curl --request POST \
  --url https://api.livechatinc.com/v3.5/configuration/action/register_property \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "string_property",
  "owner_client_id": "0805e283233042b37f460ed8fbf22160",
  "type": "string",
  "default_value": "string_default_value",
  "access": {
    "chat": {
      "agent": [
        "read"
      ],
      "customer": [
        "read",
        "write"
      ]
    }
  }
}
'

import requests

url = "https://api.livechatinc.com/v3.5/configuration/action/register_property"

payload = {
    "name": "string_property",
    "owner_client_id": "0805e283233042b37f460ed8fbf22160",
    "type": "string",
    "default_value": "string_default_value",
    "access": { "chat": {
            "agent": ["read"],
            "customer": ["read", "write"]
        } }
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: 'string_property',
    owner_client_id: '0805e283233042b37f460ed8fbf22160',
    type: 'string',
    default_value: 'string_default_value',
    access: {chat: {agent: ['read'], customer: ['read', 'write']}}
  })
};

fetch('https://api.livechatinc.com/v3.5/configuration/action/register_property', 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.livechatinc.com/v3.5/configuration/action/register_property",
  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([
    'name' => 'string_property',
    'owner_client_id' => '0805e283233042b37f460ed8fbf22160',
    'type' => 'string',
    'default_value' => 'string_default_value',
    'access' => [
        'chat' => [
                'agent' => [
                                'read'
                ],
                'customer' => [
                                'read',
                                'write'
                ]
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "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.livechatinc.com/v3.5/configuration/action/register_property"

	payload := strings.NewReader("{\n  \"name\": \"string_property\",\n  \"owner_client_id\": \"0805e283233042b37f460ed8fbf22160\",\n  \"type\": \"string\",\n  \"default_value\": \"string_default_value\",\n  \"access\": {\n    \"chat\": {\n      \"agent\": [\n        \"read\"\n      ],\n      \"customer\": [\n        \"read\",\n        \"write\"\n      ]\n    }\n  }\n}")

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

	req.Header.Add("Authorization", "Basic <encoded-value>")
	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.livechatinc.com/v3.5/configuration/action/register_property")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"string_property\",\n  \"owner_client_id\": \"0805e283233042b37f460ed8fbf22160\",\n  \"type\": \"string\",\n  \"default_value\": \"string_default_value\",\n  \"access\": {\n    \"chat\": {\n      \"agent\": [\n        \"read\"\n      ],\n      \"customer\": [\n        \"read\",\n        \"write\"\n      ]\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.livechatinc.com/v3.5/configuration/action/register_property")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"string_property\",\n  \"owner_client_id\": \"0805e283233042b37f460ed8fbf22160\",\n  \"type\": \"string\",\n  \"default_value\": \"string_default_value\",\n  \"access\": {\n    \"chat\": {\n      \"agent\": [\n        \"read\"\n      ],\n      \"customer\": [\n        \"read\",\n        \"write\"\n      ]\n    }\n  }\n}"

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