Headers of https://www.checkheaders.com/

HTTP/1.1 200 OK
Date
Sun, 19 Mar 2023 09:37:56 GMT
Server
Apache
Upgrade
h2
Connection
Upgrade, close
Cache-Control
max-age=600
Expires
Sun, 19 Mar 2023 09:47:56 GMT
Vary
Accept-Encoding,User-Agent
Content-Length
5087
Content-Type
text/html; charset=UTF-8