hubspot custom app to post to webhooks

we need a custom app for hubspot that allows us to post to webhooks from workflows. We should be able to define the webhook and the parameters to post from the workflow builder.

https://developers.hubspot.com/docs/api/creating-an-app#:~:text=To%20get%20started%20creating%20your,and%20settings%20for%20your%20app.

https://developers.hubspot.com/docs/api/developer-guides-resources