There's a new version of the HubSpot API

We're also working on a new documentation website, you're invited to check it out and give us your feedback.

How do I find the app ID for a HubSpot app?

Your app ID can be found below the name of your app when viewing the Apps dashboard in your developer account.

app_id_list

The app ID is also displayed when viewing the auth settings for your app.

app_auth_id_settings