curl "https://app.talkover.ai/api/v1/calendars/calendar-uuid-1/availability?from=2024-01-15T00:00:00Z&to=2024-01-22T00:00:00Z&duration_minutes=30" \
  -H "Authorization: Bearer talq_your_environment_token_here"

{
  "success": true,
  "data": [
    { "start_at": "2024-01-15T09:00:00Z", "end_at": "2024-01-15T09:30:00Z" },
    { "start_at": "2024-01-15T09:30:00Z", "end_at": "2024-01-15T10:00:00Z" },
    { "start_at": "2024-01-15T10:00:00Z", "end_at": "2024-01-15T10:30:00Z" }
  ]
}