curl --request POST \
  --url https://api.cloudhumans.com/cloudchat/v1/accounts/{accountId}/campaigns/preview-recipients \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'cloudchat-instance: <cloudchat-instance>' \
  --data '
{
  "channel": "whatsapp",
  "audience": [
    {
      "type": "Label",
      "id": 20010
    }
  ]
}
'

import requests

url = "https://api.cloudhumans.com/cloudchat/v1/accounts/{accountId}/campaigns/preview-recipients"

payload = {
    "channel": "whatsapp",
    "audience": [
        {
            "type": "Label",
            "id": 20010
        }
    ]
}
headers = {
    "cloudchat-instance": "<cloudchat-instance>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'cloudchat-instance': '<cloudchat-instance>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({channel: 'whatsapp', audience: [{type: 'Label', id: 20010}]})
};

fetch('https://api.cloudhumans.com/cloudchat/v1/accounts/{accountId}/campaigns/preview-recipients', 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.cloudhumans.com/cloudchat/v1/accounts/{accountId}/campaigns/preview-recipients",
  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([
    'channel' => 'whatsapp',
    'audience' => [
        [
                'type' => 'Label',
                'id' => 20010
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "cloudchat-instance: <cloudchat-instance>"
  ],
]);

$response = curl_exec($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.cloudhumans.com/cloudchat/v1/accounts/{accountId}/campaigns/preview-recipients"

	payload := strings.NewReader("{\n  \"channel\": \"whatsapp\",\n  \"audience\": [\n    {\n      \"type\": \"Label\",\n      \"id\": 20010\n    }\n  ]\n}")

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

	req.Header.Add("cloudchat-instance", "<cloudchat-instance>")
	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.post("https://api.cloudhumans.com/cloudchat/v1/accounts/{accountId}/campaigns/preview-recipients")
  .header("cloudchat-instance", "<cloudchat-instance>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"channel\": \"whatsapp\",\n  \"audience\": [\n    {\n      \"type\": \"Label\",\n      \"id\": 20010\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.cloudhumans.com/cloudchat/v1/accounts/{accountId}/campaigns/preview-recipients")

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

request = Net::HTTP::Post.new(url)
request["cloudchat-instance"] = '<cloudchat-instance>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"channel\": \"whatsapp\",\n  \"audience\": [\n    {\n      \"type\": \"Label\",\n      \"id\": 20010\n    }\n  ]\n}"

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

{
  "total": 1240,
  "reachable": 1187
}

{
  "error": {
    "code": "bad_request",
    "message": "The request is malformed."
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Authentication is required. Send a valid Bearer token in the Authorization header."
  }
}

{
  "error": {
    "code": "forbidden",
    "message": "You do not have permission to perform this action."
  }
}

{
  "error": {
    "code": "not_found",
    "message": "Resource could not be found."
  }
}

{
  "error": {
    "code": "validation_failed",
    "message": "The request payload is invalid.",
    "details": [
      {
        "field": "short_code",
        "code": "taken",
        "message": "has already been taken"
      }
    ]
  }
}

{
  "error": {
    "code": "rate_limited",
    "message": "Too many requests. Try again in a moment."
  }
}

{
  "error": {
    "code": "internal_error",
    "message": "An unexpected error occurred. Please try again later."
  }
}