Setup (example with coinmarketcap's API)

routes.js

const BASE_URL = 'https://pro-api.coinmarketcap.com/v1';
const ROUTES = {
    get: [
        '/cryptocurrency/listings/latest',
        '/cryptocurrency/listings/historical',
    ],
    put: [],
    post: [],
    delete: [],
};
const HEADERS = {
    'X-CMC_PRO_API_KEY': '🖕🏽'
};

Usage

npm run start

Then navigate to localhost:7000/your-endpoint