ActionSlackUpdated May 2026

How do I invite users to a Slack channel?

Short answer: Drop the "Slack → Invite to Channel" action anywhere in your workflow, map the inputs from upstream nodes, and publish.

Use this action All 45 Slack 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
Channel ID channel	string	Required	Slack channel ID (starts with C for public, G for private group, D for DM). Find via List Channels. Not the channel name with #.
User IDs users	string	Required	Comma-separated list of user IDs to invite

Sample request

{
  "channel": "C1234567890",
  "users": "e.g. U1234567890,U0987654321"
}

Returns

{
  "ok": true,
  "channel": {
    "id": "C1234567890",
    "name": "project-alpha"
  }
}

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

Triggered by

Apps that pair well as the trigger for Invite to Channel.

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

Gmail → Slack

1 Gmail triggers

Google Sheets → Slack

2 Google Sheets triggers

FAQ

Questions about Invite to Channel.

What does the Invite to Channel action do in Slack?

Invites one or more users to a Slack channel by user ID. Used to auto-add stakeholders to project channels or to bring an on-call engineer into an incident war room.

What inputs does Invite to Channel require?

Required: Channel ID, User IDs. 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 Slack 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 Invite to Channel support batch operations?

Yes. Run Invite to Channel inside a Loop node to process arrays. Tiny Command handles Slack's rate limits automatically so you don't have to throttle manually.

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