One of the most important aspects of being a Web Developer is to know how to work with APIs.
Whether building your own application as a front-end or back-end engineer, you are going to come across them. APIs are the core communication system behind the different software systems including the server, the database and the client-side of an application.
This is a companion discussion topic for the original entry at https://blog.crowdbotics.com/how-to-build-a-rest-api-with-nodejs-and-postgresql/