Connect Any Tool to Slack via Webhook
Notis webhooks let you trigger Slack messages from any external source, giving you flexibility to automate beyond Google Drive. Post to Slack from scripts, custom tools, or other services.
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
Neurodivergent founders build custom workflows and use specialized tools that do not have Slack integrations. Webhooks fill the gap, but setting them up requires development effort.
- Connect any external tool or script to Slack via a simple webhook
- Avoid complex API setup for one-off integrations
- Build custom workflows that post to Slack on demand
- Keep all communications in one place
Setup
Build it in a few focused steps.
- 1Connect Slack to Notis (one-time setup).
- 2Create a new Notis automation using a webhook trigger by asking Notis 'Create a webhook that posts to Slack' or use the portal.
- 3Name your automation and choose the Slack channel where messages will appear.
- 4Notis will give you a unique webhook URL - copy it.
- 5In your external tool or script, configure it to POST to that URL with a message payload, and messages will appear in Slack.
Questions about this workflow
Do I need to know how to code to use webhooks?
Basic webhook setup requires minimal technical skill - you just need to copy the URL into your tool's configuration. Complex message formatting might benefit from developer help.
Can I customize the message format from the webhook?
Yes. Describe the format in your automation prompt, and Notis will parse the webhook payload and format the Slack message accordingly.
Is there a rate limit on webhook calls?
Webhooks have standard rate limits. Describe your use case to Notis and it will advise on any limits.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Drive to Slack. A trigger fires from one place; an action lands in another.
Google Drive triggers
Slack actions
Comment Added (Docs/Sheets/Slides)
Triggers when a new comment is added to Google Docs, Sheets, or Slides.
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
File Created
Triggers when a new file is created in Google Drive.
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.
File Deleted or Trashed
Triggers when a file is moved to trash or permanently deleted in Drive.
Add an emoji alias
Adds an alias for an existing custom emoji in a slack enterprise grid organization.
File Shared (Permissions Added)
Triggers when new sharing permissions are granted to a file or folder. Uses Drive's `changes.list` endpoint with inline `permissions` in the `fields` mask so each change carries the file's current permission set provider-atomically. We diff that against `seen_permission_keys` to identify newly added grants. Drive page tokens are the primary cursor; if Drive rejects a stored token, the trigger raises `PollingTriggerError` without clearing state rather than silently re-baselining and dropping events. Limitation: truly ephemeral permissions (added and revoked between two polls without any other file modification in between) are not detected. Drive Activity API would catch those but requires an additional OAuth scope and a different payload contract.
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.
File Updated
Triggers when a file's metadata or content changes in Google Drive.
Add a star to an item
Stars a channel, file, file comment, or a specific message in slack.
Google Drive Changes
Triggers when changes are detected in a Google Drive.
Add call participants
Registers new participants added to a slack call.
New File Matching Query
Triggers when a new Google Drive file matches a provided query. This is the legacy query-centric trigger: it preserves Drive API query config such as ``corpora`` / ``driveId`` aliases and emits the historical ``file_matching_query`` event type. ``FileCreatedTrigger`` covers the broader "new file" case and emits ``file_created``.
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 Drive and Slack. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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