A lot of lenders will offer a soft rate check, which means that checking your interest rate will not affect your credit score.  In order to do that, you will need to click to the lender page and click "apply now".  You will fill out some basic information on your financial profile.  The lender will have disclaimers that say "this will not affect your credit score".  Make sure you see this throughout the application.  You will get to the point where the lender will either offer you rates or they will give you a message on why they can't offer you a loan.  You can stop there and decide if you want to move forward with their process.