The admin API enables you to create or amend people, resources or clients and view bookings.
To authenticate you will require an auth token. This can be obtained by a POST request with an administrator's email and password to the login endpoint.
curl "https://www.bookingbug.com/api/v1/login" -H App-Id:{app_id} -H App-Key:{app_key} -X POST -d "email=me@example.com&password=mypass"