Trello trigger

Overview

The Trello Trigger node listens for webhook events from Trello. It watches a specific model (board, list, or card) identified by its ID and fires whenever actions occur on that model. Trello delivers action payloads containing the action type (e.g., createCard, updateCard, moveListFromBoard), the member who performed it, and the affected model data. The trigger handles Trello’s HEAD verification request automatically. Use this to start workflows based on any Trello activity such as card creation, movement, comments, member changes, label updates, checklist modifications, and more.

Node Type

Trigger — webhook (receives incoming HTTP callbacks)

Input / Output

Direction	Port(s)
Input	None (trigger node)
Output	Output

Credentials

This tool requires Trello API credentials. See the Credentials Guide for setup instructions.

Parameters

Parameter	Type	Required	Default	Description
Model ID	string	Yes	—	ID of the Trello board, list, or card to watch for events. You can find this in the URL when viewing the item on Trello.

Output Data

Each Trello action on the watched model produces one output item:

• action — the full Trello action object
• model — the full Trello model (board, list, or card) the action applied to
• actionType — the action type, e.g. createCard, updateCard, commentCard
• actionId — the ID of the action
• actionDate — the timestamp Trello recorded for the action
• memberCreator — the Trello member who performed the action
• actionData — the action’s data payload (the changed fields, card, list and board references)
• modelId — the ID of the watched model
• modelName — the name of the watched model
• _trigger — always trello_webhook
• _timestamp — ISO 8601 timestamp of when the action was received
• _webhookEvent — the same value as actionType

Every action type on the model is delivered, so filter downstream on actionType when you only care about some of them.

Reference the payload downstream by expression, e.g. {{ $json.actionData.card.name }}.

Example Configuration

Watch a board for all activity:

{
  "type": "trello_trigger",
  "parameters": {
    "modelId": "4d5ea62fd76aa1136000000c"
  }
}

Watch a single card:

{
  "type": "trello_trigger",
  "parameters": {
    "modelId": "5f8a1b2c3d4e5f6a7b8c9d0e"
  }
}

Trigger Behavior

• Activation: When the workflow is activated, a webhook endpoint is registered with the service.
• Deactivation: The webhook is automatically unregistered when the workflow is deactivated.
• Payload: The incoming webhook payload is parsed and output as workflow items.
• Verification: Supports signature verification where applicable.

Tips

This tool receives Trello events for a watched board, list, or card. It is ideal for starting workflows based on any Trello activity, rather than polling or manual checks. It produces a trigger whenever actions occur on the specified Trello model.