Checks URLVoid.com for info on a domain

def urlvoid_check(name, api_key):
    """Checks URLVoid.com for info on a domain"""
    if not is_fqdn(name):
        return None

    url = 'http://api.urlvoid.com/api1000/{key}/host/{name}'.format(key=api_key, name=name)
    response = requests.get(url)
    tree = ET.fromstring(response.text)
    if tree.find('./detections/engines'):
        return [e.text for e in tree.find('./detections/engines')]
    else:
        return None