> For the complete documentation index, see [llms.txt](https://docs.planetcrust.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.planetcrust.com/shopify/shopify/action-add-line-item-to-order.md).
# Action: Add Line Item to Order
Shopify Operation
The Add Line Item to Order action adds a new product or service (line item) to an existing order.
{% embed url="" %}
#### Example User Story
I want to add a free gift to a customer's order after they've already checked out, so I can surprise and delight them.
#### Fields
| Field Name | Field Type | Required |
| ---------------- | ---------- | -------- |
| orderId | String | Yes |
| variantId | String | Yes |
| quantity | Integer | Yes |
| customAttributes | Map | No |
### Related Connections
[Shopify](/shopify/shopify.md)
### Related Automations
Example link
### Code (Apache v2.0): Operation
```
{
"handle": "add-line-item-to-order",
"state": "inDev",
"meta": {
"short": "Add Line Item to Order",
"description": "Adds a line item to an existing Shopify order."
},
"input": [
{
"name": "orderId",
"type": "String",
"required": true,
"meta": {
"description": "The ID of the order to which the line item will be added."
}
},
{
"name": "variantId",
"type": "String",
"required": true,
"meta": {
"description": "The ID of the product variant to add to the order."
}
},
{
"name": "quantity",
"type": "Integer",
"required": true,
"meta": {
"description": "The quantity of the product variant to add."
}
},
{
"name": "customAttributes",
"type": "Map",
"required": false,
"meta": {
"description": "Custom attributes for the line item."
}
}
],
"output": [
{
"name": "lineItem",
"type": "Map",
"selector": ["line_item"],
"meta": {
"description": "The added line item details."
}
}
],
"steps": [
{
"type": "http",
"http": {
"method": "POST",
"path": "/admin/api/2023-10/orders/{{orderId}}/line_items.json",
"headers": {
"Content-Type": "application/json",
"X-Shopify-Access-Token": "{{accessToken}}"
},
"bodyTemplate": {
"value": "{\"line_item\": {\"variant_id\": {{variantId}}, \"quantity\": {{quantity}}, \"custom_attributes\": {{customAttributes}}}}",
"placeholders": [
{
"name": "variantId",
"type": "String",
"description": "The ID of the product variant.",
"required": true
},
{
"name": "quantity",
"type": "Integer",
"description": "The quantity of the product variant.",
"required": true
},
{
"name": "customAttributes",
"type": "Map",
"description": "Custom attributes for the line item.",
"required": false
}
]
}
}
}
]
}
```
---
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