Jennifer Simonson is a business journalist with a decade of experience covering entrepreneurship and small business. Drawing on her background as a founder of multiple startups, she writes for Forbes ...

Editor's Note: APYs listed in this article are up-to-date as of the time of publication. They may fluctuate (up or down) as the Fed rate changes. CNBC Select will update as changes are made public.

A REST API (short for Representational State Transfer Application Programming Interface) is a way two separate pieces of software can talk over the internet using standard rules. At its core, it lets ...