Ask for OCR with a reaction
A simple reaction on an image post can ask Notis to extract its text, so you can keep moving without opening a separate request.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
ASTICA_READ_TEXT
Tool to perform ocr on an image to extract text. use when you need to read raw text from images after confirming the image source.
Why this helps
Requesting image transcription adds another message and another context switch to an already busy thread.
- Request text extraction with a lightweight signal.
- Keep the request attached to the relevant Slack post.
- Reduce extra coordination messages.
Setup
Build it in a few focused steps.
- 1Connect Slack and Astica ai to Notis once in the portal.
- 2Create the automation through the portal or ask Notis in plain language.
- 3Describe the instruction: when a designated reaction is added to a message with an image, use Astica ai OCR and report the text with message context.
- 4Choose Slack Message Reaction Added as the trigger and select where runs are reported.
- 5Test by reacting to one Slack message that contains an image.
Questions about this workflow
Can the trigger filter by emoji?
The Slack trigger supports optional channel and emoji filtering. The instruction should describe the intended image OCR outcome.
Will it run on reactions to messages without images?
Use an instruction focused on messages with an image, then test with the kind of post you expect.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Astica ai. A trigger fires from one place; an action lands in another.
Slack triggers
Astica ai actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Analyze Audio
Tool to analyze audio input for transcription. use when you need to convert an audio url or base64 string to text.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
ASTICA_READ_TEXT
Tool to perform ocr on an image to extract text. use when you need to read raw text from images after confirming the image source.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
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 Astica ai, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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