# booking.reminder

Source: https://developer.nylas.com/docs/reference/notifications/scheduler/booking-reminder/

Sent at the scheduled reminder time before a booking.

**Recommended action:** Send a reminder notification to the host and/or guest about the upcoming booking.

## data.object fields

- `configuration_id` (string) **(required)** - The Scheduler configuration used to create this booking.
- `booking_id` (string) **(required)** - Unique identifier for the booking.
- `booking_info` (object) **(required)** - Details about the upcoming booking.
  - `event_id` (string) - The calendar event ID for this booking.
  - `start_time` (integer) - Unix timestamp for the event start.
  - `end_time` (integer) - Unix timestamp for the event end.
  - `time_until_event` (integer) - Seconds until the event starts.
  - `participants` (array, nullable) - List of booking participants. May be `null` when no participants are set.
    - `email` (string) - Participant email address.
    - `name` (string) - Participant display name.
  - `additional_fields` (object, nullable) - Custom fields collected from the guest during booking. May be `null` if no custom fields were provided.
  - `hide_cancellation_options` (boolean) - Whether cancellation options are hidden from the guest.
  - `hide_rescheduling_options` (boolean) - Whether rescheduling options are hidden from the guest.
  - `participant_rescheduling_url` (string) - URL the guest can use to reschedule the booking.
  - `participant_cancellation_url` (string) - URL the guest can use to cancel the booking.
  - `host_language` (string) - Locale code for the host's language.
  - `guest_language` (string) - Locale code for the guest's language.
  - `title` (string) - Title of the booked event.
  - `duration` (integer) - Event duration in minutes.
  - `location` (string) - Meeting location or conferencing link.
  - `organizer_timezone` (string) - IANA timezone of the organizer.
  - `guest_timezone` (string) - IANA timezone of the guest.
  - `organizer_email` (string) - Email address of the booking organizer.
  - `provider` (string) - Calendar provider for the booking (e.g. google, microsoft).
  - `is_group_event` (boolean) - Whether this is a group event with multiple attendees.
  - `organizer_calendar_id` (string) - Calendar ID where the event was created.
  - `notetaker_id` (string) - Notetaker bot ID if Notetaker is attached to this booking. Omitted when not applicable.
  - `event_description` (string) - Description of the calendar event.
  - `event_html_link` (string) - Link to the calendar event in the provider's web UI.
  - `ical_uid` (string) - iCalendar UID of the event.
  - `host_confirmation_url` (string) - URL for the host to confirm a pending booking. Only present for bookings that require host confirmation.

## Example payload

```json
{
  "specversion": "1.0",
  "type": "booking.reminder",
  "source": "/nylas/passthru",
  "id": "<WEBHOOK_ID>",
  "time": 1725895310,
  "webhook_delivery_attempt": 1,
  "data": {
    "application_id": "<NYLAS_APPLICATION_ID>",
    "grant_id": "<NYLAS_GRANT_ID>",
    "object": {
      "configuration_id": "<CONFIGURATION_ID>",
      "booking_id": "<BOOKING_ID>",
      "booking_info": {
        "event_id": "<EVENT_ID>",
        "start_time": 1719842400,
        "end_time": 1719846000,
        "time_until_event": 3600,
        "participants": [
          {
            "email": "john.doe@example.com",
            "name": "John Doe"
          },
          {
            "email": "jane.smith@example.com",
            "name": "Jane Smith"
          }
        ],
        "additional_fields": {
          "phone": "+1-415-555-0199",
          "company": "Acme Corp"
        },
        "hide_cancellation_options": false,
        "hide_rescheduling_options": false,
        "participant_rescheduling_url": "https://example.com/reschedule/cfg_8a3d2b-bk_2f6c9a1b7d",
        "participant_cancellation_url": "https://example.com/cancel/cfg_8a3d2b-bk_2f6c9a1b7d",
        "host_language": "en",
        "guest_language": "en",
        "title": "Project sync with John Doe",
        "duration": 60,
        "location": "https://meet.google.com/abc-defg-hij",
        "organizer_timezone": "America/New_York",
        "guest_timezone": "America/New_York",
        "organizer_email": "organizer@example.com",
        "provider": "google",
        "is_group_event": false,
        "organizer_calendar_id": "primary"
      }
    }
  }
}
```