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Slack Integration Pack

Pack which allows integration with Slack service.


Copy the example configuration in [slack.yaml.example](./slack.yaml.example) to /opt/stackstorm/configs/slack.yaml` and edit as required.

  • post_message_action.webhook_url - Webhook URL.
  • post_message_action.channel - Channel to send the message to (e.g. #mychannel). If not specified, messages will be sent to the channel which is selected when configuring a webhook.
  • post_message_action.username - Default name of the user under which the messages will be posted. This setting can be overridden on per action basis.
  • post_message_action.icon_emoji - Default icon of the user under which the messages will be posted. This setting can be overridden on per action basis. If not provided, default value which is selected when configuring a webhook is used.
  • sensor.token - Authentication token used to authenticate against Real Time Messaging API.
  • sensor.strip_formatting - By default, Slack automatically parses URLs, images, channels, and usernames. This option removes formatting and only returns the raw data from the client (URL only today)

Obtaining a Webhook URL

To configure a webhook and obtain a URL, go to https://[your company].slack.com/services/new/incoming-webhook, select a channel you would like the messages to be posted to and click on "Add Incoming WebHooks Integration" button.

Step 1

On the next page you will find an automatically generated webhook URL.

Step 2

Obtaining Auth Token

To obtain a token for a production use, you should follow the instructions on the following page - OAuth - User Authentication.

For testing purposes, you can use the same token as your browser based client uses.

This is a lot simpler than going through the whole oAuth flow, but because of the obvious security reasons and a temporary natural of the token, you should only use that token for testing and debugging

To do that, navigate to your Slack instance, open Chrome developer console, go to Network tab, filter on XHR requests and refresh the page. Find a request to file.list or a similar endpoint and in the right page, under the Form Data section you will see auth token your client uses to authenticate.

Chrome developer console



Slack sensor monitors Slack for activity and dispatches a trigger for each message which is posted to a channel.

slack.message trigger

Example trigger payload:

    "user": {
        "first_name": "Tomaz",
        "last_name": "Muraus",
        "is_owner": false,
        "name": "kami",
        "real_name": "Tomaz Muraus",
        "is_admin": false,
        "id": "U0CCCCC"
    "channel": {
        "topic": "",
        "id": "C0CCCCCC",
        "name": "test"
    "timestamp": 1419164091,
    "timestamp_raw": "1419164091.00005",
    "text": "This is a test message."


  • post_message - Action which posts a message to the channel using an incoming webhook.