Keep reaction-based status current
When a reaction is removed from a Slack message, notify your Ably subscribers so they can reassess the signal.
Trigger
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Action
Publish Message to Channel
This tool will allow users to publish a message to a specified ably channel using a post request. it covers the essentials like channel name, message data, optional event name/type, and additional metadata for push notifications. it is an independent and fundamental operation within ably's real-time messaging platform.
Why this helps
Removing a reaction can change the meaning of a message, but connected workflows may continue using the old status.
- Tell subscribers when a reaction-based signal changes.
- Reduce stale status in connected tools.
- Avoid manually explaining a removed acknowledgement.
Setup
Build it in a few focused steps.
- 1Connect Slack and Ably to Notis once through the portal.
- 2Describe which removed reaction should cause an Ably status-change event.
- 3Select Message Reaction Removed as the trigger and choose a run-report channel.
- 4Remove the chosen reaction from one real message to test.
Questions about this workflow
Can removal undo an earlier event?
The action publishes a new event describing the removal. Whether that reverses earlier state depends on the connected subscriber.
Which reaction should I track?
State the relevant emoji and its meaning in the automation prompt.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Ably. A trigger fires from one place; an action lands in another.
Slack triggers
Ably actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Query Batch Presence
This tool enables querying the presence states of multiple channels in a single api request. the api retrieves the member presence details of the specified channels in parallel.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Query Batch Presence History
This tool enables querying presence history for multiple channels in a single api request. it uses the get endpoint at https://rest.ably.io/presence to retrieve the member presence history details of the specified channels in parallel.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Create Ably Channel
Creates a new channel or retrieves an existing channel in ably. this tool allows you to programmatically create and initialize channels for real-time messaging. since ably creates channels implicitly when first used, this action publishes an empty initialization message to create/activate the channel.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Delete Channel Subscription
This tool allows you to unsubscribe devices or clients from push notifications for specific channels. the operation is asynchronous, so immediate requests after deletion may briefly still return the subscription.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Get Channel Details
This tool retrieves metadata and details for a specific channel in ably. it returns a channeldetails object containing information about the channel's status, occupancy, and other metadata. the endpoint provides visibility into channel activity, including metrics such as connections, presence, publishers, and subscribers, and requires appropriate permissions.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Get Channel History
This tool retrieves the message history for a specified ably channel. it uses the get /channels/{channelid}/messages endpoint to return a paginated list of messages in chronological order, subject to parameters such as 'channelid', 'limit', 'direction', 'start', and 'end'. the tool is useful for auditing, recovering missed messages, analyzing channel activity, and debugging message flows. authentication is required via basic or token authentication.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Get Channel Presence History
This tool retrieves the history of presence messages for a specified channel in ably. it allows you to query presence events on a channel within a given time period.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Get Ably Service Time
This tool retrieves the current server time from ably's service in milliseconds since the epoch. it is particularly useful for time synchronization and generating valid tokenrequest timestamps to prevent replay attacks. the endpoint supports multiple content types, handles http errors, network issues, and is a fundamental tool for ensuring accurate timing in ably applications.
Connect any two apps with Notis in the middle.
Slack and Ably, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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