Slack Post

Slack Post

Certified

Post a Slack message

Sends a message with text, blocks, or attachments. Accepts either raw JSON payload or messageText; channel and thread can also come from the payload. Requires chat: write.

yaml
type: io.kestra.plugin.slack.app.chats.Post

Post a simple text message

yaml
id: slack_post_message
namespace: company.team

tasks:
  - id: post_message
    type: io.kestra.plugin.slack.app.chats.Post
    token: "{{ secret('SLACK_TOKEN') }}"
    channel: "#general"
    messageText: "Hello from Kestra!"

Post a message with custom payload

yaml
id: slack_post_custom
namespace: company.team

tasks:
  - id: post_message
    type: io.kestra.plugin.slack.app.chats.Post
    token: "{{ secret('SLACK_TOKEN') }}"
    channel: "#general"
    payload: |
      {
        "text": "Workflow completed successfully",
        "blocks": [
          {
            "type": "section",
            "text": {
              "type": "mrkdwn",
              "text": "*Status:* :white_check_mark: Success"
            }
          }
        ]
      }

Post a message to a thread

yaml
id: slack_post_thread
namespace: company.team

tasks:
  - id: post_message
    type: io.kestra.plugin.slack.app.chats.Post
    token: "{{ secret('SLACK_TOKEN') }}"
    channel: "#general"
    messageText: "Main message"

  - id: reply_message
    type: io.kestra.plugin.slack.app.chats.Post
    token: "{{ secret('SLACK_TOKEN') }}"
    channel: "#general"
    messageText: "Reply in thread"
    timestamp: "{{ outputs.post_message.timestamp }}"
Properties

Slack token

Channel to send message

Channel ID or name; can also be set inside the payload.

Message icon emoji

Emoji code (e.g., : wave: ) that overrides iconUrl.

Message icon URL

HTTPS image used as icon when iconEmoji is not provided.

Message Text or JSON String

The message content as a raw string. It can be plain text with markdown, or a JSON object. If not a valid JSON object, it is automatically wrapped in {"text": "..."}. This property is ignored if the payload property is set.

Slack message payload

Reference (ref) of the pluginDefaults to apply to this task.

Thread timestamp to reply to

Slack ts value for replying in a thread; must belong to the same channel.

Display username

Overrides the bot's default display name for this message.

Timestamp of posted message

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