WP_Http is a: Core class used for managing HTTP transports and making HTTP requests. so it should most likely be this link: https://developer.wordpress.org/reference/classes/wp_http/ instead of: https://developer.wordpress.org/reference/functions/WP_Http that redirects you to: https://developer.wordpress.org/reference/functions/wp_http_supports/ Then there are wrappers like wp_remote_get(), wp_remote_post(), wp_safe_remote_get(), wp_safe_remote_post(), wp_remote_retrieve_response_code(), download_url(), … etc, that makes it easier to use. Check out e.g. the HTTP … Read more