Sharepoint - Query SP2013 Managed metadata term store

I've recently written a post on how to access Term Store in SharePoint 2013 using the javascript "SP.Taxonomy.js"

Hope it helps you.

JSOM or REST API = no. BUT you can use JavaScript to call the Taxonomy Web Service to effectively accomplish client-side access. It's definitely more cumbersome than using the CSOM or REST API, though, but it works.

Try this out:

The taxonomy picker with suggestions uses this web service client-side.

UPDATE: See the other answers. Sorry for the misinformation re: JSOM; I was thinking SharePoint 2010.