How to make a request to a page in NodeJS?

I would like to know how to make a request to a page using NodeJS. Basically, I need to make a request to a webservice that supplies data from posts based on the informed zip and from the given response (which comes in json format), handle the data and perform some operations. I am a beginner on node and do not know how to do this. I'm using the express 4.x framework in the project. Thank you in advance for your cooperation!