=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
cache-control: public, max-age=0, must-revalidate
content-length: 57
content-type: text/plain
date: Sat, 04 Dec 2021 12:19:43 GMT
x-nf-request-id: 01FP2P5JAEAT73EV7K9W3TTEME
location: https://userscripts.org/scripts/show/13502
server: Netlify
age: 0

HTTP/1.1 200 OK
cache-control: public, max-age=0, must-revalidate
content-length: 654
content-type: text/html; charset=UTF-8
date: Sat, 04 Dec 2021 12:19:44 GMT
etag: &quot;9efb412a7250576dd9054ab5d52f49dc-ssl&quot;
strict-transport-security: max-age=31536000
x-nf-request-id: 01FP2P5JYNESVJWZGA6XK06FR1
age: 0
server: Netlify

Request headers
================
HEAD /scripts/show/13502 HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: userscripts.org
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.