Catch revoked webinar approvals from Slack
Keep registration changes visible when an approval reaction disappears.
Trigger
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Action
Demio Create Join Link
Tool to register an attendee and obtain their unique Demio join link. Use after confirming a valid event_id.
Why this helps
Approval reversals are easy to miss, leaving attendee access unclear and follow-up tasks unassigned.
- Surface changed approvals
- Reduce missed registration updates
- Create clear follow-up context
Setup
Build it in a few focused steps.
- 1Connect Slackbot and Demio in Notis once.
- 2Create an automation that reads the message tied to the removed reaction and checks the related Demio registration context.
- 3Pick Message Reaction Removed as the trigger.
- 4Choose where run reports go, then test by removing one real approval reaction.
Questions about this workflow
Can this cancel a Demio registration?
The available action retrieves or creates join-link information; cancellation is not an available Demio action here.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slackbot to Demio. A trigger fires from one place; an action lands in another.
Slackbot triggers
Demio actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Demio Create Join Link
Tool to register an attendee and obtain their unique Demio join link. Use after confirming a valid event_id.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Demio: Get Event by ID
Tool to retrieve event details by ID. Use when you need the full metadata for a specific Demio event.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
List Event Date Participants
Tool to list participants for a specific event date. Use after scheduling an event session to retrieve attendees.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
List Event Dates
Tool to list all scheduled session dates for a given Demio event. Use when you need the session schedule by event ID.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
List Demio Events
Tool to retrieve a list of Demio events. Use when you need to fetch events optionally filtered by type or paginated.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Demio API Ping
Tool to perform a health check on the Demio API. Use to verify the API is reachable before other calls.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Connect any two apps with Notis in the middle.
Slackbot and Demio, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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