free apis for testing code example

Example 1: dummy api json

var xhr = new XMLHttpRequest();
xhr.open("GET", "https://reqres.in/api/products/3", true);
xhr.onload = function(){
    console.log(xhr.responseText);
};
xhr.send();

Example 2: dummy api

React Fakers is a collection of dummy data from the most popular dummy data
providers such as Json Place Holder, Faker, Pokemon, etc, 
for application development testing.

npm i react-fakers | yarn add react-fakers