Send Slack alerts triggered by external webhooks
Tools outside Google Sheets often need to trigger team notifications. Notis accepts webhooks from external apps and posts alerts to Slack, letting any tool feed notifications into your team's chat without custom integration code.
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
Many tools can send webhooks but lack native Slack integration. Building custom webhooks to Slack takes developer time and fragile code.
- Connect external tools to Slack without custom code
- Centralize notifications from multiple platforms
- Reduce development effort for integrations
- Keep all alerts in one place (Slack)
Setup
Build it in a few focused steps.
- 1Connect Google Sheets and Slack to Notis.
- 2Create an automation with this prompt: 'When you receive a webhook, parse the data and post a formatted message to #[channel-name].'
- 3Select 'Notis Webhook' as the trigger.
- 4Notis will generate a unique webhook URL for this automation.
- 5Point your external tool to this webhook URL and test by sending a sample webhook from your tool.
Questions about this workflow
How do I get the webhook URL?
Notis generates a unique URL when you create a webhook-triggered automation. Copy this URL into your external tool's webhook settings.
Can I send any data structure via webhook?
Yes. Send JSON data and describe in your prompt how you want it formatted for Slack: 'Extract the alert_level and message fields and post them.'
What tools can send webhooks?
Most modern tools support webhooks: GitHub, GitLab, Stripe, Zapier, custom scripts, and many SaaS platforms.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Sheets to Slack. A trigger fires from one place; an action lands in another.
Google Sheets triggers
Slack actions
Aggregate Metric Changed
Triggers when an aggregate metric (SUM/COUNT/AVG/MIN/MAX) changes in a Google Sheets spreadsheet. This trigger monitors an aggregate calculation on a target column (optionally filtered by a search column/value) and fires when the calculated result changes.
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
Cell Range Values Changed
Triggers when values in a specified A1 range change in Google Sheets. This trigger monitors a specific cell or range of cells and fires when any values change.
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.
Conditional Format Rule Changed
Triggers when conditional formatting rules change in a Google Spreadsheet. Detects when rules are added, updated, or removed. Uses snapshot-based diffing to detect changes between polls.
Add an emoji alias
Adds an alias for an existing custom emoji in a slack enterprise grid organization.
Data Validation Rule Changed
Triggers when data validation rules change (added/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
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.
Developer Metadata Changed
Triggers when developer metadata entries change (new/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
Add a star to an item
Stars a channel, file, file comment, or a specific message in slack.
Filtered Range Values Changed
Polling trigger that monitors Google Sheets filtered ranges for value changes. Uses snapshot-based diffing to detect when values matching a data filter change. Emits the matched values when changes are detected.
Add call participants
Registers new participants added to a slack call.
New Rows in Google Sheet
Simple polling trigger that monitors Google Sheets for new rows. Detects when new rows are added and returns the complete row data. Perfect for triggering any workflow based on new sheet entries.
Add emoji
Adds a custom emoji to a slack workspace given a unique name and an image url; subject to workspace emoji limits.
New Sheet Added in Google Spreadsheet
Polling trigger that detects when a new sheet is added to a Google Spreadsheet.
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 Sheets and Slack. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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