How To Add Simple Products By Using GraphQL in Cart in Magento 2.x / Adobe Commerce 2.x

Use the updateCartItems mutation to update shopping cart items and removeItemFromCart to remove a product from the shopping cart.

The following below steps need to follow to add products by using GraphQL in Magento 2.x

Step [1] – Recommendation to use below Simple Product syntax

Here Using Postman

Syntax –

mutation {
  addSimpleProductsToCart(input: AddSimpleProductsToCartInput): {
    AddSimpleProductsToCartOutput
  }
}

Step [2] – Put below Request

mutation {
  addSimpleProductsToCart(
    input: {
      cart_id: "s6Wgi4j0H2ULX0YHfD3mhOMHuAL10qLL"
      cart_items: [
        {
          data: {
            quantity: 1
            sku: "24-UB02"
          }
        }
      ]
    }
  ) {
    cart {
      items {
        id
        product {
          sku
          stock_status
        }
        quantity
      }
    }
  }
}

Step [3] – Below output response

{
    "data": {
        "addSimpleProductsToCart": {
            "cart": {
                "items": [
                    {
                        "id": "124",
                        "product": {
                            "sku": "24-UB02",
                            "stock_status": "IN_STOCK"
                        },
                        "quantity": 1
                    }
                ]
            }
        }
    }
}

_{Product added in quote_item database table with SKU = 24-UB02}