curl --request POST \
  --url https://collectwiseapi.com/dropVoicemail \
  --header 'Content-Type: application/json' \
  --header 'collectwise_key: <api-key>' \
  --data '
{
  "phoneNumber": "+18768828822",
  "message": "Hello, this is an important message regarding your account...",
  "callbackNumber": "+18768828823",
  "voiceGender": "female"
}
'

import requests

url = "https://collectwiseapi.com/dropVoicemail"

payload = {
    "phoneNumber": "+18768828822",
    "message": "Hello, this is an important message regarding your account...",
    "callbackNumber": "+18768828823",
    "voiceGender": "female"
}
headers = {
    "collectwise_key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {collectwise_key: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    phoneNumber: '+18768828822',
    message: 'Hello, this is an important message regarding your account...',
    callbackNumber: '+18768828823',
    voiceGender: 'female'
  })
};

fetch('https://collectwiseapi.com/dropVoicemail', 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://collectwiseapi.com/dropVoicemail",
  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([
    'phoneNumber' => '+18768828822',
    'message' => 'Hello, this is an important message regarding your account...',
    'callbackNumber' => '+18768828823',
    'voiceGender' => 'female'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "collectwise_key: <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://collectwiseapi.com/dropVoicemail"

	payload := strings.NewReader("{\n  \"phoneNumber\": \"+18768828822\",\n  \"message\": \"Hello, this is an important message regarding your account...\",\n  \"callbackNumber\": \"+18768828823\",\n  \"voiceGender\": \"female\"\n}")

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

	req.Header.Add("collectwise_key", "<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://collectwiseapi.com/dropVoicemail")
  .header("collectwise_key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"phoneNumber\": \"+18768828822\",\n  \"message\": \"Hello, this is an important message regarding your account...\",\n  \"callbackNumber\": \"+18768828823\",\n  \"voiceGender\": \"female\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://collectwiseapi.com/dropVoicemail")

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

request = Net::HTTP::Post.new(url)
request["collectwise_key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"phoneNumber\": \"+18768828822\",\n  \"message\": \"Hello, this is an important message regarding your account...\",\n  \"callbackNumber\": \"+18768828823\",\n  \"voiceGender\": \"female\"\n}"

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

{
  "message": "Voicemail delivered successfully"
}

{
  "code": 400,
  "message": "Invalid input: debtorName is required"
}

{
  "code": 400,
  "message": "Invalid input: debtorName is required"
}