curl --request PATCH \
  --url https://swish.app/api/2026-07/items/{itemId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "productId": 123,
  "variantId": 456,
  "quantity": 2
}
'

import requests

url = "https://swish.app/api/2026-07/items/{itemId}"

payload = {
    "productId": 123,
    "variantId": 456,
    "quantity": 2
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({productId: 123, variantId: 456, quantity: 2})
};

fetch('https://swish.app/api/2026-07/items/{itemId}', 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://swish.app/api/2026-07/items/{itemId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'productId' => 123,
    'variantId' => 456,
    'quantity' => 2
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://swish.app/api/2026-07/items/{itemId}"

	payload := strings.NewReader("{\n  \"productId\": 123,\n  \"variantId\": 456,\n  \"quantity\": 2\n}")

	req, _ := http.NewRequest("PATCH", 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(string(body))

}

HttpResponse<String> response = Unirest.patch("https://swish.app/api/2026-07/items/{itemId}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"productId\": 123,\n  \"variantId\": 456,\n  \"quantity\": 2\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://swish.app/api/2026-07/items/{itemId}")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"productId\": 123,\n  \"variantId\": 456,\n  \"quantity\": 2\n}"

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

{
  "data": {
    "id": "67a61d5561e4f9de302c02a1",
    "productId": 123,
    "variantId": 456,
    "quantity": 1,
    "createdAt": "2025-01-01T10:00:00.000Z",
    "updatedAt": "2025-01-01T10:00:00.000Z",
    "metadata": {},
    "product": {
      "id": "gid://shopify/Product/123",
      "productType": "Dresses",
      "tags": [
        "sale",
        "summer"
      ],
      "title": "Kai Dress In Tuberose",
      "vendor": "W25A",
      "updatedAt": "2026-01-22T11:03:14Z",
      "handle": "kai-dress-in-tuberose",
      "availableForSale": true,
      "category": {
        "id": "gid://shopify/Category/1",
        "name": "Footwear"
      },
      "onlineStoreUrl": "https://example.com/products/kai-dress",
      "featuredImage": {
        "id": "gid://shopify/Image/1",
        "url": "https://example.com/image.jpg",
        "altText": "Product image",
        "thumbhash": "1QcSHQRnh493V4dIh4eXh1h4kJUI",
        "width": 2000,
        "height": 3000
      },
      "priceRange": {
        "maxVariantPrice": {
          "amount": "90.00",
          "currencyCode": "USD"
        },
        "minVariantPrice": {
          "amount": "90.00",
          "currencyCode": "USD"
        }
      },
      "compareAtPriceRange": {
        "maxVariantPrice": {
          "amount": "90.00",
          "currencyCode": "USD"
        },
        "minVariantPrice": {
          "amount": "90.00",
          "currencyCode": "USD"
        }
      },
      "variantsCount": 6
    },
    "variant": {
      "availableForSale": true,
      "selectedOptions": [
        {
          "name": "Size",
          "value": "9"
        }
      ],
      "currentlyNotInStock": false,
      "title": "Size 9",
      "price": {
        "amount": "90.00",
        "currencyCode": "USD"
      },
      "compareAtPrice": {
        "amount": "90.00",
        "currencyCode": "USD"
      },
      "quantityAvailable": 5,
      "sku": "SKU-123",
      "image": {
        "id": "gid://shopify/Image/1",
        "url": "https://example.com/image.jpg",
        "altText": "Product image",
        "thumbhash": "1QcSHQRnh493V4dIh4eXh1h4kJUI",
        "width": 2000,
        "height": 3000
      }
    }
  }
}

{
  "error": {
    "message": "Validation failed",
    "error": "Bad Request",
    "statusCode": 400,
    "requestId": "123e4567-e89b-12d3-a456-426614174000"
  }
}

{
  "error": {
    "message": "Failed to authenticate request",
    "error": "Unauthorized",
    "statusCode": 401,
    "requestId": "123e4567-e89b-12d3-a456-426614174000"
  }
}

{
  "error": {
    "message": "You do not have permission to access this resource",
    "error": "Forbidden",
    "statusCode": 403,
    "requestId": "123e4567-e89b-12d3-a456-426614174000"
  }
}

{
  "error": {
    "message": "The requested resource was not found",
    "error": "Not Found",
    "statusCode": 404,
    "requestId": "123e4567-e89b-12d3-a456-426614174000"
  }
}

{
  "error": {
    "message": "An unexpected error occurred",
    "error": "Internal Server Error",
    "statusCode": 500,
    "requestId": "123e4567-e89b-12d3-a456-426614174000"
  }
}