I asked the Nango AI, it said: " this error appears to be a configuration issue on the Nango side, not a VAPI bug. The error "Missing Nango configuration for tool type: google.calendar.event.create" suggests you need to set up the Google Calendar integration in Nango first. To fix this: Go to Nango → Integrations → Configure New Integration → Google Calendar Set up your OAuth credentials (client ID, client secret, scopes) Create a test connection under Connections → Add Test Connection → Authorize Make sure the integration ID you're using in VAPI matches what you configured in Nango The Google Calendar integration requires proper OAuth setup in Google Cloud Console with the callback URL https://api.nango.dev/oauth/callback."