Github : https://github.com/gbrindisi/xsssniper
xsssniper is an handy xss discovery tool with mass scanning functionalities.
Demo

Usage
xsssniper.py [options]
Options:
-h, --help show this help message and exit
-u URL, --url=URL target URL
--post try a post request to target url
--data=POST_DATA post data to use
--threads=THREADS number of threads
--http-proxy=HTTP_PROXY scan behind given proxy (format: 127.0.0.1:80)
--tor scan behind default Tor
--crawl crawl target url for other links to test
--forms crawl target url looking for forms to test
--user-agent=USER_AGENT provide an user agent
--random-agent perform scan with random user agents
--cookie=COOKIE use a cookie to perform scans
--dom basic heuristic to detect dom xss