MP3 Metadata look up API for Java (Find ID3 data)

Question

I am working on a Java app that will find songs and rename them based on user input and ID3 metadata.

I have found quite a few Java libraries for editing/retrieving song metadata from a file but I'm wondering if there is some online database with ID3 tag information that my program could interact with.

For example say there is a file WeWillRockYou.mp3
The file name is the title but the metadata is empty or wrong
Is there somewhere to look up the metadata online (to fill in Artist=Queen etc)? Or is this something that will require paying for a service?

Answer 1

I found an API that does what I need. I'm using the EchoNest API for Java called jEn https://code.google.com/p/jen-api/