I had an issue getting notified on new manga chapters, so i built a discord bot that notifies you on new chapter releases. It is open source and free to use. You can add it to your own server or just use it in the bot support server. You can see more details in top.gg, or just browse the README...
NPMjs Wrapper module that covers mangadex GET endpoints that dont require authorization.
NPM: https://www.npmjs.com/package/mangadex-wrapper
Docs: https://darkgoatie.github.io/mangadex-wrapper/docs
Github repo: https://github.com/Darkgoatie/mangadex-wrapper