index.js

const express = require ('express');
const request = require ('request-promise');

const app = express();
const PORT = process.env.PORT || 5000 ;

const apiKey = 'put your scraper api key from www.scraperapi.com';

const baseUrl =  `http://api.scraperapi.com?api_key=${apiKey}&autoparse=true`;

app.use(express.json());

app.get("/", (req , res) => {
   res.send("welcome to amazon scraper API");
});

//get product details
app.get('/products/:productId', async (req, res) =>{
    const { productId } = req.params;

    try {
        const response = await request(`${baseUrl}&url=https://www.amazon.com/dp/${productId}`)

        res.json(JSON.parse(response));
    } catch (error) {
        res.json(error);
    }
});

//get product reviews
app.get('/products/:productId/reviews', async (req, res) =>{
    const { productId } = req.params;

    try {
        const response = await request(`${baseUrl}&url=https://www.amazon.com/product-reviews/${productId}`)

        res.json(JSON.parse(response));
    } catch (error) {
        res.json(error);
    }
});

//get product offers
app.get('/products/:productId/offers', async (req, res) =>{
    const { productId } = req.params;

    try {
        const response = await request(`${baseUrl}&url=https://www.amazon.com/gp/offer-listning/${productId}`)

        res.json(JSON.parse(response));
    } catch (error) {
        res.json(error);
    }
});

//get search results
app.get('/search/:searchQuery', async (req, res) =>{
    const { searchQuery } = req.params;

    try {
        const response = await request(`${baseUrl}&url=https://www.amazon.com/s?k=${search}`)

        res.json(JSON.parse(response));
    } catch (error) {
        res.json(error);
    }
})


app.listen(PORT, () => console.log(`server running on port ${PORT}`));