why can't you go to a bank and get spot rates? banks offer connections for clients and stream quotes.
https://www.barx.com/
bofa
deutch
goldman
jpmorgan
or at least they did 10 years ago
what are you hoping to get from the partnership? credit lines, infrastructure, support? Do you have a crypto business, otc rfq, ...? Maybe you really just need an investor
you have customers already and the framework still has 30 days effort?
better option is to just provide a slick ui with blinking numbers and lights, buttons that do not work, and a random report with nice graphics.