curl "https://app.talkover.ai/api/v1/calendars" \
  -H "Authorization: Bearer talq_your_environment_token_here"

{
  "success": true,
  "data": [
    {
      "id": "calendar-uuid-1",
      "name": "Sales Demo Calendar",
      "timezone": "America/New_York",
      "owner_id": "user-uuid-1",
      "created_at": "2024-01-01T10:00:00Z"
    }
  ]
}