Using the "Modify Booking" API to add Inventory Items to existing bookings.

The API endpoint has the message specifics, but if using our client area in the Test system, ws-client-test, use the 'Modify Booking' message to enter in the Booking ID and click the Modify button (Site ID: EXAMPLE Site ID; Booking: 150509).

This will take you to a new 'Modify booking' section/URL to view a client interface to the message.

At the bottom of the page, you will see the Inventory Items derived for the Site Details messages, where the web services delivers a list of Items that are set to sell 'online' and that are flagged as 'add on at checkin' and/or addon at checkout' to differentiate Items that are to be sold during the guest stay process.  

The developer should identify one or more of the appropriate Item(s) and specifiy a quantity (such as 1 Breakfast and 2 Fosters Bitter beers) and submitting the message, the quantity (at the price set for the Item) to be added to the primary Folio of the Booking.

If one were log into MyPMS and load the booking, they should see the item(s) post to the folio of the specific booking.