The most popular full node implementations in Bitcoin Cash are supporting -blocknotify: Bitcoin Cash Node and Bitcoin Unlimited. As a matter of fact: -blocknotify is so useful that several cryptocurrencies are using it.
Bitcoin Cash Node
“We are implementing faster blocknotify system on our servers, you might see small downtimes on EU, US, and asia stratum.. Mine-eu and mine-us are fine..”
BlockNotify does what you think it does.