Trello to Slack Notification Trigger: Task/Card Move Alerts

Sends a Slack notification whenever a Trello card is moved between lists on a specific board. Message format (bolded parts):
Task: *{{ $json.Task }}* moved from *{{ $json['Previous Step'] }}* to *{{ $json['New Step'] }}*

⚙️ Setup Instructions

1️⃣ Connect Trello (Developer API)

1. Get your API key here → Trello App Key
2. On the same page, generate a Token (click Token).
3. In n8n → Credentials → New → Trello API → paste API Key + Token, then save.
4. Open each Trello node (Get Board, Get Lists, Get Cards) and select your Trello credential.

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2️⃣ Connect Slack

1. Go to Slack API Apps and create a new app.
2. Add OAuth & Permissions → include scopes like:
   • chat:write (to send messages)
   • users:read (if targeting specific users)
3. Install the app to your workspace → copy the Bot User OAuth Token.
4. In n8n → Credentials → New → Slack OAuth2 API → paste the token and save.
5. In your Slack node (e.g., Send a message), select your Slack credential, and choose whether to send messages to a channel or a user.

3️⃣ Get Your Trello Board ID

Find your board’s shortlink in the URL (e.g. in https://trello.com/b/DCpuJbnd/administrative-tasks, the shortlink is DCpuJbnd).

Run this request in an HTTP node (replace placeholders with your values):

GET https://api.trello.com/1/boards/{BOARD_SHORTLINK}?fields=id&key={YOUR_TRELLO_KEY}&token={YOUR_TRELLO_TOKEN}

Copy the "id" from the response — that’s your board ID.

Paste it into the Trello Trigger node under Model ID.

📬 Contact

Need help customizing this workflow or building automations?

📧 [email protected]
🔗 Robert Breen
🌐 ynteractive.com