Acknowledge an image request in Slack
A webhook can carry the Slack message context while Cats helps Notis find an image that fits the request and conversation.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Add reaction to message
Adds a specified emoji reaction to an existing message in a slack channel, identified by its timestamp; does not remove or retrieve reactions.
Why this helps
Image requests and their eventual Slack posts can lose momentum when they take several manual steps.
- Connects an incoming image request with its Slack conversation.
- Acknowledges the target post with a lightweight reaction.
- Reduces manual context switching between image lookup and Slack.
Setup
Build it in a few focused steps.
- 1Connect Cats and Slack once in the Notis portal.
- 2Create an automation and describe the image lookup and message reaction outcome in one instruction.
- 3Pick a webhook as the trigger.
- 4Choose where Notis should send run reports.
- 5Test with one real image request and accessible Slack message.
Questions about this workflow
Will the image itself be posted in Slack?
No. This workflow adds a reaction to a specified existing message.
What information should the webhook include?
Include enough context to identify the relevant Slack message and describe the requested image.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Cats to Slack. A trigger fires from one place; an action lands in another.
Cats triggers
Slack actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Add a custom emoji to a Slack team
Deprecated: adds a custom emoji to a slack workspace given a unique name and an image url. use `add emoji` instead.
Add an emoji alias
Adds an alias for an existing custom emoji in a slack enterprise grid organization.
Add a remote file
Adds a reference to an external file (e.g., google drive, dropbox) to slack for discovery and sharing, requiring a unique `external id` and an `external url` accessible by slack.
Add a star to an item
Stars a channel, file, file comment, or a specific message in slack.
Add call participants
Registers new participants added to a slack call.
Add emoji
Adds a custom emoji to a slack workspace given a unique name and an image url; subject to workspace emoji limits.
Add reaction to message
Adds a specified emoji reaction to an existing message in a slack channel, identified by its timestamp; does not remove or retrieve reactions.
Connect any two apps with Notis in the middle.
Cats and Slack, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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