curl --request PUT \
  --url https://{subdomain}.outseta.com/api/v1/email/lists/{emailListUid} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "Name": "Product updates",
  "Description": "Monthly product news and announcements",
  "RequiresDoubleOptIn": true
}
'

import requests

url = "https://{subdomain}.outseta.com/api/v1/email/lists/{emailListUid}"

payload = {
    "Name": "Product updates",
    "Description": "Monthly product news and announcements",
    "RequiresDoubleOptIn": True
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    Name: 'Product updates',
    Description: 'Monthly product news and announcements',
    RequiresDoubleOptIn: true
  })
};

fetch('https://{subdomain}.outseta.com/api/v1/email/lists/{emailListUid}', 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://{subdomain}.outseta.com/api/v1/email/lists/{emailListUid}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'Name' => 'Product updates',
    'Description' => 'Monthly product news and announcements',
    'RequiresDoubleOptIn' => true
  ]),
  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://{subdomain}.outseta.com/api/v1/email/lists/{emailListUid}"

	payload := strings.NewReader("{\n  \"Name\": \"Product updates\",\n  \"Description\": \"Monthly product news and announcements\",\n  \"RequiresDoubleOptIn\": true\n}")

	req, _ := http.NewRequest("PUT", 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.put("https://{subdomain}.outseta.com/api/v1/email/lists/{emailListUid}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"Name\": \"Product updates\",\n  \"Description\": \"Monthly product news and announcements\",\n  \"RequiresDoubleOptIn\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{subdomain}.outseta.com/api/v1/email/lists/{emailListUid}")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"Name\": \"Product updates\",\n  \"Description\": \"Monthly product news and announcements\",\n  \"RequiresDoubleOptIn\": true\n}"

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

{
  "Uid": "string",
  "_objectType": "string",
  "Created": "string",
  "Updated": "string",
  "ActivityEventData": {},
  "Name": "string",
  "Description": "string",
  "WelcomeSubject": "string",
  "WelcomeBody": "string",
  "WelcomeFromName": "string",
  "WelcomeFromEmail": "string",
  "RequiresDoubleOptIn": false,
  "IsInternal": false,
  "EmailListPerson": [
    {
      "Uid": "string",
      "_objectType": "string",
      "Created": "string",
      "Updated": "string",
      "ActivityEventData": {},
      "EmailList": {},
      "Person": {},
      "EmailListSubscriberStatus": 1,
      "SubscribedDate": "string",
      "ConfirmedDate": "string",
      "ConfirmationNotes": "string",
      "UnsubscribedDate": "string",
      "CleanedDate": "string",
      "WelcomeEmailDeliverDateTime": "string",
      "WelcomeEmailOpenDateTime": "string",
      "UnsubscribeReason": "string",
      "UnsubscribeReasonOther": "string",
      "RecaptchaToken": "string",
      "RecaptchaSiteKey": "string",
      "SendWelcomeEmail": false,
      "Source": "string"
    }
  ],
  "FieldConfigurationDataJSON": "string",
  "CountSubscriptionsActive": 0,
  "CountSubscriptionsBounce": 0,
  "CountSubscriptionsNotConfirmed": 0,
  "CountSubscriptionsSpam": 0,
  "CountSubscriptionsUnsubscribed": 0
}