Free CUSIP Lookup API [closed]

Question

Anyone know of an API that will take a CUSIP and return a stock's symbol and vise versa?

Answer 1

Fidelity has a symbol lookup tool.

For example, CUSIP 037833100 returns the ticker and company name for Apple.

http://activequote.fidelity.com/mmnet/SymLookup.phtml?scCode=E&searchBy=C&searchFor=037833100

Answer 2

I've had luck with the following query from Vanguard.

Similar to another response, CUSIP 037833100 returns the ticker and company name for Apple, as well as delayed market info.

https://investor.vanguard.com/search/?query=037833100