How to send Slack notifications from Bubble

The simplest way to send Slack notifications from Bubble is to use the API Connector and call Slack’s Incoming Webhook URL. Slack gives you a special URL, and Bubble sends a POST request to it with your message. After that, you can trigger it from any workflow (page workflow or backend workflow).

Step‑by‑step setup in Bubble

First you create a Slack Incoming Webhook in Slack, then you add it to Bubble’s API Connector as a POST call, and finally you trigger that call inside a workflow with dynamic text.

• Create a Slack Incoming Webhook inside your Slack workspace (Slack ➜ Integrations ➜ Incoming Webhooks ➜ Add New). Slack gives you a URL that looks like https://hooks.slack.com/services/XXXXX/XXXXX/XXXXX.
• In Bubble, go to Plugins ➜ add API Connector ➜ click Add another API.
• Add a call with method POST, authentication set to None (Slack webhooks don’t use headers).
• Set the URL field to your Slack webhook URL.
• Set the body type to JSON and include a single field called text. This is what Slack will show in the channel.

{
  "text": "New user signed up!" // Replace with dynamic text in workflows
}

Check “Use as Action” so you can call it inside workflows. Initialize the call once (it will always return “ok”).

Triggering the Slack message from a workflow

Now you can send a Slack message anytime something happens. For example: when a user signs up, when a support ticket is created, or inside a backend workflow.

• In any workflow, click Plugins ➜ choose your Slack API call.
• Fill the text field with dynamic data like “New ticket from Current User’s name”.
• Run the workflow. Slack receives the message instantly.

This setup is reliable because Slack webhooks are simple, require no OAuth, and Bubble’s API Connector can send them without any headers or authentication.