Block disposable email in Laravel

The code

<?php
// app/Rules/NotDisposableEmail.php
namespace App\Rules;

use Closure;
use Illuminate\Contracts\Validation\ValidationRule;
use Illuminate\Support\Facades\Http;

class NotDisposableEmail implements ValidationRule
{
    public function validate(string $attribute, mixed $value, Closure $fail): void
    {
        try {
            $response = Http::timeout(5)
                ->withToken(config('services.piisend.key'))
                ->post('https://api.piisend.com/api/v1/intelligence/email', ['email' => $value]);

            if ($response->successful() && ($response->json('signals.disposable') === true)) {
                $fail('Please use a permanent email address.');
            }
        } catch (\Throwable $e) {
            // fail open
        }
    }
}

// app/Http/Requests/RegisterRequest.php
public function rules(): array
{
    return [
        'email' => ['required', 'email', new \App\Rules\NotDisposableEmail],
        'password' => ['required', 'confirmed', Rules\Password::defaults()],
    ];
}