How to connect Bubble to Slack

The simplest way to connect Bubble to Slack is to create a Slack App in Slack, get an OAuth access token, and then use Bubble’s API Connector to send messages to Slack’s API (for example, to the chat.postMessage endpoint). Once set up, you can trigger Slack messages from any Bubble workflow or backend workflow.

What You Need

• A Slack workspace where you can create apps.
• Bubble’s API Connector plugin installed.
• A Slack Bot User OAuth Token that starts with xoxb-.

Step-by-Step Setup

Create a Slack App at https://api.slack.com/apps. Add a feature called Incoming Webhooks or enable the chat:write permission under OAuth & Permissions. Then install the app to your workspace and copy the Bot Token (xoxb...).

In Bubble, install the API Connector plugin and create a new API call. Set authentication to “None or self‑handled” because Slack uses Bearer tokens. Your call will be a POST request to Slack.

POST https://slack.com/api/chat.postMessage
Content-Type: application/json
Authorization: Bearer xoxb-your-token-here

{
  "channel": "C1234567890", // Channel ID, not the channel name
  "text": "New Bubble event happened!"
}

In the API Connector, map the channel and text fields as dynamic parameters so workflows can change them.

To find the channel ID, in Slack click the channel → View channel details → copy the “Channel ID”. Slack requires the ID, not the name.

Triggering from Workflows

You can now use “Plugins → Your Slack API Call” inside any workflow. For example, after a user submits a form, trigger the API call and pass the message text dynamically (like “New signup: Current User’s email”). Backend workflows work exactly the same and are ideal for automation.

Alternative: Incoming Webhook URL

Slack also offers a simpler method: enable Incoming Webhooks in your Slack app and Slack gives you a single POST URL. No token headers needed.

POST https://hooks.slack.com/services/AAA/BBB/CCC
Content-Type: application/json

{
  "text": "New Bubble event!"
}

This is simpler but less flexible (you can’t choose dynamic channels). For most beginner Bubble apps, the webhook method is the easiest way to get started.