---
title: POS
description: |2-
The POS API provides the ability to retrieve POS user, device, and location data, while also interacting with the cart and closing the app.
> Tip:
> It is recommended to use POS UI extensions for your development needs as they provide a faster, more robust, and easier to use solution for merchants using apps on POS. To learn more about the benefits and implementation details, refer to [POS UI Extensions](/docs/apps/pos/ui-extensions).
api_name: app-home
source_url:
html: 'https://shopify.dev/docs/api/app-home/apis/pos'
md: 'https://shopify.dev/docs/api/app-home/apis/pos.md'
---
# POS
The POS API provides the ability to retrieve POS user, device, and location data, while also interacting with the cart and closing the app.
**Tip:** It is recommended to use POS UI extensions for your development needs as they provide a faster, more robust, and easier to use solution for merchants using apps on POS. To learn more about the benefits and implementation details, refer to \POS UI Extensions\.
## Cart
Retrieve cart data and perform actions.
* **addAddress**
**(address: Address) => Promise\**
Add a new address to a customer.
* **addCartProperties**
**(properties: Record\) => Promise\**
Add properties for the cart.
* **addCustomSale**
**(customSale: CustomSale) => Promise\**
Add custom sale for the cart.
* **addLineItem**
**(variantId: number, quantity: number) => Promise\**
Add a product to the cart.
* **addLineItemProperties**
**(uuid: string, properties: Record\) => Promise\**
Add properties to a line item.
* **applyCartCodeDiscount**
**(code: string) => Promise\**
Apply a code discount to the whole cart.
* **applyCartDiscount**
**(type: DiscountType, discountDescription: string, amount: string) => Promise\**
Apply a percentage or fixed amount discount to the whole cart.
* **clear**
**() => Promise\**
Clear all contents from the cart.
* **fetch**
**() => Promise\**
Fetch the current cart.
* **removeAllDiscounts**
**(disableAutomaticDiscounts: boolean) => Promise\**
Clears all applied discounts from the cart and optionally disables automatic discounts.
* **removeCartDiscount**
**() => Promise\**
Remove the discount applied to the whole cart.
* **removeCartProperties**
**(keys: string\[]) => Promise\**
Remove properties from the cart.
* **removeCustomer**
**() => Promise\**
Remove the current customer from the cart.
* **removeLineItem**
**(uuid: string) => Promise\**
Remove a line item in the cart.
* **removeLineItemDiscount**
**(uuid: string) => Promise\**
Remove a discount from a line item.
* **removeLineItemProperties**
**(uuid: string, properties: string\[]) => Promise\**
Remove properties from a line item.
* **setCustomer**
**(customer: Customer) => Promise\**
Add a new or existing customer to the cart.
* **setLineItemDiscount**
**(uuid: string, type: DiscountType, discountDescription: string, amount: string) => Promise\**
Apply a discount to a line item.
* **subscribe**
**(onSubscribe: CartSubscriber) => Unsubscribe**
Subscribe the cart changes.
* **updateAddress**
**(index: number, address: Address) => Promise\**
Update an address for a customer.
* **updateLineItem**
**(uuid: string, quantity: number) => Promise\**
Make changes to a line item in the cart.
### Address
* address1
The customer's primary address.
```ts
string
```
* address2
Any extra information associated with the address (Apartment #, Suite #, Unit #, etc.).
```ts
string
```
* city
The name of the customer's city.
```ts
string
```
* company
The company name associated with address.
```ts
string
```
* country
The country of the address.
```ts
string
```
* countryCode
The Country Code in ISO 3166-1 (alpha-2) format.
```ts
string
```
* firstName
The first name of the customer.
```ts
string
```
* lastName
The last name of the customer.
```ts
string
```
* name
The name of the address.
```ts
string
```
* phone
The phone number of the customer.
```ts
string
```
* province
The province or state of the address.
```ts
string
```
* provinceCode
The acronym of the province or state.
```ts
string
```
* zip
The ZIP or postal code of the address.
```ts
string
```
### CustomSale
* price
Price of line item
```ts
number
```
* quantity
Quantity of line item.
```ts
number
```
* taxable
If line item charges tax.
```ts
boolean
```
* title
Title of line item.
```ts
string
```
### DiscountType
```ts
'Percentage' | 'FixedAmount'
```
### Cart
* cartDiscount
The current discount applied to the entire cart.
```ts
Discount
```
* cartDiscounts
All current discounts applied to the entire cart and line items.
```ts
Discount[]
```
* customer
The customer associated to the current cart.
```ts
Customer
```
* grandTotal
The total cost of the current cart, after taxes and discounts have been applied. Value is based on the shop's existing currency settings.
```ts
string
```
* lineItems
A list of lineItem objects.
```ts
LineItem[]
```
* properties
A list of objects containing cart properties.
```ts
Record
```
* subTotal
The total cost of the current cart including discounts, but before taxes and shipping. Value is based on the shop's existing currency settings.
```ts
string
```
* taxTotal
The sum of taxes for the current cart. Value is based on the shop's existing currency settings.
```ts
string
```
### Discount
* amount
Amount of discount. Only for fixed or percentage discounts.
```ts
number
```
* discountDescription
Description of discount.
```ts
string
```
* type
Type of discount.
```ts
DiscountType
```
### Customer
* email
The email for a new customer.
```ts
string
```
* firstName
The first name for new customer.
```ts
string
```
* id
The ID of existing customer.
```ts
number
```
* lastName
The last name for new customer.
```ts
string
```
* note
The note for new customer.
```ts
string
```
### LineItem
* discounts
Discount applied to line item.
```ts
Discount[]
```
* isGiftCard
If the line item is a gift card.
```ts
boolean
```
* price
Price of line item
```ts
number
```
* productId
Product identifier for line item.
```ts
number
```
* properties
Properties of the line item.
```ts
{ [key: string]: string; }
```
* quantity
Quantity of line item.
```ts
number
```
* sku
Stock keeping unit of the line item.
```ts
string
```
* taxable
If line item charges tax.
```ts
boolean
```
* title
Title of line item.
```ts
string
```
* uuid
Unique id of line item
```ts
string
```
* variantId
Variant identifier for line item.
```ts
number
```
* vendor
Vendor of line item.
```ts
string
```
### CartSubscriber
Callback to execute when cart updates.
* cart
```ts
Cart
```
void
```ts
void
```
### Unsubscribe
Callback to unsubscribe
void
```ts
void
```
## Close()
Close the app
### Returns
* **Promise\**
## Device()
Retrieve device data
### Returns
* **Promise\**
### Device
* name
The name of the device.
```ts
string
```
* serialNumber
The unique ID associated device ID and app ID..
```ts
string
```
## Location()
Retrieve location data
### Returns
* **Promise\**
### Location
* active
The status of current location.
```ts
boolean
```
* address1
The primary address of current location.
```ts
string
```
* address2
Any extra information associated with the address (Apartment #, Suite #, Unit #, etc.).
```ts
string
```
* city
The name of the city.
```ts
string
```
* countryCode
The Country Code in ISO 3166-1 (alpha-2) format.
```ts
string
```
* countryName
The country of the address.
```ts
string
```
* id
The ID of current location.
```ts
number
```
* locationType
The type of current location.
```ts
string
```
* name
The name of current location.
```ts
string
```
* phone
The phone number of the location.
```ts
string
```
* province
TThe province or state of the address.
```ts
string
```
* zip
The ZIP or postal code of the address.
```ts
string
```
## User()
Refer to the [user API](https://shopify.dev/docs/api/app-bridge-library/apis/user) to learn more about retrieving POS user data.
### Returns
* **Promise\**
### POSUser
* accountAccess
The account access level of the logged-in user
```ts
string
```
* accountType
The user's account type.
```ts
string
```
* email
The user's email address.
```ts
string
```
* firstName
The user's first name.
```ts
string
```
* id
The ID of the user's staff.
```ts
number
```
* lastName
The user's last name.
```ts
string
```
Examples
## Preview
### Examples
* #### Fetch the POS cart
##### Default
```js
await shopify.pos.cart.fetch();
```
* #### Fetch the cart
##### Default
```js
await shopify.pos.cart.fetch();
```
* #### Subscribe to cart updates
##### Default
```js
await shopify.pos.cart.subscribe((cart) => {
console.log(cart);
});
```
* #### Clear the cart
##### Default
```js
await shopify.pos.cart.clear();
```
* #### Line Items
##### Add line item
```js
await shopify.pos.cart.addLineItem(40202439393345, 10);
```
##### Update line item
```js
const cart = await shopify.pos.cart.fetch();
const lineItemUuid = cart.lineItems[0].uuid;
await shopify.pos.cart.updateLineItem(lineItemUuid, 4);
```
##### Remove line item
```js
const cart = await shopify.pos.cart.fetch();
const lineItemUuid = cart.lineItems[0].uuid;
await shopify.pos.cart.removeLineItem(lineItemUuid);
```
* #### Custom Sale
##### Add custom sale
```js
await shopify.pos.cart.addCustomSale({
price: 10,
quantity: 1,
title: 'Custom sale',
taxable: true,
});
```
* #### Customers
##### Add a customer by email
```js
await shopify.pos.cart.setCustomer({
email: 'foo@shopify.com',
firstName: 'Jane',
lastName: 'Doe',
note: 'Customer note',
});
```
##### Add a customer by id
```js
await shopify.pos.cart.setCustomer({
id: 5945486803009,
note: 'Customer note',
});
```
##### Remove customer
```js
await shopify.pos.cart.removeCustomer();
```
##### Add a customer address
```js
await shopify.pos.cart.addAddress({
address1: '123 Cherry St.',
address2: 'Apt. 5',
city: 'Toronto',
company: 'Shopify',
firstName: 'Foo',
lastName: 'Bar',
phone: '(613) 555-5555',
province: 'Ontario',
country: 'Canada',
zip: 'M5V0G4',
name: 'Shopify',
provinceCode: 'M5V0G4',
countryCode: '1',
});
```
##### Update customer address
```js
await shopify.pos.cart.updateAddress(0, {
address1: '555 Apple St.',
address2: 'Unit. 10',
city: 'Vancouver',
company: 'Shopify',
firstName: 'Jane',
lastName: 'Doe',
phone: '(403) 555-5555',
province: 'British Columbia',
country: 'Canada',
zip: 'M5V0G4',
name: 'Shopify',
provinceCode: 'M5V0G4',
countryCode: '2',
});
```
* #### Addresses
##### Add a customer address
```js
await shopify.pos.cart.addAddress({
address1: '123 Cherry St.',
address2: 'Apt. 5',
city: 'Toronto',
company: 'Shopify',
firstName: 'Foo',
lastName: 'Bar',
phone: '(613) 555-5555',
province: 'Ontario',
country: 'Canada',
zip: 'M5V0G4',
name: 'Shopify',
provinceCode: 'M5V0G4',
countryCode: '1',
});
```
##### Update customer address
```js
await shopify.pos.cart.updateAddress(0, {
address1: '555 Apple St.',
address2: 'Unit. 10',
city: 'Vancouver',
company: 'Shopify',
firstName: 'Jane',
lastName: 'Doe',
phone: '(403) 555-5555',
province: 'British Columbia',
country: 'Canada',
zip: 'M5V0G4',
name: 'Shopify',
provinceCode: 'M5V0G4',
countryCode: '2',
});
```
* #### Cart Discounts
##### Add cart discount
```js
await shopify.pos.cart.applyCartDiscount('FixedAmount', 'Holiday sale', '10');
```
##### Add dicount code
```js
await shopify.pos.cart.applyCartCodeDiscount('HOLIDAY SALE');
```
##### Remove cart discount
```js
await shopify.pos.cart.removeCartDiscount();
```
##### Remove all discounts with automatic discounts disabled
```js
await shopify.pos.cart.removeAllDiscounts(true);
```
* #### Line Item Discounts
##### Add line item discount
```js
const cart = await shopify.pos.cart.fetch();
const lineItemUuid = cart.lineItems[0].uuid;
await shopify.pos.cart.setLineItemDiscount(
lineItemUuid,
'Percentage',
'Holiday sale',
'0.5',
);
```
##### Remove line item discount
```js
const cart = await shopify.pos.cart.fetch();
const lineItemUuid = cart.lineItems[0].uuid;
await shopify.pos.cart.removeLineItemDiscount(lineItemUuid);
```
* #### Cart Properties
##### Add cart properties
```js
await shopify.pos.cart.addCartProperties({
referral: 'Shopify',
employee: '472',
});
```
##### Remove cart properties
```js
await shopify.pos.cart.removeCartProperties(['referral', 'employee']);
```
##### Add line item properties
```js
const cart = await shopify.pos.cart.fetch();
const lineItemUuid = cart.lineItems[0].uuid;
await shopify.pos.cart.addLineItemProperties(lineItemUuid, {
referral: 'Shopify',
employee: '472',
});
```
##### Remove line item properties
```js
const cart = await shopify.pos.cart.fetch();
const lineItemUuid = cart.lineItems[0].uuid;
await shopify.pos.cart.removeLineItemProperties(lineItemUuid, [
'referral',
'employee',
]);
```
* #### Line Item Properties
##### Add line item properties
```js
const cart = await shopify.pos.cart.fetch();
const lineItemUuid = cart.lineItems[0].uuid;
await shopify.pos.cart.addLineItemProperties(lineItemUuid, {
referral: 'Shopify',
employee: '472',
});
```
##### Remove line item properties
```js
const cart = await shopify.pos.cart.fetch();
const lineItemUuid = cart.lineItems[0].uuid;
await shopify.pos.cart.removeLineItemProperties(lineItemUuid, [
'referral',
'employee',
]);
```
* #### Dismiss the screen
##### Default
```js
await shopify.pos.close();
```
* #### Retrieve POS device data
##### Default
```js
await shopify.pos.device();
```
* #### Retrieve POS location data
##### Default
```js
await shopify.pos.location();
```