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# Add order line item

POST https://api.mailchimp.com/3.0/ecommerce/stores/{store_id}/orders/{order_id}/lines
Content-Type: application/json

Add a new line item to an existing order.

Reference: https://mailchimp.com/developer/marketing/api/ecommerce/create-store-order-line

## Authentication

- `Authorization` header (bearer token, required) — Authorization using a Mailchimp API key (a.k.a. Bearer token)
- `Authorization` header (bearer token, required) — Authorization using OAuth

## Request

### Path parameters

- `store_id` (string, required) — The store id.
- `order_id` (string, required) — The id for the order in a store.

### Body (application/json)

This endpoint expects an object.

- `id` (string, required) — A unique identifier for the order line item.
- `price` (30EcommerceStoresStoreIdOrdersOrderIdLinesPostRequestBodyContentApplicationJsonSchemaPrice, required)
- `product_id` (string, required) — A unique identifier for the product associated with the order line item.
- `product_variant_id` (string, required) — A unique identifier for the product variant associated with the order line item.
- `quantity` (integer, required) — The quantity of an order line item.
- `discount` (30EcommerceStoresStoreIdOrdersOrderIdLinesPostRequestBodyContentApplicationJsonSchemaDiscount, optional)
- `product` (EcommerceStoresOrdersPost, optional) — Information about a specific product.

## Response

### 200

- `_links` (list of ECommerceOrderLineItemLinksItems, optional) — A list of link types and descriptions for the API schema documents.
- `discount` (double, optional) — The total discount amount applied to a line item.
- `id` (string, optional) — A unique identifier for an order line item.
- `image_url` (string, optional) — The image URL for a product.
- `price` (ECommerceOrderLineItemPrice, optional)
- `product_id` (string, optional) — A unique identifier for the product associated with an order line item.
- `product_title` (string, optional) — The name of the product for an order line item.
- `product_variant_id` (string, optional) — A unique identifier for the product variant associated with an order line item.
- `product_variant_title` (string, optional) — The name of the product variant for an order line item.
- `quantity` (integer, optional) — The order line item quantity.

## Types

### 30EcommerceStoresStoreIdOrdersOrderIdLinesPostRequestBodyContentApplicationJsonSchemaPrice

### 30EcommerceStoresStoreIdOrdersOrderIdLinesPostRequestBodyContentApplicationJsonSchemaDiscount

### EcommerceStoresOrdersPost

Information about a specific product.

- `id` (EcommerceStoresOrdersPostId, required) — A unique identifier for the product.
- `title` (string, required) — The title of a product.
- `variants` (list of EcommerceStoresOrdersPostVariantsItems, required) — An array of the product's variants. At least one variant is required for each product. A variant can use the same `id` and `title` as the parent product.
- `description` (string, optional) — The description of a product.
- `handle` (string, optional) — The handle of a product.
- `image_url` (string, optional) — The image URL for a product.
- `images` (list of EcommerceStoresOrdersPostImagesItems, optional) — An array of the product's images.
- `published_at_foreign` (string, optional) — The date and time the product was published.
- `type` (string, optional) — The type of product.
- `url` (string, optional) — The URL for a product.
- `vendor` (string, optional) — The vendor for a product.

### ECommerceOrderLineItemLinksItems

This object represents a link from the resource where it is found to another resource or action that may be performed.

- `href` (string, optional) — This property contains a fully-qualified URL that can be called to retrieve the linked resource or perform the linked action.
- `method` (enum, optional) — The HTTP method that should be used when accessing the URL defined in 'href'.
  - Allowed values: `GET`, `POST`, `PUT`, `PATCH`, `DELETE`, `OPTIONS`, `HEAD`
- `rel` (string, optional) — As with an HTML 'rel' attribute, this describes the type of link.
- `schema` (string, optional) — For HTTP methods that can receive bodies (POST and PUT), this is a URL representing the schema that the body should conform to.
- `targetSchema` (string, optional) — For GETs, this is a URL representing the schema that the response should conform to.

### ECommerceOrderLineItemPrice

### EcommerceStoresOrdersPostId

A unique identifier for the product.

### EcommerceStoresOrdersPostVariantsItems

Information about a specific product variant.

- `id` (EcommerceStoresOrdersPostVariantsItemsId, required) — A unique identifier for the product variant.
- `title` (string, required) — The title of a product variant.
- `backorders` (string, optional) — The backorders of a product variant.
- `image_url` (string, optional) — The image URL for a product variant.
- `inventory_quantity` (integer, optional) — The inventory quantity of a product variant.
- `price` (EcommerceStoresOrdersPostVariantsItemsPrice, optional)
- `sku` (string, optional) — The stock keeping unit (SKU) of a product variant.
- `url` (string, optional) — The URL for a product variant.
- `visibility` (string, optional) — The visibility of a product variant.

### EcommerceStoresOrdersPostImagesItems

Information about a specific product image.

- `id` (string, required) — A unique identifier for the product image.
- `url` (string, required) — The URL for a product image.
- `variant_ids` (list of EcommerceStoresOrdersPostImagesItemsVariantIdsItems, optional) — The list of product variants using the image.

### EcommerceStoresOrdersPostVariantsItemsId

A unique identifier for the product variant.

### EcommerceStoresOrdersPostVariantsItemsPrice

### EcommerceStoresOrdersPostImagesItemsVariantIdsItems

## Examples

**Request**

```json
{
  "id": "string",
  "price": 1.1,
  "product_id": "string",
  "product_variant_id": "string",
  "quantity": 1
}
```

**Response**

```json
{
  "_links": [
    {
      "href": "string",
      "method": "GET",
      "rel": "string",
      "schema": "string",
      "targetSchema": "string"
    }
  ],
  "discount": 1.1,
  "id": "string",
  "image_url": "string",
  "price": 1.1,
  "product_id": "string",
  "product_title": "string",
  "product_variant_id": "string",
  "product_variant_title": "string",
  "quantity": 1
}
```

**SDK Code**

```python
import requests

url = "https://api.mailchimp.com/3.0/ecommerce/stores/store_id/orders/order_id/lines"

payload = {
    "id": "string",
    "price": 1.1,
    "product_id": "string",
    "product_variant_id": "string",
    "quantity": 1
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://api.mailchimp.com/3.0/ecommerce/stores/store_id/orders/order_id/lines';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"id":"string","price":1.1,"product_id":"string","product_variant_id":"string","quantity":1}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.mailchimp.com/3.0/ecommerce/stores/store_id/orders/order_id/lines"

	payload := strings.NewReader("{\n  \"id\": \"string\",\n  \"price\": 1.1,\n  \"product_id\": \"string\",\n  \"product_variant_id\": \"string\",\n  \"quantity\": 1\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.mailchimp.com/3.0/ecommerce/stores/store_id/orders/order_id/lines")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"id\": \"string\",\n  \"price\": 1.1,\n  \"product_id\": \"string\",\n  \"product_variant_id\": \"string\",\n  \"quantity\": 1\n}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.mailchimp.com/3.0/ecommerce/stores/store_id/orders/order_id/lines")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": \"string\",\n  \"price\": 1.1,\n  \"product_id\": \"string\",\n  \"product_variant_id\": \"string\",\n  \"quantity\": 1\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.mailchimp.com/3.0/ecommerce/stores/store_id/orders/order_id/lines', [
  'body' => '{
  "id": "string",
  "price": 1.1,
  "product_id": "string",
  "product_variant_id": "string",
  "quantity": 1
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.mailchimp.com/3.0/ecommerce/stores/store_id/orders/order_id/lines");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"id\": \"string\",\n  \"price\": 1.1,\n  \"product_id\": \"string\",\n  \"product_variant_id\": \"string\",\n  \"quantity\": 1\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "id": "string",
  "price": 1.1,
  "product_id": "string",
  "product_variant_id": "string",
  "quantity": 1
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.mailchimp.com/3.0/ecommerce/stores/store_id/orders/order_id/lines")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

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