1. how to create organizations through API, OR 2. how to use different tool integrations (google/ghl) with different assistants in the same organization

You can’t create organizations via the vapi API must use the dashboard, but you can manage multiple assistants within one organization, each with its own tool integrations. By connecting separate tools per assistant through the API or dashboard..

Thank you, can you answer a question about your GHL Calendar integration? When I use your Google Calendar integraiton the calendar works fine for checking availability, booking, etc. However when I use for my GHL clients, the calendar tool does not even know the current date, nor can it find the calendar. We use the Calendar ID, the tool id, etc. but still nothing. Please let me know a solution and also consider adding a GHL Calendar integration via API like you do for the Google Calendar. Dwayne

Use a {{now}} variable in prompts, double-check your calendarId and timezones, and share the call_id if the issue persists..