Where can I find an API for Mortgage Rates and Calculators?

[Charles Lecky]

Hello developers/technology enthusiasts,and mortgage lenders:

I am looking for a free API for mortgage rates, either updated weekly or daily.  Looking for:

-30 year fixed

-15 year fixed

-ARMs

-Commercial 

-SBA

-Refinance

Please share whatever you might find helpful.  Maybe they are from different sources? Can anyone confirm bankrate.com has one?

Thanks!