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Cerb + Slack


In this guide we’ll walk through the process of linking Cerb to Slack. You’ll be able to use Slack’s full API from bots in Cerb to automate whatever you need.

Create an app at Slack

Next, you need to create a new app on Slack for Cerb to connect to.

  1. Log in to Slack’s developer portal.

  2. Click the green Create New App button.

  3. Enter the following details:
    • App Name: Cerb
    • Development Slack Team: (your team name)
  4. Click the Create App button.

  5. Scroll down to App Credentials and make a note of your Client ID and Client Secret for the next step.

  6. Select OAuth & Permissions from the left sidebar.

  7. Click the Add Redirect URL button and enter the base URL to your Cerb install (e.g. https://YOUR-CERB-HOST/).

Create the Slack service in Cerb

  1. Navigate to Setup » Configure » Import Package.

  2. Paste the following package:

       "package": {
         "name": "Slack Connected Service",
         "revision": 1,
         "requires": {
           "cerb_version": "9.1.0",
           "plugins": []
         "configure": {
           "placeholders": [],
           "prompts": [
               "type": "text",
               "label": "Client ID",
               "key": "prompt_client_id",
               "params": {
                 "default": "",
                 "placeholder": "(paste your Client ID)"
               "type": "text",
               "label": "Client Secret",
               "key": "prompt_client_secret",
               "params": {
                 "default": "",
                 "placeholder": "(paste your Client Secret)"
       "records": [
           "uid": "service_slack",
           "_context": "connected_service",
           "name": "Slack",
           "extension_id": "cerb.service.provider.oauth2",
           "params": {
             "grant_type": "authorization_code",
             "client_id": "{{{prompt_client_id}}}",
             "client_secret": "{{{prompt_client_secret}}}",
             "authorization_url": "",
             "access_token_url": "",
             "resource_owner_url": "",
             "scope": "channels:read chat:write:bot chat:write:user im:read im:write users:read users.profile:read",
             "approval_prompt": "auto"
           "uid": "account_slack",
           "_context": "connected_account",
           "name": "Slack",
           "service_id": "{{{uid.service_slack}}}",
           "owner__context": "",
           "owner_id": "0",
           "params": {}
  3. Click the Import button.

  4. Enter your client ID and secret from Slack.

  5. Click the Import button again.

Link the connected account to Slack in Cerb

  1. Click on the Slack bubble in the Connected Accounts section after importing the above package.

  2. Click on the Edit button in the card popup.

  3. Click the blue Link to Slack button.

  4. Accept consent on Slack.

  5. Click the Save Changes button.

Use the connected account in bot behaviors

You can use the connected account you just created to access Slack’s API from bot behaviors in Cerb. This is typically accomplished using the Execute HTTP Request action from a bot, and selecting the connected account in the Authentication: section.

You can import the Slack Bot package for a working example.