ActionTrelloUpdated May 2026

How do I add a label to a Trello card?

Short answer: Drop the "Trello → Add Label to Card" action anywhere in your workflow, map the inputs from upstream nodes, and publish.

Use this action All 21 Trello actions

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
Card ID cardId	string	Required	Card ID
Label ID labelId	string	Required	Label ID. Example: 5abbe4b7...

Sample request

{
  "cardId": "{{trigger.cardId}}",
  "labelId": "e.g. 5abbe4b7..."
}

Returns

[
  "label123",
  "label456"
]

Use these fields in downstream nodes for routing, logging, or error handling.

Triggered by

Apps that pair well as the trigger for Add Label to Card.

Any of these apps can fire this action as part of a workflow.

Google Sheets → Trello

2 Google Sheets triggers

HubSpot → Trello

18 HubSpot triggers

FAQ

Questions about Add Label to Card.

What does the Add Label to Card action do in Trello?

Adds a label to a Trello card by label ID. Use to tag cards based on their content (e.g. AI classification) or to auto-categorize new work.

What inputs does Add Label to Card require?

Required: Card ID, Label ID. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if Trello returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Add Label to Card support batch operations?

Yes. Run Add Label to Card inside a Loop node to process arrays. Tiny Command handles Trello's rate limits automatically so you don't have to throttle manually.

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