curl --request POST \
  --url https://api.hubapi.com/crm-objects/v1/objects/line_items/batch-create

import requests

url = "https://api.hubapi.com/crm-objects/v1/objects/line_items/batch-create"

response = requests.post(url)

print(response.text)

const options = {method: 'POST'};

fetch('https://api.hubapi.com/crm-objects/v1/objects/line_items/batch-create', 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.hubapi.com/crm-objects/v1/objects/line_items/batch-create",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.hubapi.com/crm-objects/v1/objects/line_items/batch-create"

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

	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.hubapi.com/crm-objects/v1/objects/line_items/batch-create")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hubapi.com/crm-objects/v1/objects/line_items/batch-create")

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

request = Net::HTTP::Post.new(url)

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

[
  {
    "name": "hs_product_id",
    "value": "1645342"
  },
  {
    "name": "quantity",
    "value": "25"
  },
  {
    "name": "name",
    "value": "A custom name for the product for this line item."
  },
  {
    "name": "hs_product_id",
    "value": "1645187"
  },
  {
    "name": "quantity",
    "value": "25"
  },
  {
    "name": "price",
    "value": "9.00"
  },
  {
    "name": "name",
    "value": "Widgets, special discount price"
  },
  {
    "versions": [
      {
        "name": "amount",
        "value": "687.50",
        "timestamp": 0,
        "sourceId": "LineItemAmountCalculator",
        "source": "CALCULATED",
        "sourceVid": []
      }
    ],
    "value": "687.50",
    "timestamp": 0,
    "source": "CALCULATED",
    "sourceId": "LineItemAmountCalculator"
  },
  {
    "versions": [
      {
        "name": "quantity",
        "value": "25",
        "timestamp": 1525369755209,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "25",
    "timestamp": 1525369755209,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "hs_lastmodifieddate",
        "value": "0",
        "timestamp": 0,
        "source": "CALCULATED",
        "sourceVid": []
      }
    ],
    "value": "0",
    "timestamp": 0,
    "source": "CALCULATED",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "price",
        "value": "27.50",
        "timestamp": 1525299376761,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "27.50",
    "timestamp": 1525299376761,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "name",
        "value": "A custom name for the product for this line item.",
        "timestamp": 1525369755209,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "A custom name for the product for this line item.",
    "timestamp": 1525369755209,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "createdate",
        "value": "0",
        "timestamp": 0,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "0",
    "timestamp": 0,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "description",
        "value": "A description of this product.",
        "timestamp": 1525299376761,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "A description of this product.",
    "timestamp": 1525299376761,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "hs_product_id",
        "value": "1645342",
        "timestamp": 1525369755209,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "1645342",
    "timestamp": 1525369755209,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "recurringbillingfrequency",
        "value": "quarterly",
        "timestamp": 1525299376761,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "quarterly",
    "timestamp": 1525299376761,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "amount",
        "value": "-275.00",
        "timestamp": 0,
        "sourceId": "LineItemAmountCalculator",
        "source": "CALCULATED",
        "sourceVid": []
      }
    ],
    "value": "-275.00",
    "timestamp": 0,
    "source": "CALCULATED",
    "sourceId": "LineItemAmountCalculator"
  },
  {
    "versions": [
      {
        "name": "quantity",
        "value": "25",
        "timestamp": 1525369755209,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "25",
    "timestamp": 1525369755209,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "hs_lastmodifieddate",
        "value": "0",
        "timestamp": 0,
        "source": "CALCULATED",
        "sourceVid": []
      }
    ],
    "value": "0",
    "timestamp": 0,
    "source": "CALCULATED",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "price",
        "value": "9.00",
        "timestamp": 1525369755209,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "9.00",
    "timestamp": 1525369755209,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "name",
        "value": "Widgets, special discount price",
        "timestamp": 1525369755209,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "Widgets, special discount price",
    "timestamp": 1525369755209,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "createdate",
        "value": "0",
        "timestamp": 0,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "0",
    "timestamp": 0,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "discount",
        "value": "20",
        "timestamp": 1525292253568,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "20",
    "timestamp": 1525292253568,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "description",
        "value": "A description of yet another product.",
        "timestamp": 1525289943771,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "A description of yet another product.",
    "timestamp": 1525289943771,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "hs_product_id",
        "value": "1645187",
        "timestamp": 1525369755209,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "1645187",
    "timestamp": 1525369755209,
    "source": "API",
    "sourceId": null
  },
  {
    "versions": [
      {
        "name": "recurringbillingfrequency",
        "value": "annually",
        "timestamp": 1525289943771,
        "source": "API",
        "sourceVid": []
      }
    ],
    "value": "annually",
    "timestamp": 1525289943771,
    "source": "API",
    "sourceId": null
  }
]