# Extra customer data

Some activities in the Musement catalog require [extra customer data](/api/catalog/activities/extra-customer-data-and-participant-info), additional mandatory information that the cart customer (aka *lead booker*) needs to provide.

While each activity provides a preview of extra customer data at `/activities/{'{'}activityUuid}/extra-customer-data/schema`, the requested info may change for cart items. The definitive extra customer data appears in the same endpoint used for getting [lead booker information](/api/booking-flow/customer/lead-booker):


```bash
curl -X GET '{baseUrl}/carts/{cartUuid}/customer/schema' \
-H 'X-Musement-Application: {applicationValue}' \
-H 'X-Musement-Version: 3.4.0' \
-H 'Authorization: Bearer {accessToken}'
```

Activities with extra customer data will appear in a dedicated `extra_customer_data` property in the response:


```json
[...]
{
	"title": "cart_customer_guest",
	"type": "object",
	"properties": {
		[...]
		"extra_customer_data": {
			"title": "extra_customer_data",
			"type": "object",
			"properties": {
				"1714c6a7-2046-11e7-9cc9-06a7e332783f": {
					"title": "1714c6a7-2046-11e7-9cc9-06a7e332783f",
					"type": "object",
					"properties": {
						"phone_number": {
							"type": "number",
							"title": "Phone number",
							"propertyOrder": 1
						}
					},
					"required": [
						"phone_number"
					],
					"propertyOrder": 1
				}
			},
			"required": [
				"1714c6a7-2046-11e7-9cc9-06a7e332783f"
			],
			"propertyOrder": 12
		}
	},
	"required": [
		"firstname",
		"lastname",
		"email",
		"musement_newsletter",
		"allow_profiling",
		"thirdparty_newsletter",
		"events_related_newsletter",
		"extra_customer_data"
	]
}
```

The `extra_customer_data` property follows the same [JSON schema](https://json-schema.org/) as the rest of the response and may request multiple details.

p
The extra customer data can be submitted to the cart via the `/carts/{'{'}cartUuid}/customer` endpoint, either together with the lead booker information or separately:


```bash
curl -X PUT '{baseUrl}/carts/{cartUuid}/customer' \
-H 'X-Musement-Application: {applicationValue}' \
-H 'X-Musement-Version: 3.4.0' \
-H 'Authorization: Bearer {accessToken}' \
-H 'Content-Type: application/json' \
--data-raw '{
	"extra_customer_data": {
		"1714c6a7-2046-11e7-9cc9-06a7e332783f": {
			"phone_number": "1234567890"
		}
	}
}'
```

When multiple activities in the cart require extra customer data, follow the lead booker JSON schema and include data for all the relevant activities in the request:


```bash
curl -X PUT '{baseUrl}/carts/{cartUuid}/customer' \
-H 'X-Musement-Application: {applicationValue}' \
-H 'X-Musement-Version: 3.4.0' \
-H 'Authorization: Bearer {accessToken}' \
-H 'Content-Type: application/json' \
--data-raw '{
	"extra_customer_data": {
		"1714c6a7-2046-11e7-9cc9-06a7e332783f": {
			"phone_number": "1234567890"
		},
		"165fcd4d-2046-11e7-9cc9-06a7e332783f": {
			"go_kart_color": "red"
		}
	}
}'
```