which makes it more interesting, although presumably one would have to read their docs for details.
healthchecks.io seems to have some advanced capabilities – plus extensive instructions on use:
Healthchecks.io Documentation where you can search for words like curl or email, likely matching
Duplicati Reporting options such as the send-http-* and send-mail-* options series respectively.
The simplest interface (no fancy stuff) looks easier than Discord’s, and curl might not be necessary.
A quick search in Duplicati GitHub Issues found an example shell script that might serve as a starter.
EDIT:
Direct links to curl (send-http-url might work too) and email docsumentation at Healthchecks.io.