Trello to Slack Notification Trigger: Task/Card Move Alerts

Description

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

2️⃣ Connect Slack
Go to Slack API Apps and create a new app.
Add OAuth & Permissions → include scopes like:
chat:write (to send messages)
users:read (if targeting specific users)
Install the app to your workspace → copy the Bot User OAuth Token.
In n8n → Credentials → New → Slack OAuth2 API → paste the token and save.
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