curl --request POST \
  --url https://api.livechatinc.com/v3.7/configuration/action/update_form \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "prechat",
  "group_id": 0,
  "enabled": true,
  "fields": [
    {
      "type": "question",
      "label": "What is your name?",
      "required": true
    },
    {
      "type": "checkbox",
      "label": "Pick topics",
      "required": false,
      "answers": [
        {
          "label": "Billing",
          "checked": true
        },
        {
          "label": "Support",
          "checked": false
        }
      ]
    }
  ]
}
'

import requests

url = "https://api.livechatinc.com/v3.7/configuration/action/update_form"

payload = {
    "type": "prechat",
    "group_id": 0,
    "enabled": True,
    "fields": [
        {
            "type": "question",
            "label": "What is your name?",
            "required": True
        },
        {
            "type": "checkbox",
            "label": "Pick topics",
            "required": False,
            "answers": [
                {
                    "label": "Billing",
                    "checked": True
                },
                {
                    "label": "Support",
                    "checked": False
                }
            ]
        }
    ]
}
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({
    type: 'prechat',
    group_id: 0,
    enabled: true,
    fields: [
      {type: 'question', label: 'What is your name?', required: true},
      {
        type: 'checkbox',
        label: 'Pick topics',
        required: false,
        answers: [{label: 'Billing', checked: true}, {label: 'Support', checked: false}]
      }
    ]
  })
};

fetch('https://api.livechatinc.com/v3.7/configuration/action/update_form', 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/v3.7/configuration/action/update_form",
  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([
    'type' => 'prechat',
    'group_id' => 0,
    'enabled' => true,
    'fields' => [
        [
                'type' => 'question',
                'label' => 'What is your name?',
                'required' => true
        ],
        [
                'type' => 'checkbox',
                'label' => 'Pick topics',
                'required' => false,
                'answers' => [
                                [
                                                                'label' => 'Billing',
                                                                'checked' => true
                                ],
                                [
                                                                'label' => 'Support',
                                                                'checked' => false
                                ]
                ]
        ]
    ]
  ]),
  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/v3.7/configuration/action/update_form"

	payload := strings.NewReader("{\n  \"type\": \"prechat\",\n  \"group_id\": 0,\n  \"enabled\": true,\n  \"fields\": [\n    {\n      \"type\": \"question\",\n      \"label\": \"What is your name?\",\n      \"required\": true\n    },\n    {\n      \"type\": \"checkbox\",\n      \"label\": \"Pick topics\",\n      \"required\": false,\n      \"answers\": [\n        {\n          \"label\": \"Billing\",\n          \"checked\": true\n        },\n        {\n          \"label\": \"Support\",\n          \"checked\": false\n        }\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/v3.7/configuration/action/update_form")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"type\": \"prechat\",\n  \"group_id\": 0,\n  \"enabled\": true,\n  \"fields\": [\n    {\n      \"type\": \"question\",\n      \"label\": \"What is your name?\",\n      \"required\": true\n    },\n    {\n      \"type\": \"checkbox\",\n      \"label\": \"Pick topics\",\n      \"required\": false,\n      \"answers\": [\n        {\n          \"label\": \"Billing\",\n          \"checked\": true\n        },\n        {\n          \"label\": \"Support\",\n          \"checked\": false\n        }\n      ]\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.livechatinc.com/v3.7/configuration/action/update_form")

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  \"type\": \"prechat\",\n  \"group_id\": 0,\n  \"enabled\": true,\n  \"fields\": [\n    {\n      \"type\": \"question\",\n      \"label\": \"What is your name?\",\n      \"required\": true\n    },\n    {\n      \"type\": \"checkbox\",\n      \"label\": \"Pick topics\",\n      \"required\": false,\n      \"answers\": [\n        {\n          \"label\": \"Billing\",\n          \"checked\": true\n        },\n        {\n          \"label\": \"Support\",\n          \"checked\": false\n        }\n      ]\n    }\n  ]\n}"

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

{
  "form": {
    "id": "1",
    "type": "prechat",
    "enabled": true,
    "fields": [
      {
        "id": "153925275950libraryquestion",
        "type": "question",
        "label": "What is your name?",
        "required": true
      },
      {
        "id": "153925275950librarytopics",
        "type": "checkbox",
        "label": "Pick topics",
        "required": false,
        "answers": [
          {
            "label": "Billing",
            "checked": true
          },
          {
            "label": "Support",
            "checked": false
          }
        ]
      }
    ]
  }
}