Use a reaction to narrow activity research
Notis can turn a simple signal into a clear menu of activity directions for a city your team is considering.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
List Subcategories V2
Tool to fetch all subcategories for a specific city using V2 API. Use when you need to list subcategories of activities available in a particular city location.
Why this helps
Broad planning threads can expand into many possibilities without producing a clear next step.
- Narrow exploration to activity types available in the city.
- Use an explicit signal to avoid unnecessary searches.
- Give the group a smaller choice to discuss next.
Setup
Build it in a few focused steps.
- 1Connect Slack and Headout once via the Notis portal.
- 2Create an automation and instruct Notis to fetch and summarize Headout subcategories for the city in a reacted-to message.
- 3Choose Slack Message Reaction Added and configure the intended reaction filter where available.
- 4Set a run-report channel and test against one city discussion.
Questions about this workflow
Is a channel filter required?
It is optional, but filtering to the planning channel can keep the workflow focused if the trigger supports it.
Does this identify product availability?
No. It returns subcategories; use a variant inventory lookup for availability.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Headout. A trigger fires from one place; an action lands in another.
Slack triggers
Headout actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Get Product By ID
Tool to retrieve detailed product information by product ID. Use when you need comprehensive product details including pricing, images, location, variants, and availability.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
List Categories V2
Tool to fetch all available activity categories for a specific city using V2 API. Use when you need to list categories of activities available in a particular city location.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
List Cities
Tool to list all active cities with pagination support. Use when you need to retrieve available cities from the Headout platform. Supports pagination through offset and limit parameters.
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 Collections V2
Tool to fetch all collections for a specific city using V2 API with pagination support. Use when you need to browse collections available in a particular city, with optional language-specific content and pagination controls.
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 Inventory by Variant
Tool to retrieve available inventory and pricing for a specific product variant. Use when you need to check availability and pricing details for booking.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
List Products By Category
Tool to list product listings filtered by category ID with pagination support. Use when you need to retrieve products for a specific category.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
List Products V2
Tool to fetch products using Headout V2 API with filtering by city, collection, category, or subcategory. Use when you need to retrieve product listings for specific locations or categories with pagination support.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
List Subcategories V2
Tool to fetch all subcategories for a specific city using V2 API. Use when you need to list subcategories of activities available in a particular city location.
Connect any two apps with Notis in the middle.
Slack and Headout, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
Save your first hour today.
7-day trial of any paid plan, with 20$ of usage included.
No card. Works with personal or business Headout.