Hi, @lstepany👋 Private apps cannot be used with Webhooks. You'll need to create an app, set up OAuth, and then you can set your webhook details in your app settings. Here's some documentation:
Webhook documentation — “Webhooks are set up for a HubSpot app, not individual accounts. Any account that install your app by going through the OAuth flow will be subscribed to its webhook subscriptions.”
You'll need to create a public app (does not have to be listed in the Marketplace) and set up your webhooks in the app. It is not possible to use Private Apps for Webhooks.
Actually not even with a privet app but with API key and a manualy created SECRET. (isn't API key deprected already?? or is this a different thing?)
Initially I was plannig to build a custom integration with OAuth authentication method but after exploring more the operations hub I discovered that there is an option to send a webhook right from the HubSpot workfloes. Looks too easy 😄 is that a good solution?