Remind Your Slack Team When External Systems Fire
External tool sends a webhook. Notis receives it. Slack reminder lands automatically. Your team acts before the moment passes.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Create a reminder
Creates a slack reminder with specified text and time; time accepts unix timestamps, seconds from now, or natural language (e.g., 'in 15 minutes', 'every thursday at 2pm').
Why this helps
Important events in external systems (GitHub issues, form submissions, deployment alerts) don't trigger Slack actions—teams miss them until they check each tool manually.
- Bridges external tools (GitHub, Zapier, APIs) with Slack reminders
- Eliminates manual checking of external systems
- Puts urgent events in front of your team immediately
- Enables custom workflows beyond pre-built integrations
Setup
Build it in a few focused steps.
- 1Connect Slack to Notis.
- 2Create a new automation: 'Webhook reminders to Slack.'
- 3Tell Notis: 'When I send a webhook to you, create a Slack reminder with the message I send.'
- 4Select 'Webhook' as the trigger and Notis will provide you with a unique webhook URL.
- 5Test by sending a test webhook from your external tool (curl, Zapier, or a script) and verify the Slack reminder appears.
Questions about this workflow
What format should my webhook payload be in?
Mention your preferred format in the automation prompt (JSON, form data, etc.), and Notis will guide the parsing or adjust the expected format.
Can I send different reminders based on webhook data?
Yes. Describe the conditions in your prompt: 'if priority is high, remind immediately; if it's low, remind in 1 hour.'
Is the webhook URL secure?
Yes, it's unique to your automation. Treat it like an API key and don't share it publicly.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Coda to Slack. A trigger fires from one place; an action lands in another.
Coda triggers
Slack actions
Coda Document Deleted Trigger
Triggers when a Coda document is deleted.
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
New Coda Document Trigger
Triggers when a new Coda document is created.
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.
New Coda Page Trigger
Triggers when a new page is added to a Coda document.
Add an emoji alias
Adds an alias for an existing custom emoji in a slack enterprise grid organization.
Specific Coda Page Updated Trigger
Triggers when a specific page within a Coda document is updated.
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 Coda and Slack. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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