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## Resource: Introduction

## Article: Introduction

## Article Link: https://dev.wix.com/docs/api-reference/business-solutions/bookings/bookings/attendance/introduction.md

## Article Content:

# About the Bookings Attendance API

With the Bookings Attendance API, you can retrieve and manage a booking
session's attendance information, including whether the session was attended
and how many participants attended.

- Set attendance for a booking session.
- Retrieve attendance information.

The number of `attendance` objects for a booking depends on the service type:
- Appointments have a single `attendance` object per booking.
- Classes and courses have an `attendance` object for each session related to the booking.

## Before you begin

It's important to note the following points before starting to code:

+ Validation capabilities in Set Attendance are limited. For example, ensure
  that you validate `numberOfAttendees` relative to both `attendance.status`
  and the booking's `numberOfParticipants` in your code.

## Use cases

- Set the attendance when a customer checks in for their booking.
- Determine which participants have missed the majority of a course's sessions.

## Terminology

For a comprehensive glossary of Bookings terms, see [Terminology](https://dev.wix.com/docs/rest/business-solutions/bookings/terminology.md).

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