On-Demand Announcements: Share Slides to Slack Anytime
Sometimes you finish a slide and want to announce it immediately—not wait for a trigger or schedule. Notis webhooks let you manually send a Slack message when you're ready, giving you control over timing and messaging.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Post message to channel
Deprecated: posts a message to a slack channel, direct message, or private channel. use `send message` instead.
Why this helps
Slide updates happen at unpredictable times and scheduling automations feels like overkill for ad-hoc sharing.
- Send announcements only when you choose
- No delays or schedules—real-time sharing
- Full control over timing and message content
Setup
Build it in a few focused steps.
- 1Connect Google Slides and Slack.
- 2Create an automation called 'Announce slide on demand'.
- 3Enter: 'When I send a webhook with slide details, post a message to #announcements with the presentation title and description.'
- 4Select 'Webhook' as the trigger type and save.
- 5Copy your webhook URL—you can now send announcements by hitting that URL whenever you finish a key slide.
Questions about this workflow
How do I trigger the webhook?
Notis gives you a unique URL. Call it from a button, a custom script, or a tool integration—any method works.
Can I include custom details in the message?
Yes. Your webhook can pass data like title, link, or notes, and Notis will include them in the Slack message.
Is this only for slides or can I use it for other announcements?
The automation is designed for slides, but you can adapt the webhook for any ad-hoc announcement need.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Slides to Slack. A trigger fires from one place; an action lands in another.
Google Slides triggers
Slack actions
New Slide Added
Fires when a new slide is added to a Google Slides presentation.
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
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.
Not just Google Slides and Slack. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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