curl --request POST \
  --url https://api.{tenant}.getomneo.com/api/v3/transactions/items/{transactionitem}/list-item \
  --header 'Content-Type: application/json' \
  --data '
{
  "product_list_item_id": 123
}
'

import requests

url = "https://api.{tenant}.getomneo.com/api/v3/transactions/items/{transactionitem}/list-item"

payload = { "product_list_item_id": 123 }
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({product_list_item_id: 123})
};

fetch('https://api.{tenant}.getomneo.com/api/v3/transactions/items/{transactionitem}/list-item', 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.{tenant}.getomneo.com/api/v3/transactions/items/{transactionitem}/list-item",
  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_list_item_id' => 123
  ]),
  CURLOPT_HTTPHEADER => [
    "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.{tenant}.getomneo.com/api/v3/transactions/items/{transactionitem}/list-item"

	payload := strings.NewReader("{\n  \"product_list_item_id\": 123\n}")

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

	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.{tenant}.getomneo.com/api/v3/transactions/items/{transactionitem}/list-item")
  .header("Content-Type", "application/json")
  .body("{\n  \"product_list_item_id\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.{tenant}.getomneo.com/api/v3/transactions/items/{transactionitem}/list-item")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"product_list_item_id\": 123\n}"

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

{
  "data": {
    "id": 123,
    "external_id": "<string>",
    "name": "<string>",
    "transaction_id": 123,
    "product_id": 123,
    "product_variant_id": 123,
    "sku": "<string>",
    "variant_external_id": "<string>",
    "is_void": true,
    "quantity": 123,
    "price_current": 123,
    "price_sell": 123,
    "price_original": 123,
    "price_margin": 123,
    "price_tax": 123,
    "is_return": "<string>",
    "discounts": [
      "<unknown>"
    ],
    "department": "<string>",
    "meta": [
      "<unknown>"
    ],
    "product_images": {},
    "order_id": 123,
    "created_at": "<string>",
    "updated_at": "<string>",
    "pivot": {
      "created_at": "<string>",
      "updated_at": "<string>"
    },
    "product_variant": {
      "id": 123,
      "product_id": 123,
      "sku": "<string>",
      "external_id": "<string>",
      "barcode": "<string>",
      "web_url": "<string>",
      "handle": "<string>",
      "title": "<string>",
      "description": "<string>",
      "position": 123,
      "price": 123,
      "price_discounted": 123,
      "price_comparison": 123,
      "price_cost": 123,
      "available_quantity": 123,
      "images": "<string>",
      "meta": [
        "<unknown>"
      ],
      "tags": [
        "<string>"
      ],
      "options": [
        {
          "name": "<string>",
          "value": "<string>",
          "sort_order": 123
        }
      ],
      "created_at": "<string>",
      "updated_at": "<string>",
      "deleted_at": "<string>"
    },
    "product": {
      "title": "<string>",
      "department": "<string>",
      "brand": "<string>",
      "custom_fields": [
        {
          "name": "<string>",
          "handle": "<string>",
          "namespace": "<string>",
          "value": "<string>",
          "type": "<string>",
          "custom_fieldable_type": "<string>",
          "custom_fieldable": {
            "id": "<string>",
            "external_id": "<string>",
            "profile_id": "<string>",
            "meta": "<string>",
            "total": "<string>",
            "total_original": "<string>",
            "rounding": "<string>",
            "margin": "<string>",
            "is_void": "<string>",
            "transacted_at": "<string>",
            "timezone": "<string>",
            "payments": "<string>",
            "receipt_is_email": "<string>",
            "receipt_ref": "<string>",
            "linked_receipt_ref": "<string>",
            "claimed_at": "<string>",
            "receipt_email": "<string>",
            "currency_id": "<string>",
            "currency_rate": "<string>",
            "currency": "<string>",
            "type": "<string>",
            "status": "<string>",
            "order_number": "<string>",
            "order_id": "<string>",
            "external_order_id": "<string>",
            "created_at": "<string>",
            "updated_at": "<string>"
          },
          "created_at": "<string>",
          "updated_at": "<string>",
          "is_index": 123
        }
      ]
    },
    "transaction": {
      "transacted_at": "<string>",
      "receipt_ref": "<string>",
      "external_id": "<string>",
      "location": {
        "id": 123,
        "type": "<string>",
        "name": "<string>",
        "description": "<string>",
        "phone": "<string>",
        "email": "<string>",
        "external_id": "<string>",
        "is_published": true,
        "is_permanently_closed": true,
        "address": {
          "id": 123,
          "address_line_1": "<string>",
          "address_line_2": "<string>",
          "address_line_3": "<string>",
          "company": "<string>",
          "latitude": 123,
          "longitude": 123,
          "city": "<string>",
          "postcode": "<string>",
          "state": "<string>",
          "country": "<string>",
          "notes": "<string>",
          "external_id": "<string>",
          "is_default": true,
          "created_at": "<string>",
          "updated_at": "<string>",
          "meta": [
            "<unknown>"
          ],
          "name": "<string>",
          "type": "<string>",
          "phone": "<string>",
          "iso": "<string>",
          "iso_state": "<string>",
          "profile_id": "<string>",
          "custom_fields": {}
        }
      }
    },
    "list_items": [
      {
        "id": "<string>",
        "product_list_id": "<string>",
        "list": {
          "name": "<string>",
          "handle": "<string>",
          "description": "<string>"
        },
        "created_at": "<string>",
        "updated_at": "<string>",
        "quantity": "<string>",
        "position": "<string>",
        "status": "<string>",
        "meta": "<string>",
        "pivot": {
          "created_at": "<string>",
          "updated_at": "<string>"
        }
      }
    ]
  }
}

{
  "message": "<string>"
}

{
  "message": "<string>"
}

{
  "message": "<string>"
}

{
  "message": "<string>",
  "errors": {}
}