No matter how you like to participate in developer communities, Pulumi wants to meet you there. If you want to meet other Pulumi users to share use-cases and best practices, contribute code or documentation, see us at an event, or just tell a story about something cool you did with Pulumi, you are part of our community.

Pulumi Community

That is possible if use the Pulumi Cloud. We have Webhooks support that allows you to trigger whatever you want. Here is a hook handler sending a Slack notification.
<https://github.com/pulumi/examples/tree/master/aws-ts-pulumi-webhooks>

From my understanding, the example pulumi stack creates an API gateway route that forwards incoming events to Slack, but how does Pulumi forward the event data to that API gateway endpoint?

If you go to `<https://app.pulumi.com/>&lt;your-organization&gt;/webhooks/new`, you should see a form like in the screenshot. The payload URL should be your custom endpoint receiving the webhook data. In the example case, this is the endpoint of the API gateway you deployed.