You can automatically notify blog directories and search engines that your (WordPress) blog has been updated by using ping services. Below goes the list of URLs to use in your blog/CMS/software in 2022.
XML-PRC ping services list
http://rpc.pingomatic.com/
http://bing.com/webmaster/ping.aspx
http://ping.blo.gs/
http://blog.goo.ne.jp/XMLRPC
http://blog.with2.net/ping.php
http://blogping.unidatum.com/RPC2
http://blogpingr.de/ping/rpc2
https://ping.blogs.yandex.ru/RPC2
http://blogsearch.google.ae/ping/RPC2
http://blogsearch.google.at/ping/RPC2
http://blogsearch.google.be/ping/RPC2
http://blogsearch.google.bg/ping/RPC2
http://blogsearch.google.ca/ping/RPC2
http://blogsearch.google.ch/ping/RPC2
http://blogsearch.google.cl/ping/RPC2
http://blogsearch.google.co.cr/ping/RPC2
http://blogsearch.google.co.hu/ping/RPC2
http://blogsearch.google.co.id/ping/RPC2
http://blogsearch.google.co.il/ping/RPC2
http://blogsearch.google.co.in/ping/RPC2
http://blogsearch.google.co.it/ping/RPC2
http://blogsearch.google.co.jp/ping/RPC2
http://blogsearch.google.co.ma/ping/RPC2
http://blogsearch.google.co.nz/ping/RPC2
http://blogsearch.google.co.th/ping/RPC2
http://blogsearch.google.co.uk/ping/RPC2
http://blogsearch.google.co.ve/ping/RPC2
http://blogsearch.google.co.za/ping/RPC2
http://blogsearch.google.com.ar/ping/RPC2
http://blogsearch.google.com.au/ping/RPC2
http://blogsearch.google.com.br/ping/RPC2
http://blogsearch.google.com.co/ping/RPC2
http://blogsearch.google.com.do/ping/RPC2
http://blogsearch.google.com.mx/ping/RPC2
http://blogsearch.google.com.my/ping/RPC2
http://blogsearch.google.com.pe/ping/RPC2
http://blogsearch.google.com.sa/ping/RPC2
http://blogsearch.google.com.sg/ping/RPC2
http://blogsearch.google.com.tr/ping/RPC2
http://blogsearch.google.com.tw/ping/RPC2
http://blogsearch.google.com.ua/ping/RPC2
http://blogsearch.google.com.uy/ping/RPC2
http://blogsearch.google.com.vn/ping/RPC2
http://blogsearch.google.com/ping/RPC2
http://blogsearch.google.de/ping/RPC2
http://blogsearch.google.es/ping/RPC2
http://blogsearch.google.fi/ping/RPC2
http://blogsearch.google.fr/ping/RPC2
http://blogsearch.google.gr/ping/RPC2
http://blogsearch.google.hr/ping/RPC2
http://blogsearch.google.ie/ping/RPC2
http://blogsearch.google.in/ping/RPC2
http://blogsearch.google.it/ping/RPC2
http://blogsearch.google.jp/ping/RPC2
http://blogsearch.google.ki/ping/RPC2
http://blogsearch.google.kz/ping/RPC2
http://blogsearch.google.la/ping/RPC2
http://blogsearch.google.li/ping/RPC2
http://blogsearch.google.lk/ping/RPC2
http://blogsearch.google.lt/ping/RPC2
http://blogsearch.google.lu/ping/RPC2
http://blogsearch.google.md/ping/RPC2
http://blogsearch.google.mn/ping/RPC2
http://blogsearch.google.ms/ping/RPC2
http://blogsearch.google.mu/ping/RPC2
http://blogsearch.google.mv/ping/RPC2
http://blogsearch.google.mw/ping/RPC2
http://blogsearch.google.nl/ping/RPC2
http://blogsearch.google.no/ping/RPC2
http://blogsearch.google.nr/ping/RPC2
http://blogsearch.google.nu/ping/RPC2
http://blogsearch.google.pl/ping/RPC2
http://blogsearch.google.pn/ping/RPC2
http://blogsearch.google.pt/ping/RPC2
http://blogsearch.google.ro/ping/RPC2
http://blogsearch.google.ru/ping/RPC2
http://blogsearch.google.rw/ping/RPC2
http://blogsearch.google.sc/ping/RPC2
http://blogsearch.google.se/ping/RPC2
http://blogsearch.google.sh/ping/RPC2
http://blogsearch.google.si/ping/RPC2
http://blogsearch.google.sk/ping/RPC2
http://blogsearch.google.sm/ping/RPC2
http://blogsearch.google.sn/ping/RPC2
http://blogsearch.google.st/ping/RPC2
http://blogsearch.google.tk/ping/RPC2
http://blogsearch.google.tl/ping/RPC2
http://blogsearch.google.tm/ping/RPC2
http://blogsearch.google.to/ping/RPC2
http://blogsearch.google.tp/ping/RPC2
http://blogsearch.google.tt/ping/RPC2
http://blogsearch.google.tw/ping/RPC2
http://blogsearch.google.us/ping/RPC2
http://blogsearch.google.vg/ping/RPC2
http://blogsearch.google.vu/ping/RPC2
http://blogsearch.google.ws/ping/RPC2
http://news2paper.com/ping
http://ping.bloggers.jp/rpc
http://ping.fc2.com
http://ping.rss.drecom.jp
http://rpc.bloggerei.de/ping/
http://rpc.pingomatic.com
http://rpc.technorati.com/rpc/ping
http://rpc.twingly.com
http://services.newsgator.com/ngws/xmlrpcping.aspx
http://api.feedster.com/ping
http://api.moreover.com/RPC2
http://api.moreover.com/ping
http://www.blogdigger.com/RPC2
http://www.blogshares.com/rpc.php
http://www.blogsnow.com/ping
http://www.blogstreet.com/xrbin/xmlrpc.cgi
http://bulkfeeds.net/rpc
http://www.newsisfree.com/xmlrpctest.php
http://ping.feedburner.com
http://ping.syndic8.com/xmlrpc.php
http://ping.weblogalot.com/rpc.php
http://rpc.blogrolling.com/pinger/
http://rpc.weblogs.com/RPC2
http://www.feedsubmitter.com
http://blo.gs/ping.php
http://www.pingerati.net
http://www.pingmyblog.com
http://geourl.org/ping
http://ipings.com
http://www.weblogalot.com/ping
http://rpc.pingomatic.com/
http://rpc.blogbuzzmachine.com/RPC2
http://ping.fc2.com/
http://blogs.yandex.ru/
http://rpc.bloggerei.de/
http://ping.blogs.yandex.ru/RPC2
http://ping.rss.drecom.jp/
http://rpc.odiogo.com/ping/
http://mod-pubsub.org/kn_apps/blogchatt
http://ping.amagle.com/
http://ping.bloggers.jp/rpc/
http://ping.exblog.jp/xmlrpc
http://bblog.com/ping.php
http://bitacoras.net/ping
http://blogdb.jp/xmlrpc
http://blogmatcher.com/u.php
http://coreblog.org/ping/
http://www.lasermemory.com/lsrpc/
http://ping.rootblog.com/rpc.php
http://pingoat.com/goat/RPC2
http://topicexchange.com/RPC2
http://trackback.bakeinu.jp/bakeping.php
http://www.bitacoles.net/ping.php
http://www.blogoole.com/ping/
http://www.blogpeople.net/servlet/weblogUpdates
http://www.mod-pubsub.org/kn_apps/blogchatter/ping.php
http://www.newsisfree.com/RPCCloud
http://www.snipsnap.org/RPC2
http://www.weblogues.com/RPC/
http://xmlrpc.blogg.de
http://rpc.twingly.com
http://www.blogsnow.com/ping
http://www.blogstreet.com/xrbin/xmlrpc.cgi
http://bulkfeeds.net/rpc
http://www.newsisfree.com/xmlrpctest.php
http://ping.blo.gs/
http://ping.feedburner.com
http://rpc.blogrolling.com/pinger/
http://rpc.technorati.com/rpc/ping
http://rpc.weblogs.com/RPC2
http://www.feedsubmitter.com
http://blo.gs/ping.php
http://www.pingmyblog.com