my $client = Regru::API->new(
  username => 'login',
  password => 'pass',
);

my %params = (
  'domains' => @domains
);

my $resp = $client->domain->check(%params);
if ($resp->is_success) {
  # Обрабатываем ответ
} else {
  say "Request error: " . $resp->error_text . " (Code: " . $resp->error_code . ")";
}

Error: service failed: cant connect to api.reg.ru:443

Bad address at LWP/Protocol/http.pm line 47, <$wf> line 1.
At regru/api/response.pm line 75.
Request error: API response error (Code: API_FAIL)