Integrating Inbound SMS Messaging with Slack

  • An AWS account with Admin Privileges.
  • An Atmosphere SmartFlows account.
  • A Slack account.
  • cURL or PostMan to test the API Endpoint (Optional).
Create a Slack App

Slack apps provide the packing for any functionality you wish to implement through Slack.

  1. Create a Slack workspace.
  2. Click on the Administration -> Manage apps.

3.  Select Build.

4.  Click the green Start Building button.

5.  A new window, titled “Create a Slack App”, will pop up. Enter a name for your app and assign it to your team.

6.  Click on Create App, and you will be brought to your application’s configuration section.


7.  Add the Slack Inbound Webhook feature.

8.  Set Activate Incoming Webhooks to On.

9.  Scroll Down and click Add New Webhook to Workspace.

10.  Select the Slack Workspace where the messages should go and authorize the Slack app to post messages there.

11.  A new Webhook will be added to your BOT. Note the Webhook URL. You will need it later to when configuring your SmartFlow.

12.  Navigate to the SmartFlow receiving your inbound message.


13.  Add a new EXTERNAL WEB CALL.

14.  Click on the action you just placed on the pallete and configure as follows:

  • Method: POST.
  • URL OF SERVICE: Enter your Slack Webhook URL here.
  • BODY: {“text”: “$ISMS_1.message”}.

15.  SAVE and DEPLOY your updated flow.

Test Your Command

Once you have saved and deployed your flow, to test, simply send an SMS message to the number assigned to your SmartFlow.