Auth Settings: Navigate to “Auth” from the left-hand sidebar in your app dashboard.
Redirect URLs: Add the redirect URL where HubSpot will send users after authorization. Use the following format: https://your-host/api/oauth2/redirect/hubspot.
Scopes: Add the required OAuth scopes for your integration:
crm.objects.contacts.read
crm.objects.contacts.write
crm.objects.companies.read
crm.objects.companies.write
Save Changes: Click “Save” to save your OAuth settings.