ActionSlackUpdated May 2026

How do I list every Slack channel?

Short answer: Drop the "Slack → List Channels" 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 Types types	options	Optional	Which types of channels to include
Limit limit	string	Optional	Number of channels to return (max 1000)
Exclude Archived exclude_archived	options	Optional	Exclude Archived. Options: Yes, No

Sample request

{
  "types": "{{trigger.types}}",
  "limit": "100",
  "exclude_archived": "{{trigger.exclude_archived}}"
}

Returns

{
  "ok": true,
  "channels": [
    {
      "id": "C1234567890",
      "name": "general",
      "is_private": false,
      "num_members": 42
    }
  ]
}

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

Triggered by

Apps that pair well as the trigger for List Channels.

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 List Channels.

What does the List Channels action do in Slack?

Lists public and/or private channels in the Slack workspace. Used to populate a channel picker before posting.

What inputs does List Channels require?

List Channels has no required inputs. Sensible defaults are applied if you leave fields blank.

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 List Channels support batch operations?

Yes. Run List Channels 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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