Invite Slack users from external webhooks
Your CRM onboards a new customer, or your project management tool flags a new contributor—an external webhook signals Notis, and the right people are automatically invited to the project Slack channel.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Invite users to a Slack channel
Invites users to an existing slack channel using their valid slack user ids.
Why this helps
Coordinating access across multiple tools requires manual effort and creates security gaps when invitations slip through the cracks.
- Automate access provisioning across your tech stack
- Keep Slack membership synchronized with external systems
- Reduce security risks from stale or missing access
- Eliminate manual invitation coordination
Setup
Build it in a few focused steps.
- 1Connect Slack to Notis
- 2Create a new automation with the prompt: 'When an external system sends a webhook about a new team member, invite them to the project Slack channel'
- 3Choose the trigger: Notis Webhook
- 4Notis provides a webhook URL to share with your external system
- 5Test by triggering the webhook from your external tool and verify the Slack invitation
Questions about this workflow
Can I map data from the webhook to the Slack invitation?
Yes. Your prompt tells Notis what to extract: 'use their email to find and invite them' or 'invite the person associated with this project'.
What if the user doesn't exist in Slack yet?
Notis can handle this in your prompt: 'send an email invitation' or 'notify the admin instead'.
Can I invite people to multiple channels from one webhook?
Absolutely. Your prompt can specify channel logic: 'add them to #general and their project channel'.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Discord to Slack. A trigger fires from one place; an action lands in another.
Discord triggers
Slack actions
New Discord Message Trigger
Polls a specific Discord channel for new messages.
Set snooze duration
Deprecated: turns on do not disturb mode for the current user, or changes its duration. use `set dnd duration` instead.
New Member Joined
Triggered when a new member joins a Discord server (guild) you manage.
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.
Message Reaction Added
Triggered when a reaction (emoji) is added to a message in a monitored Discord channel.
Add an emoji alias
Adds an alias for an existing custom emoji in a slack enterprise grid organization.
New Thread Created
Triggered when a new thread is created in a Discord channel within a monitored server.
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.
Message Edited
Triggered when an existing message in a monitored Discord channel is edited.
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 Discord and Slack. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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