curl --request POST \
  --url https://api.headlesscommerce.io/v1/storefront/carts/{id}/items \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "variant_id": "<string>",
  "quantity": 2,
  "metadata": {}
}
'

import requests

url = "https://api.headlesscommerce.io/v1/storefront/carts/{id}/items"

payload = {
    "variant_id": "<string>",
    "quantity": 2,
    "metadata": {}
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({variant_id: '<string>', quantity: 2, metadata: {}})
};

fetch('https://api.headlesscommerce.io/v1/storefront/carts/{id}/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.headlesscommerce.io/v1/storefront/carts/{id}/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' => '<string>',
    'quantity' => 2,
    'metadata' => [
        
    ]
  ]),
  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://api.headlesscommerce.io/v1/storefront/carts/{id}/items"

	payload := strings.NewReader("{\n  \"variant_id\": \"<string>\",\n  \"quantity\": 2,\n  \"metadata\": {}\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(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.headlesscommerce.io/v1/storefront/carts/{id}/items")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"variant_id\": \"<string>\",\n  \"quantity\": 2,\n  \"metadata\": {}\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.headlesscommerce.io/v1/storefront/carts/{id}/items")

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  \"variant_id\": \"<string>\",\n  \"quantity\": 2,\n  \"metadata\": {}\n}"

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

{
  "id": "<string>",
  "status": "active",
  "session_id": "<string>",
  "customer_id": "<string>",
  "items": [
    {
      "id": "<string>",
      "variant_id": "<string>",
      "product_id": "<string>",
      "product_name": "<string>",
      "variant_name": "<string>",
      "sku": "<string>",
      "image_url": "<string>",
      "quantity": 123,
      "unit_price": {
        "amount": 123,
        "currency": "<string>"
      },
      "line_discount": {
        "amount": 123,
        "currency": "<string>"
      },
      "line_total": {
        "amount": 123,
        "currency": "<string>"
      },
      "metadata": {}
    }
  ],
  "shipping_address": {
    "name": "<string>",
    "company": "<string>",
    "line1": "<string>",
    "line2": "<string>",
    "city": "<string>",
    "state": "<string>",
    "postal_code": "<string>",
    "country": "<string>",
    "phone": "<string>"
  },
  "billing_address": {
    "name": "<string>",
    "company": "<string>",
    "line1": "<string>",
    "line2": "<string>",
    "city": "<string>",
    "state": "<string>",
    "postal_code": "<string>",
    "country": "<string>",
    "phone": "<string>"
  },
  "shipping_method_id": "<string>",
  "discount_codes": [
    "<string>"
  ],
  "summary": {
    "subtotal": {
      "amount": 123,
      "currency": "<string>"
    },
    "discount_total": {
      "amount": 123,
      "currency": "<string>"
    },
    "shipping_total": {
      "amount": 123,
      "currency": "<string>"
    },
    "tax_total": {
      "amount": 123,
      "currency": "<string>"
    },
    "total": {
      "amount": 123,
      "currency": "<string>"
    },
    "item_count": 123,
    "total_quantity": 123
  },
  "applied_discounts": [
    {
      "discount_id": "<string>",
      "code": "<string>",
      "name": "<string>",
      "value_type": "fixed",
      "value": 123,
      "saved": {
        "amount": 123,
        "currency": "<string>"
      }
    }
  ],
  "metadata": {},
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}