# Reply to Slack Command
URL: /reference/blocks/slack-reply-to-command
Type: reference
Description: Reply to the Slack slash command that started this workflow
Keywords: reply to slack command, slack/reply-to-command, integrations, slack, block, workflow builder
`slack/reply-to-command` — Reply to the Slack slash command that started this workflow.

Where it appears [#where-it-appears]

The **Reply to Slack Command** block lives in the **Integrations** group of the Workflow Builder.

Fields [#fields]

| Field             | Type                                   | Required | Default     | Description                                                                                                                                               |
| ----------------- | -------------------------------------- | -------- | ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `text`            | text (multi-line, supports references) | No       | —           | Reply text. Supports Slack mrkdwn. When you also send blocks, this is the notification and screen-reader fallback. Use literal text or \<StepName.field>. |
| `responseType`    | select                                 | No       | `ephemeral` | Who sees the reply. Slack posts in-channel replies as a normal message in the channel the command was run in. Options: `ephemeral`, `in_channel`.         |
| `blocks`          | code                                   | No       | —           | Optional Block Kit blocks for a richer layout, as a JSON array (at most 50). Design them in Slack's Block Kit Builder.                                    |
| `replaceOriginal` | toggle                                 | No       | `false`     | Replace this workflow's previous reply to the command instead of adding a new message. Slack never replaces the user's own command.                       |
| `responseUrl`     | text (supports references)             | No       | —           | Leave blank to reply to the command that started this workflow. A response URL accepts at most 5 replies within 30 minutes of the command.                |

Inputs and outputs [#inputs-and-outputs]

Inputs are the configurable fields above. The block produces these outputs:

**Outputs**

Reference an output downstream with `<Reply To Slack Command.field>`.

| Name           | Type    | Description                        |
| -------------- | ------- | ---------------------------------- |
| `success`      | boolean | Whether Slack accepted the reply   |
| `responseType` | string  | Visibility the reply was sent with |

Example [#example]

A minimal configuration for this block:

```json
{
  "type": "slack/reply-to-command",
  "config": {
    "responseType": "ephemeral",
    "replaceOriginal": false
  }
}
```

Related [#related]

* [All workflow blocks](/reference/blocks)
* [Workflow Builder overview](/workflow-builder-overview)