '10 de octubre' } },
-        { id: 92, stock_tecnico: 4, values: { fecha: '11 de octubre' } },
+        { id: 91, maximum_addable_quantity: 3, values: { fecha: '10 de octubre' } },
+        { id: 92, maximum_addable_quantity: 4, values: { fecha: '11 de octubre' } },
       ],
     };
     const fixture = await render('column_with_cart', [itemWithVariants]);
@@ -214,6 +214,58 @@ describe('ProductListComponent', () => {
     });
   });
 
+  it('caps the quantity at the selected variant maximum', async () => {
+    const itemWithVariants: ProductListItem = {
+      ...items[0],
+      variants: [
+        {
+          id: 91,
+          maximum_addable_quantity: 2,
+          values: { fecha: '10 de octubre' },
+        },
+      ],
+    };
+    const fixture = await render('column_with_cart', [itemWithVariants]);
+    await fixture.whenStable();
+    fixture.detectChanges();
+    const increase = fixture.nativeElement.querySelector(
+      '.quantity-selector__button:last-child',
+    ) as HTMLButtonElement;
+
+    increase.click();
+    fixture.detectChanges();
+
+    expect(
+      (fixture.nativeElement as HTMLElement).querySelector('.quantity-selector__value')
+        ?.textContent,
+    ).toContain('2');
+    expect(increase.disabled).toBe(true);
+  });
+
+  it('disables purchase actions when the selected variant maximum is zero', async () => {
+    const unavailableItem: ProductListItem = {
+      ...items[0],
+      variants: [
+        {
+          id: 91,
+          maximum_addable_quantity: 0,
+          values: { fecha: '10 de octubre' },
+        },
+      ],
+    };
+    const fixture = await render('row', [unavailableItem]);
+    await fixture.whenStable();
+    fixture.detectChanges();
+    const buttons = Array.from(
+      (fixture.nativeElement as HTMLElement).querySelectorAll<HTMLButtonElement>(
+        '.product-row-card__buttons button',
+      ),
+    );
+
+    expect(buttons).toHaveLength(2);
+    expect(buttons.every((button) => button.disabled)).toBe(true);
+  });
+
   it('renders pagination and emits the requested page', async () => {
     const fixture = await render('row');
     const pageChangeSpy = vi.fn();
@@ -252,7 +304,7 @@ describe('ProductListComponent', () => {
         {
           id: 401,
           precio: '10000.00',
-          stock_tecnico: 1,
+          maximum_addable_quantity: 1,
           values: {
             tipo: { value: 'vip', label: 'VIP' },
             sector: { value: 'a', label: 'Sector A' },
@@ -263,7 +315,7 @@ describe('ProductListComponent', () => {
         {
           id: 402,
           precio: '12000.00',
-          stock_tecnico: 1,
+          maximum_addable_quantity: 1,
           values: {
             tipo: { value: 'vip', label: 'VIP' },
             sector: { value: 'a', label: 'Sector A' },
diff --git a/src/app/shared/components/product-row-card/product-row-card.component.html b/src/app/shared/components/product-row-card/product-row-card.component.html
index dde80d0..7574dab 100644
--- a/src/app/shared/components/product-row-card/product-row-card.component.html
+++ b/src/app/shared/components/product-row-card/product-row-card.component.html
@@ -21,7 +21,11 @@
           [(selectedVariant)]="selectedVariant"
         />
 
-        <app-quantity-selector [(quantity)]="quantity"></app-quantity-selector>
+        <app-quantity-selector
+          [(quantity)]="quantity"
+          [max]="effectiveMaximum()"
+          [disabled]="unavailable()"
+        />
       </div>
 
       <span class="product-row-card__price text-primary">
@@ -31,10 +35,16 @@
 
     <div class="product-row-card__buttons">
       <div class="product-row-card__btn-wrapper">
-        <app-button variant="primary" (click)="onBuy()"> Comprar </app-button>
+        <app-button variant="primary" [disabled]="unavailable()" (click)="onBuy()">
+          Comprar
+        </app-button>
       </div>
       <div class="product-row-card__btn-wrapper">
-        <app-button variant="secondary" [disabled]="saving()" (click)="onAddToCart()">
+        <app-button
+          variant="secondary"
+          [disabled]="saving() || unavailable()"
+          (click)="onAddToCart()"
+        >
           {{ saving() ? 'Guardando' : 'Agregar al carrito' }}
         </app-button>
       </div>
diff --git a/src/app/shared/components/product-row-card/product-row-card.component.ts b/src/app/shared/components/product-row-card/product-row-card.component.ts
index d9de24d..59dd265 100644
--- a/src/app/shared/components/product-row-card/product-row-card.component.ts
+++ b/src/app/shared/components/product-row-card/product-row-card.component.ts
@@ -1,4 +1,12 @@
-import { ChangeDetectionStrategy, Component, computed, input, model, output } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  computed,
+  effect,
+  input,
+  model,
+  output,
+} from '@angular/core';
 import { ButtonComponent } from '../button/button.component';
 import { QuantitySelectorComponent } from '../quantity-selector/quantity-selector.component';
 import {
@@ -10,7 +18,7 @@ export interface Variant extends VariantSelectorVariant {
   label?: string;
   descripcion?: string | null;
   precio?: string | number;
-  stock_tecnico?: number | null;
+  maximum_addable_quantity?: number | null;
 }
 
 @Component({
@@ -26,6 +34,7 @@ export class ProductRowCardComponent {
   readonly title = input<string>('');
   readonly description = input<string>('');
   readonly price = input<number>(0);
+  readonly maximumAddableQuantity = input<number | null>(null);
   readonly variants = input<Variant[]>([]);
   readonly saving = input(false);
 
@@ -48,11 +57,25 @@ export class ProductRowCardComponent {
 
     return Number.isFinite(variantPrice) ? variantPrice : this.price();
   });
+  protected readonly effectiveMaximum = computed(
+    () => this.selectedVariantData()?.maximum_addable_quantity ?? this.maximumAddableQuantity(),
+  );
+  protected readonly unavailable = computed(() => this.effectiveMaximum() === 0);
 
   readonly formattedPrice = computed(() => this.formatCurrency(this.effectivePrice()));
 
+  constructor() {
+    effect(() => {
+      const maximum = this.effectiveMaximum();
+
+      if (maximum !== null && maximum > 0 && this.quantity() > maximum) {
+        this.quantity.set(maximum);
+      }
+    });
+  }
+
   protected onAddToCart(): void {
-    if (this.saving()) {
+    if (this.saving() || this.unavailable()) {
       return;
     }
 
@@ -63,6 +86,8 @@ export class ProductRowCardComponent {
   }
 
   protected onBuy(): void {
+    if (this.unavailable()) return;
+
     this.buy.emit({
       quantity: this.quantity(),
       variant: this.selectedVariant(),
diff --git a/src/app/shared/components/product-ticket-selector/product-ticket-selector.component.ts b/src/app/shared/components/product-ticket-selector/product-ticket-selector.component.ts
index 5803f48..e643317 100644
--- a/src/app/shared/components/product-ticket-selector/product-ticket-selector.component.ts
+++ b/src/app/shared/components/product-ticket-selector/product-ticket-selector.component.ts
@@ -361,7 +361,7 @@ export class ProductTicketSelectorComponent {
     return {
       id: item.variant.id,
       precio: item.variant.precio,
-      stock_tecnico: item.variant.stock_tecnico,
+      maximum_addable_quantity: item.variant.stock_tecnico,
       values: item.variant.values,
     };
   }
diff --git a/src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.html b/src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.html
index 4d53809..84c28f8 100644
--- a/src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.html
+++ b/src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.html
@@ -11,13 +11,21 @@
     @if (!hasVariants()) {
       <div class="product-vertical-with-cart-card__summary">
         <span class="product-vertical-with-cart-card__price">{{ formattedPrice() }}</span>
-        <app-quantity-selector [(quantity)]="quantity" />
+        <app-quantity-selector
+          [(quantity)]="quantity"
+          [max]="effectiveMaximum()"
+          [disabled]="unavailable()"
+        />
       </div>
     } @else {
       <div class="product-vertical-with-cart-card__variants">
         <div class="product-vertical-with-cart-card__summary">
           <span class="product-vertical-with-cart-card__price">{{ formattedPrice() }}</span>
-          <app-quantity-selector [(quantity)]="quantity" />
+          <app-quantity-selector
+            [(quantity)]="quantity"
+            [max]="effectiveMaximum()"
+            [disabled]="unavailable()"
+          />
         </div>
 
         <div class="product-vertical-with-cart-card__variant-selectors">
@@ -29,14 +37,14 @@
     <div class="product-vertical-with-cart-card__actions">
       <app-button
         variant="primary"
-        [disabled]="hasVariants() && selectedVariant() === null"
+        [disabled]="unavailable() || (hasVariants() && selectedVariant() === null)"
         (click)="onBuy()"
       >
         Comprar
       </app-button>
       <app-button
         variant="secondary"
-        [disabled]="saving() || (hasVariants() && selectedVariant() === null)"
+        [disabled]="saving() || unavailable() || (hasVariants() && selectedVariant() === null)"
         (click)="onAddToCart()"
       >
         {{ saving() ? 'Guardando' : 'Agregar al carrito' }}
diff --git a/src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.ts b/src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.ts
index f1804fd..e904c64 100644
--- a/src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.ts
+++ b/src/app/shared/components/product-vertical-with-cart-card/product-vertical-with-cart-card.component.ts
@@ -1,4 +1,12 @@
-import { ChangeDetectionStrategy, Component, computed, input, model, output } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  computed,
+  effect,
+  input,
+  model,
+  output,
+} from '@angular/core';
 
 import { ButtonComponent } from '../button/button.component';
 import { QuantitySelectorComponent } from '../quantity-selector/quantity-selector.component';
@@ -10,6 +18,7 @@ import {
 export interface VerticalCartVariant extends VariantSelectorVariant {
   descripcion?: string | null;
   precio?: string | number;
+  maximum_addable_quantity?: number | null;
 }
 
 @Component({
@@ -23,6 +32,7 @@ export class ProductVerticalWithCartCardComponent {
   readonly title = input<string>('');
   readonly description = input<string>('');
   readonly price = input<number>(0);
+  readonly maximumAddableQuantity = input<number | null>(null);
   readonly variants = input<VerticalCartVariant[]>([]);
   readonly saving = input(false);
 
@@ -45,9 +55,23 @@ export class ProductVerticalWithCartCardComponent {
   });
   protected readonly formattedPrice = computed(() => this.formatCurrency(this.effectivePrice()));
   protected readonly hasVariants = computed(() => this.variants().length > 0);
+  protected readonly effectiveMaximum = computed(
+    () => this.selectedVariantData()?.maximum_addable_quantity ?? this.maximumAddableQuantity(),
+  );
+  protected readonly unavailable = computed(() => this.effectiveMaximum() === 0);
+
+  constructor() {
+    effect(() => {
+      const maximum = this.effectiveMaximum();
+
+      if (maximum !== null && maximum > 0 && this.quantity() > maximum) {
+        this.quantity.set(maximum);
+      }
+    });
+  }
 
   protected onAddToCart(): void {
-    if (this.saving()) {
+    if (this.saving() || this.unavailable()) {
       return;
     }
 
@@ -55,6 +79,8 @@ export class ProductVerticalWithCartCardComponent {
   }
 
   protected onBuy(): void {
+    if (this.unavailable()) return;
+
     this.buy.emit({ quantity: this.quantity(), variant: this.selectedVariant() });
   }