Make a reaction the signal for an availability check
Notis can turn a deliberate Slack reaction into an inventory check, helping the team resolve availability before the discussion moves on.
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 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.
Why this helps
Unclear ownership of availability research can leave a group discussing an option that may not work on the planned date.
- Give one team member a low-friction way to request a check.
- Verify inventory for a concrete variant before committing more discussion time.
- Make availability follow-up visible to the group.
Setup
Build it in a few focused steps.
- 1Connect Slack and Headout once in the portal.
- 2Create an automation that asks Notis to read the marked message for a product variant and date, check Headout inventory and pricing, and report the result.
- 3Choose Slack Message Reaction Added and set the intended reaction filter if available.
- 4Pick the run-report channel and test with one marked message containing a real variant and date.
Questions about this workflow
Can a reaction supply missing dates?
No. The prompt should have Notis ask for the date if it is not present in the message context.
Does the check hold inventory?
No. It only retrieves inventory and pricing at the time of the lookup.
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
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