curl --request POST \
  --url https://staging.api.commercengine.io/api/v1/{store_id}/storefront/carts/{id}/items \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "product_id": "<string>",
  "variant_id": "<string>",
  "quantity": 1
}
'

import requests

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

payload = {
    "product_id": "<string>",
    "variant_id": "<string>",
    "quantity": 1
}
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({product_id: '<string>', variant_id: '<string>', quantity: 1})
};

fetch('https://staging.api.commercengine.io/api/v1/{store_id}/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://staging.api.commercengine.io/api/v1/{store_id}/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([
    'product_id' => '<string>',
    'variant_id' => '<string>',
    'quantity' => 1
  ]),
  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://staging.api.commercengine.io/api/v1/{store_id}/storefront/carts/{id}/items"

	payload := strings.NewReader("{\n  \"product_id\": \"<string>\",\n  \"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(string(body))

}

HttpResponse<String> response = Unirest.post("https://staging.api.commercengine.io/api/v1/{store_id}/storefront/carts/{id}/items")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"product_id\": \"<string>\",\n  \"variant_id\": \"<string>\",\n  \"quantity\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://staging.api.commercengine.io/api/v1/{store_id}/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  \"product_id\": \"<string>\",\n  \"variant_id\": \"<string>\",\n  \"quantity\": 1\n}"

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

{
  "message": "<string>",
  "success": true,
  "content": {
    "cart": {
      "id": "<string>",
      "active": true,
      "customer_note": "<string>",
      "is_promotion_applied": true,
      "is_coupon_applied": true,
      "coupon_code": "<string>",
      "coupon_discount_amount": 1,
      "coupon_discount_percent": 1,
      "promotion_discount_amount": 1,
      "subtotal": 1,
      "items_tax_amount": 1,
      "subtotal_including_tax": 1,
      "shipping_estimated_cost": 123,
      "shipping_discount_amount": 123,
      "shipping_amount": 123,
      "shipping_tax_rate": 123,
      "shipping_tax_amount": 123,
      "shipping_amount_including_tax": 123,
      "estimated_delivery_days": 123,
      "handling_charge_excluding_tax": 1,
      "handling_charge_tax_amount": 1,
      "handling_charge_including_tax": 1,
      "total_tax": 1,
      "grand_total": 1,
      "credit_balance_used": 1,
      "to_be_paid": 1,
      "loyalty_points_redeemed": 1,
      "loyalty_points_earned": 1,
      "cart_items_count": 1,
      "cart_items": [
        {
          "product_id": "<string>",
          "variant_id": "<string>",
          "sku": "<string>",
          "slug": "<string>",
          "product_name": "<string>",
          "variant_name": "<string>",
          "product_image_url": "<string>",
          "stock_available": true,
          "backorder": true,
          "on_subscription": true,
          "on_promotion": true,
          "quantity": 123,
          "is_free_item": true,
          "free_quantity": 123,
          "promotion_discount_amount": 123,
          "coupon_discount_amount": 123,
          "price_including_tax": true,
          "listing_price": 200,
          "selling_price": 199,
          "selling_price_excluding_tax": 123,
          "min_order_quantity": 1,
          "max_order_quantity": 123,
          "incremental_quantity": 1,
          "handling_charge_excluding_tax": 1,
          "handling_charge_tax_rate": 1,
          "handling_charge_including_tax": 1,
          "tax_type": "GST",
          "tax_rate": 123,
          "tax_amount": 123,
          "associated_options": {
            "background_color": {
              "name": "Background Color",
              "value": {
                "name": "Blue",
                "hexcode": "#0000FF"
              },
              "type": "color"
            },
            "size": {
              "name": "Size",
              "value": "Large",
              "type": "single-select"
            }
          },
          "attributes": [
            {
              "id": "<string>",
              "name": "<string>",
              "key": "<string>",
              "type": "color",
              "value": [
                {
                  "name": "<string>",
                  "hexcode": "<string>"
                }
              ]
            }
          ],
          "subscriptions": [
            {
              "id": "<string>",
              "subscription_plan": "<string>",
              "subscription_price": 123,
              "billing_interval": 123,
              "billing_limit": 123,
              "fulfill_separately": false,
              "order_interval": 123,
              "order_limit": 123,
              "minimum_quantity": 123,
              "billing_trial_days": 123
            }
          ],
          "seller_id": "<string>",
          "seller_detail": {
            "id": "<string>",
            "trade_name": "<string>",
            "legal_name": "<string>",
            "business_type": "<string>",
            "tax_identification_number": "<string>"
          }
        }
      ],
      "billing_address": {
        "first_name": "<string>",
        "last_name": "<string>",
        "country_code": "<string>",
        "phone": "<string>",
        "email": "<string>",
        "address_line1": "<string>",
        "address_line2": "<string>",
        "landmark": "<string>",
        "pincode": "<string>",
        "city": "<string>",
        "state": "<string>",
        "country": "<string>",
        "tax_identification_number": "<string>",
        "business_name": "<string>",
        "is_phone_verified": true,
        "is_email_verified": true,
        "id": "<string>",
        "is_default_billing": true,
        "is_default_shipping": true,
        "nickname": null
      },
      "shipping_address": {
        "first_name": "<string>",
        "last_name": "<string>",
        "country_code": "<string>",
        "phone": "<string>",
        "email": "<string>",
        "address_line1": "<string>",
        "address_line2": "<string>",
        "landmark": "<string>",
        "pincode": "<string>",
        "city": "<string>",
        "state": "<string>",
        "country": "<string>",
        "tax_identification_number": "<string>",
        "business_name": "<string>",
        "is_phone_verified": true,
        "is_email_verified": true,
        "id": "<string>",
        "is_default_billing": true,
        "is_default_shipping": true,
        "nickname": null
      },
      "currency": {
        "name": "<string>",
        "code": "<string>",
        "symbol": "<string>"
      },
      "metadata": {},
      "expires_at": "2023-11-07T05:31:56Z",
      "applied_promotions": [
        {
          "promotion_id": "<string>",
          "savings": 123,
          "product_id": "<string>",
          "variant_id": "<string>",
          "product_name": "<string>",
          "variant_name": "<string>",
          "applied_sequence": 123,
          "scope": "<string>"
        }
      ],
      "applied_coupons": [
        {
          "coupon_id": "<string>",
          "savings": 123,
          "product_id": "<string>",
          "variant_id": "<string>",
          "product_name": "<string>",
          "variant_name": "<string>"
        }
      ],
      "shipments": [
        {
          "id": "<string>",
          "shipping_provider_id": "<string>",
          "shipping_provider_name": "<string>",
          "courier_company_id": "<string>",
          "courier_company_name": "<string>",
          "shipping_amount": 123,
          "shipping_tax_amount": 123,
          "shipping_amount_including_tax": 123,
          "shipment_items_count": 123,
          "shipment_items": [
            {
              "product_id": "<string>",
              "product_name": "<string>",
              "product_image_url": "<string>",
              "variant_id": "<string>",
              "variant_name": "<string>",
              "sku": "<string>",
              "quantity": 123,
              "free_quantity": 123,
              "is_free_item": true
            }
          ]
        }
      ],
      "promotion_savings": 1,
      "coupon_savings": 1,
      "other_savings": 1,
      "total_savings": 1,
      "free_shipping_threshold": 123,
      "status": "not-ready-for-payment",
      "status_error_message": "<string>",
      "promotion_discount_percent": 1,
      "fulfillment_preference": {
        "fulfillment_type": "<string>",
        "pickup_location_id": "<string>",
        "pickup_location_name": "<string>"
      }
    }
  }
}

{
  "message": "<string>",
  "success": true,
  "code": "<string>",
  "error": {}
}

{
  "message": "<string>",
  "success": false,
  "code": "<string>"
}

{
  "message": "<string>",
  "success": true,
  "code": "<string>"
}