curl --request POST \
  --url https://api.loopreturns.com/api/v1/draft-returns/{draft_return_id}/cart/items \
  --header 'Content-Type: application/json' \
  --header 'X-Authorization: <api-key>' \
  --data '
{
  "variant_id": 123,
  "quantity": 123
}
'

import requests

url = "https://api.loopreturns.com/api/v1/draft-returns/{draft_return_id}/cart/items"

payload = {
    "variant_id": 123,
    "quantity": 123
}
headers = {
    "X-Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-Authorization': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({variant_id: 123, quantity: 123})
};

fetch('https://api.loopreturns.com/api/v1/draft-returns/{draft_return_id}/cart/items', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.loopreturns.com/api/v1/draft-returns/{draft_return_id}/cart/items",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'variant_id' => 123,
    'quantity' => 123
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Authorization: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.loopreturns.com/api/v1/draft-returns/{draft_return_id}/cart/items"

	payload := strings.NewReader("{\n  \"variant_id\": 123,\n  \"quantity\": 123\n}")

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

	req.Header.Add("X-Authorization", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.loopreturns.com/api/v1/draft-returns/{draft_return_id}/cart/items")
  .header("X-Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"variant_id\": 123,\n  \"quantity\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.loopreturns.com/api/v1/draft-returns/{draft_return_id}/cart/items")

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

request = Net::HTTP::Post.new(url)
request["X-Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"variant_id\": 123,\n  \"quantity\": 123\n}"

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

{
  "_links": {
    "self": {
      "href": "<string>"
    }
  },
  "_templates": {},
  "client_application": {},
  "draft_return": {
    "id": 12345,
    "return_id": 67890,
    "state": "created",
    "currency": "USD",
    "language": "en",
    "credit_type": null,
    "processing_type": "regular",
    "customer": {
      "email": "someone@test.com"
    },
    "shipping_address": {
      "name": "Jane Doe",
      "company": null,
      "address1": "123 Main St",
      "address2": "Apt 4",
      "city": "Chicago",
      "state": "Illinois",
      "zip": "60622",
      "country": "United States",
      "country_code": "US",
      "phone": "555-555-5555"
    },
    "returning_items": [
      {
        "id": 1,
        "order_line_item_id": 12346,
        "return_type": "credit",
        "resolution": "return",
        "return_reason": {
          "name": "Item didn't fit",
          "comment": null
        },
        "user_inputs": [
          {
            "id": 1,
            "type": "yes-no",
            "prompt": "Is the item still in its original packaging?",
            "value": true
          }
        ],
        "image_uploads": [
          "https://cdn.example.com/return-images/abc123.jpg"
        ]
      }
    ],
    "cart_items": [
      {
        "id": 201,
        "variant_id": 501,
        "product_id": 100,
        "sku": "SHIRT-RED-S",
        "title": "Red Shirt",
        "variant_title": "Small",
        "translated_title": "Chemise rouge",
        "translated_variant_title": "Petit",
        "price": 2500,
        "image": "https://cdn.example.com/products/red-shirt.jpg",
        "exchange_type": "exchange",
        "exchange_for_returning_item_id": 1
      }
    ],
    "selected_return_method": {
      "id": 123,
      "name": "<string>",
      "type": "box-and-ship",
      "title": "<string>",
      "logo_url": "<string>",
      "location_url": "<string>"
    },
    "payment_intent": {
      "id": 123,
      "provider": "<string>",
      "provider_intent_id": "<string>"
    },
    "return_key": "<string>",
    "requires_uncollectible_payment": false
  },
  "context": {
    "languages": [
      {
        "name": "<string>",
        "abbreviation": "<string>"
      }
    ],
    "order": {
      "id": 123,
      "currency": "<string>",
      "original_payment_transactions": [
        {
          "type": "<string>",
          "gateway": "<string>",
          "amount": 123,
          "currency": "<string>",
          "brand": "<string>",
          "last4": 123
        }
      ],
      "line_items": [
        {
          "id": 123,
          "provider_product_id": 123,
          "provider_variant_id": 123,
          "title": "<string>",
          "variant_title": "<string>",
          "sku": "<string>",
          "description": "<string>",
          "price": 123,
          "image": "<string>",
          "parent_line_item_id": 123,
          "options": [
            {
              "name": "<string>",
              "value": "<string>"
            }
          ]
        }
      ]
    },
    "return_reason_groups": [
      {
        "id": 123,
        "return_reasons": [
          {
            "id": 123,
            "name": "<string>",
            "parent_return_reason_id": 123,
            "parent_return_reason_name": "<string>",
            "is_commentable": true,
            "requires_comments": true
          }
        ]
      }
    ],
    "items_eligible_to_return": [
      {
        "order_line_item_id": 123,
        "return_reason_group_id": 123,
        "expiration": "<string>"
      }
    ],
    "items_not_eligible_to_return": [
      {
        "order_line_item_id": 123,
        "ineligibility_code": "<string>",
        "expiration": "<string>"
      }
    ],
    "return_reason_options": [
      [
        {
          "id": 123,
          "name": "<string>",
          "is_commentable": true,
          "requires_comments": true
        }
      ]
    ],
    "exchange_options": [
      {
        "product_options": [
          {
            "name": "<string>",
            "values": "<array>",
            "position": 123
          }
        ],
        "product_variants": [
          {
            "product_id": 123,
            "variant_id": 123,
            "title": "<string>",
            "variant_title": "<string>",
            "product_type": "<string>",
            "options": {},
            "image": "<string>",
            "price": 123,
            "currency": "<string>",
            "is_available": true,
            "translated_title": "<string>",
            "translated_variant_title": "<string>",
            "translated_options": [
              {
                "name": "<string>",
                "value": "<string>"
              }
            ]
          }
        ]
      }
    ],
    "return_method_options": [
      {
        "id": 123,
        "name": "<string>",
        "type": "box-and-ship",
        "fee": 123,
        "title": "<string>",
        "logo_url": "<string>",
        "location_url": "<string>"
      }
    ],
    "processing_type_options": {
      "required": false,
      "options": [
        {
          "type": "regular",
          "available": true,
          "unavailability_reason": "not-enabled",
          "authorization_amount": {
            "amount": 5000,
            "currency_code": "USD"
          },
          "charge_amount": {
            "amount": 5000,
            "currency_code": "USD"
          },
          "window_days": 14,
          "hold_window_days": null
        }
      ]
    }
  },
  "errors": [
    {
      "code": "draft-returns-not-enabled",
      "message": "<string>"
    }
  ]
}

{
  "errors": [
    {
      "code": "unauthorized",
      "message": "Unauthorized."
    }
  ]
}

{
  "errors": [
    {
      "code": "validation-failed",
      "message": "Validation failed."
    }
  ]
}