By billing, I mean real-time usage and consumption statistics - the API for which can be used to generate custom reports, forecast expenditure, etc.
I see that AWS has the facility to generate custom reports pertaining to usage that they export as a CSV from this page.
Do they also provide an API for the same where the user can generate reports / play around with the billing/usage data?
What about Rackspace? I see that they introduced this tool called Cloudability which monitors usage from SEVERAL cloud providers. I wonder how they are able to extract such information from such a large number of providers? Can anyone explain that? Is API the only route?