in EMQX software if I use "web_hook plugin" and I try to select Advanced Config there are two fields to fill in if I choose web hook only for message received:
+--------------------------------------------+
| web.hook.rule.message.publish.$name |
+--------------------------------------------+
+---------------------------------------------+
| web.hook.api.url |
+---------------------------------------------+
The second field is ok for me ...it's the API URL to redirect the request to but what I have to insert into the first field "web.hook.rule.message.publish.$name" ??
L.