Reopen category choices when an event direction changes
When a teammate removes the approval marker, Notis brings back category options for a clean reassessment.
Trigger
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Action
Get Event Categories
Tool to retrieve event categories. use when selecting a category for an event. localizes results via optional locale parameter.
Why this helps
A changed decision can leave stale classification assumptions buried in the original Slack thread.
- Makes reversals visible and actionable
- Prevents old category choices from lingering unnoticed
- Provides alternatives without restarting research manually
Setup
Build it in a few focused steps.
- 1Connect Slack and Eventbrite to Notis once.
- 2Ask Notis to retrieve Eventbrite categories when the approval emoji is removed from an event proposal.
- 3Select Message Reaction Removed, choose the run-report channel, and test by removing the emoji from one proposal.
Questions about this workflow
Why use reaction removal as a trigger?
It provides a simple shared signal that the earlier classification decision needs review.
Can this be restricted to one channel?
Yes. Include the proposal channel in the instruction.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Eventbrite. A trigger fires from one place; an action lands in another.
Slack triggers
Eventbrite actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Get Event Categories
Tool to retrieve event categories. use when selecting a category for an event. localizes results via optional locale parameter.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Get Event Formats
Tool to list event formats. use when you need the available formats before creating or updating an event.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Get Event Subcategories
Tool to list all event subcategories. use when fetching available subcategory options, optionally filtered by locale after selecting a category.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
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.
Slack and Eventbrite, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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