Remove outdated Docker Hub webhooks with Slack control
Keep webhook cleanup tied to an explicit message and repository context.
Trigger
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Action
Delete Docker Hub repository webhook
Tool to delete a specific webhook from a repository. Use when cleaning up outdated or misconfigured webhooks.
Why this helps
Old webhooks remain active because cleanup requests lose their implementation follow through.
- Makes cleanup requests actionable
- Keeps the repository context visible
- Reduces outdated integrations
Setup
Build it in a few focused steps.
- 1Connect Slackbot and Docker Hub once in Notis.
- 2Create an automation named Approved webhook removal.
- 3Tell Notis to delete the Docker Hub webhook identified in the Slack message only after the specified cleanup approval signal.
- 4Pick message reaction removed as the trigger and choose where run reports go.
- 5Test it with a disposable webhook and a documented cleanup reaction.
Questions about this workflow
Why use reaction removed as the trigger?
It can represent a deliberate cleanup signal when your team uses that convention.
Can it remove every webhook?
No, it should target the specific webhook identified in the message.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slackbot to Docker hub. A trigger fires from one place; an action lands in another.
Slackbot triggers
Docker hub actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Add Organization Member
Tool to send an invitation for a user to join a Docker Hub organization. Use when you need to grant membership by inviting a user via their username after choosing the appropriate role.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Create Docker Hub Organization
Tool to create a Docker Hub organization. Use when you need to programmatically instantiate a new namespace for organizing repositories.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Create Docker Hub Repository
Tool to create a Docker Hub repository under a namespace. Use when you need to programmatically instantiate a new repo under your organization or user.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Create Docker Hub Webhook
Tool to create a webhook on a Docker Hub repository. Use after determining repository details.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Delete Repository Image
Tool to delete a specific image within a Docker Hub repository. Use when you have confirmed the namespace, repository, and image ID to remove.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Delete Docker Hub Organization
Tool to delete a specific Docker Hub organization. Use when you need to permanently remove an organization. Deletion is irreversible.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Delete Docker Hub Repository
Tool to delete a specific Docker Hub repository. Use when you need to permanently remove a repository. Deletion is irreversible.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Delete Repository Tag
Tool to delete a specific tag from a Docker Hub repository. Use after confirming the tag to remove.
Connect any two apps with Notis in the middle.
Slackbot and Docker hub, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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