My company pays a lot of figures for xignite and we cannot make this data publicly available without some restrictions (it would cost a lot more to do so).
My purely non-legal take is we can distribute price and metadata for instruments relative to a user's portfolio or a defined demo set of data or charts to yours, etc, but not freely distribute price data without an attribution behind it. I _suppose_ a user could add literally all 300k instruments we support to get the price data and that would violate our agreements (similar stuff has happened before, just watch it), but we'd just have to deal with the user via our TOS.
Good luck, unfortunately the next level of APIs for financial data and licensing fees can be annoying, from almost free to like 6 figures overnight. Some exchanges are much worse than others, like arbitrary pricing based on how large your company is…
My purely non-legal take is we can distribute price and metadata for instruments relative to a user's portfolio or a defined demo set of data or charts to yours, etc, but not freely distribute price data without an attribution behind it. I _suppose_ a user could add literally all 300k instruments we support to get the price data and that would violate our agreements (similar stuff has happened before, just watch it), but we'd just have to deal with the user via our TOS.
Good luck, unfortunately the next level of APIs for financial data and licensing fees can be annoying, from almost free to like 6 figures overnight. Some exchanges are much worse than others, like arbitrary pricing based on how large your company is…