curl --request POST \
  --url https://letterby.com/api/v4/audiences \
  --header 'Content-Type: application/json' \
  --header 'apiKey: <api-key>' \
  --data '
{
  "name": "<string>",
  "listId": "<string>",
  "filters": "{\"points\": {\"gte\": 100}, \"AND\": [{\"email\": {\"contains\": \"@gmail.com\"}}]}",
  "mode": "manual"
}
'

import requests

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

payload = {
    "name": "<string>",
    "listId": "<string>",
    "filters": "{\"points\": {\"gte\": 100}, \"AND\": [{\"email\": {\"contains\": \"@gmail.com\"}}]}",
    "mode": "manual"
}
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>',
    listId: '<string>',
    filters: '{"points": {"gte": 100}, "AND": [{"email": {"contains": "@gmail.com"}}]}',
    mode: 'manual'
  })
};

fetch('https://letterby.com/api/v4/audiences', 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/audiences",
  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>',
    'listId' => '<string>',
    'filters' => '{"points": {"gte": 100}, "AND": [{"email": {"contains": "@gmail.com"}}]}',
    'mode' => 'manual'
  ]),
  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/audiences"

	payload := strings.NewReader("{\n  \"name\": \"<string>\",\n  \"listId\": \"<string>\",\n  \"filters\": \"{\\\"points\\\": {\\\"gte\\\": 100}, \\\"AND\\\": [{\\\"email\\\": {\\\"contains\\\": \\\"@gmail.com\\\"}}]}\",\n  \"mode\": \"manual\"\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/audiences")
  .header("apiKey", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"<string>\",\n  \"listId\": \"<string>\",\n  \"filters\": \"{\\\"points\\\": {\\\"gte\\\": 100}, \\\"AND\\\": [{\\\"email\\\": {\\\"contains\\\": \\\"@gmail.com\\\"}}]}\",\n  \"mode\": \"manual\"\n}")
  .asString();

require 'uri'
require 'net/http'

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

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  \"listId\": \"<string>\",\n  \"filters\": \"{\\\"points\\\": {\\\"gte\\\": 100}, \\\"AND\\\": [{\\\"email\\\": {\\\"contains\\\": \\\"@gmail.com\\\"}}]}\",\n  \"mode\": \"manual\"\n}"

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

{
  "data": {
    "audience": {
      "id": "<string>",
      "name": "<string>",
      "filters": "<string>",
      "mode": "smart",
      "listId": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "subs": [
        {
          "id": "<string>",
          "email": "<string>",
          "firstName": "<string>",
          "lastName": "<string>",
          "phoneNumber": "<string>",
          "createdAt": "2023-11-07T05:31:56Z",
          "points": 123,
          "referrals": 123,
          "listId": "<string>",
          "isVerified": true,
          "unsubscribed": true,
          "data": {},
          "address": "<string>",
          "isGDPR": true,
          "name": "<string>",
          "instagram": "<string>",
          "twitter": "<string>",
          "website": "<string>",
          "company": "<string>",
          "country": "<string>",
          "city": "<string>",
          "list": {
            "id": "<string>",
            "name": "<string>",
            "url": "<string>",
            "mode": "<string>",
            "referrals": true,
            "color": "<string>",
            "title": "<string>",
            "desc": "<string>"
          },
          "audiences": "<array>",
          "referralLink": "<string>",
          "privateLink": "<string>"
        }
      ]
    }
  }
}

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

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

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