ActionGmailUpdated May 2026

How do I add labels to a Gmail message?

Short answer: Drop the "Gmail → Add Labels to Message" action anywhere in your workflow, map the inputs from upstream nodes, and publish.

Use this action All 27 Gmail 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
Message ID messageId	string	Required	Gmail message ID — the hex string Gmail assigns to each message. Find via List Messages. Not the RFC822 Message-Id header.
Labels labelIds	dynamic-options	Required	Comma-separated Gmail label IDs. Find via List Labels.

Sample request

{
  "messageId": "e.g. 18a1b2c3d4e5f6",
  "labelIds": "e.g. INBOX,Label_1234567890"
}

Returns

{
  "id": "msg123",
  "labelIds": [
    "INBOX",
    "STARRED"
  ]
}

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

Triggered by

Apps that pair well as the trigger for Add Labels to Message.

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

Slack → Gmail

13 Slack triggers

Google Sheets → Gmail

2 Google Sheets triggers

FAQ

Questions about Add Labels to Message.

What does the Add Labels to Message action do in Gmail?

Adds one or more labels to an email message in Gmail. Use to file AI-classified mail, mark as Important/Starred, or move into a custom folder.

What inputs does Add Labels to Message require?

Required: Message ID, Labels. 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 Gmail 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 Labels to Message support batch operations?

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

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