Hi Koen,
Happy to help you with this one!
There’s multiple challenges about this one.
First: What you’re using as a Trigger (“Save an Item”) is not a Trigger, but an Action. You can identify triggers by the little “Acid” or “Instant” tag next to them:
Also, you can always check the public make .com Page about the integration, and filter for “Triggers”:
That way, you can find the actual triggers to use.
Second:
Sadly, there’s currently no event (In Make) that Slack triggers, when a message is saved.
You can see all the Events here:
What I would recommend:
Define an emoji reaction that, when added to a message, should transfer it to Todoist.
Then I would Use the trigger “New Event” from the Screenshot above, and define the Webhook that you see in this Screenshot:
Afterwards, I would filter by the Emoji that was used, and if it’s your “Task Emoji”, create a new todoist Task.
I hope, this will help!
Please let me know, if you need any more assistance or more details.