curl --request POST \
  --url https://letterby.com/api/v4/lists \
  --header 'Content-Type: application/json' \
  --header 'apiKey: <api-key>' \
  --data '
{
  "name": "<string>",
  "url": "<string>",
  "desc": "<string>"
}
'

import requests

url = "https://letterby.com/api/v4/lists"

payload = {
    "name": "<string>",
    "url": "<string>",
    "desc": "<string>"
}
headers = {
    "apiKey": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {apiKey: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({name: '<string>', url: '<string>', desc: '<string>'})
};

fetch('https://letterby.com/api/v4/lists', 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://letterby.com/api/v4/lists",
  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>',
    'url' => '<string>',
    'desc' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "apiKey: <api-key>"
  ],
]);

$response = curl_exec($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://letterby.com/api/v4/lists"

	payload := strings.NewReader("{\n  \"name\": \"<string>\",\n  \"url\": \"<string>\",\n  \"desc\": \"<string>\"\n}")

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

	req.Header.Add("apiKey", "<api-key>")
	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://letterby.com/api/v4/lists")
  .header("apiKey", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"<string>\",\n  \"url\": \"<string>\",\n  \"desc\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://letterby.com/api/v4/lists")

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

request = Net::HTTP::Post.new(url)
request["apiKey"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"<string>\",\n  \"url\": \"<string>\",\n  \"desc\": \"<string>\"\n}"

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

{
  "data": {
    "list": {
      "id": "<string>",
      "url": "<string>",
      "branding": true,
      "startFrom": 123,
      "mode": "<string>",
      "name": "<string>",
      "referrals": true,
      "color": "<string>",
      "title": "<string>",
      "desc": "<string>",
      "socialDescription": "<string>",
      "senderName": "<string>",
      "replyTo": "<string>",
      "sender": "<string>",
      "legal": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "userId": "<string>",
      "domainId": "<string>",
      "defaultPageId": "<string>",
      "referralPageId": "<string>",
      "successPageId": "<string>",
      "icon": "<string>",
      "favicon": "<string>",
      "ogImage": "<string>",
      "listSettingsId": "<string>",
      "whitelistEmailId": "<string>",
      "templateId": "<string>",
      "themeId": "<string>",
      "columns": [
        "<string>"
      ],
      "customHeadCode": "<string>",
      "customBodyCode": "<string>",
      "googleAnalytics": "<string>",
      "plausibleAnalytics": "<string>"
    }
  }
}

{
  "error": 123,
  "message": "<string>"
}

{
  "error": 123,
  "message": "<string>"
}

{
  "error": "Name and url are required"
}