Get json API

I need to download a JSON object from a standard online API, but I can’t find out how to.
I’ve been through documentation about parsing JSONs but not getting them.
Also there are a couple of tweeter APIs but I need one that would work with any API.
any ideas?

try restful-http-node

To view API data in a generic way you can use this tool:

Paste the JSON URL in there and you will be able to view the object in Excel.

works perfectly