In https://www.zabbix.com/documentation/4.0/manual/config/items/itemtypes/http , it might be helpful to be explicit about the fact that Zabbix server (or proxy) would be the one running the checks, similar how it is done in https://www.zabbix.com/documentation/4.0/manual/config/items/itemtypes/external .

While this fact can be determined from the page content, being explicit and consistent would make it more obvious.