curl --request POST \
  --url https://console.advinservers.com/api/v1/client/licenses/{license}/cancel \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "end_of_billing",
  "delete_floating_ip_uuids": []
}
'

import requests

url = "https://console.advinservers.com/api/v1/client/licenses/{license}/cancel"

payload = {
    "type": "end_of_billing",
    "delete_floating_ip_uuids": []
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({type: 'end_of_billing', delete_floating_ip_uuids: []})
};

fetch('https://console.advinservers.com/api/v1/client/licenses/{license}/cancel', 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://console.advinservers.com/api/v1/client/licenses/{license}/cancel",
  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([
    'type' => 'end_of_billing',
    'delete_floating_ip_uuids' => [
        
    ]
  ]),
  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://console.advinservers.com/api/v1/client/licenses/{license}/cancel"

	payload := strings.NewReader("{\n  \"type\": \"end_of_billing\",\n  \"delete_floating_ip_uuids\": []\n}")

	req, _ := http.NewRequest("POST", 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.post("https://console.advinservers.com/api/v1/client/licenses/{license}/cancel")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"type\": \"end_of_billing\",\n  \"delete_floating_ip_uuids\": []\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://console.advinservers.com/api/v1/client/licenses/{license}/cancel")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"type\": \"end_of_billing\",\n  \"delete_floating_ip_uuids\": []\n}"

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

{
  "uuid": "5d0c8f6e-3b1a-4e27-9f45-1c7a2b8d6e90",
  "type": "whmcs",
  "type_label": "WHMCS",
  "plan_name": "Plus",
  "name": "WHMCS Plus",
  "status": "pending_cancellation",
  "status_label": "Cancelling",
  "progress_message": null,
  "needs_funds": false,
  "awaits_staff": false,
  "license_key": "Leased-3f9a2c71e8b4d065",
  "is_suspended": false,
  "download_url": "https://download.whmcs.com/",
  "billing": {
    "service_id": 7452,
    "invoice_id": 16741,
    "invoice_url": null,
    "checkout_uuid": null,
    "invoice_status": "Paid",
    "amount": "27.60",
    "currency": "USD",
    "billing_cycle": "Monthly",
    "payment_due_at": null,
    "payment_window_minutes": 30,
    "paid_at": "2026-07-21T09:12:41+00:00"
  },
  "cancellation_type": "end_of_billing",
  "cancellation_requested_at": "2026-09-14T16:42:09+00:00",
  "autopay": false,
  "can_cancel": false,
  "can_withdraw_cancellation": true,
  "infrastructure_agreed_at": "2026-07-21T09:12:33+00:00",
  "issued_at": "2026-07-21T09:12:58+00:00",
  "created_at": "2026-07-21T09:12:33+00:00"
}

{
  "message": "The request could not be carried out."
}

{
  "message": "Unauthenticated."
}

{
  "message": "This API key is not allowed to do that in this team. It needs the \"snapshot.delete\" permission."
}

{
  "message": "Not found."
}

{
  "message": "The name field is required.",
  "errors": {}
}

{
  "message": "Too Many Attempts."
}