I need to retrieve a list of user alerts set on a particular site collection in SharePoint Online. This is possible through the web UI under Site Settings -> User Alerts, but requires that I choose one user at a time, rather than supplying a list of all alerts for all users.
I'm perfectly happy with programmatic solutions, but as this is SPO I can't use anything server side (only Client Object Model or Web Services, as I understand it). I have spent a ridiculous amount of time Googling this and come up short.
Thanks in advance for your time.