# Cart Custom Properties

You can enable a mini cart view in the following requests to show changes to the cart immediately. Find out more in the [views-for-cart-modifying-operations](https://dev.ucommerce.net/readme/headless/reference/views-for-cart-modifying-operations "mention")

## Prerequisites

* `access_token` from [headless-api-authentication](https://dev.ucommerce.net/readme/headless/headless-api-authentication "mention")
* `cartId` from [#create-a-cart](https://dev.ucommerce.net/readme/headless/cart#create-a-cart "mention")
* `cultureCode`, e.g. `en-US` (string)
* `priceGroupId` from the cart or from [price-groups](https://dev.ucommerce.net/readme/headless/reference/price-groups "mention")

## Add Custom Properties to Cart

### Parameters

* `key` the unique key of the property (string)
* `value` the value of the property (string)

### Request

```bash
curl -D- -X POST <base_url>/api/v1/carts/<cartId>/properties \
    -H 'Authorization: Bearer <ACCESS_TOKEN>'
    -H 'Content-Type: application/json' \
    -d '{
        "cultureCode": "<cultureCode>",
        "priceGroupId": "<priceGroupId>",
        "key": "<key>",
        "value": "<value>"
    }'
```

### Response

<pre class="language-json"><code class="lang-json">{
<strong>    "miniCart": null,
</strong>    "success": true
}
</code></pre>

## Delete Custom Property from Cart

### Parameters

* `propertyId` from [#add-custom-properties-to-cart](#add-custom-properties-to-cart "mention") or [#get-custom-properties-for-cart](#get-custom-properties-for-cart "mention")

### Request

```bash
curl -D- -X DELETE <base_url>/api/v1/carts/<cartId>/properties/<propertyId> \
    -H 'Authorization: Bearer <ACCESS_TOKEN>'
    -H 'Content-Type: application/json' \
    -d '{
        "cultureCode": "<cultureCode>",
        "priceGroupId": "<priceGroupId>",
    }'
```

### Response

```json
{
    "miniCart": null,
    "success": true
}
```

## Get Custom Properties for Cart

### Request

```bash
curl -D- -X GET <base_url>/api/v1/carts/<cartId>/properties \
    -H 'Authorization: Bearer <ACCESS_TOKEN>'
    -H 'Content-Type: application/json' \
```

### Response

```json
{
    "customProperties":
        [
            {
                "id" : "{id}",
                "key" : "{key}",
                "value" : "{value}",
            }
        ]
}
```

## Update Custom Properties for Cart

### Parameters

* `propertyId` from [#add-custom-properties-to-cart](#add-custom-properties-to-cart "mention") or [#get-custom-properties-for-cart](#get-custom-properties-for-cart "mention")
* `value` new value for the property (string)

### Request

```bash
curl -D- -X PATCH <base_url>/api/v1/carts/<cartId>/properties/<propertyId> \
    -H 'Authorization: Bearer <ACCESS_TOKEN>'
    -H 'Content-Type: application/json' \
    -d '{
        "cultureCode": "<cultureCode>",
        "priceGroupId": "<priceGroupId>",
        "value": "<value>"
    }'
```

### Response

```json
{
    "miniCart": null,
    "success": true
}
```

## Error Handling

| Error              | Description                                                                             |
| ------------------ | --------------------------------------------------------------------------------------- |
| BadRequest (400)   | Execution of the pipeline fails; Price group is not found; AccessToken is not attached. |
| Unauthorized (401) | The token is expired.                                                                   |
| Forbidden (403)    | The token does not have access to this endpoint.                                        |
| NotFound (404)     | Cart or Property not found.                                                             |
| Conflict (409)     | Property already exists on the order.                                                   |

Error Response Example

```json
{
"errors":
    [
        {
            "error-description": "Property not found.",
            "error": "NotFound"
        }
    ]
}
```

## Related Articles

{% content-ref url="../error-handling" %}
[error-handling](https://dev.ucommerce.net/readme/headless/error-handling)
{% endcontent-ref %}