ActionSlackUpdated September 2026

How do I open a Slack DM channel with a user?

Short answer: You can open direct message in Slack by hand from its own interface, but it won’t repeat itself. On TinyCommand, add the Slack Open Direct Message action to a workflow, map its 1 input from any upstream app, and it runs automatically every time the trigger fires. No code, and a free tier to start.

Open Direct Message in Slack — start free All 45 Slack actions

Open Direct Message in Slack — start free

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
User IDs users	string	Required	Comma-separated user IDs for the DM

Sample request

{
  "users": "e.g. U012AB3CD"
}

Returns

{
  "ok": true,
  "channel": {
    "id": "D01234567"
  }
}

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

Triggered by

Apps that pair well as the trigger for Open Direct Message.

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 Open Direct Message.

What does the Open Direct Message action do in Slack?

Opens or returns an existing direct-message channel with a user. Returns the DM channel ID you'll use in subsequent post-message calls.

What inputs does Open Direct Message require?

Required: 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 run history shows the failed step with its input and the error message Slack returned, so you can fix the input and run the workflow again. Automatic retries are built into HTTP steps only, where you can also set your own retry count and delay.

Does Open Direct Message support batch operations?

Run Open Direct Message inside a loop to process each item in an array. TinyCommand does not throttle calls for you, so for large arrays add a Delay step if you need to stay within Slack's rate limits.

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