import scrapy

class CardsSpider(scrapy.Spider):

    name = 'cards'
    #based_url='https://moneyfacts.co.uk/credit-cards/balance-transfer-credit-cards/?fbclid=IwAR05-Sa1hIcYTRx8DXYYQd0UfDRjWF-jD2-u51jiLP-WKlkxSddKjzUcnWA'

    def start_requests(self):
        yield scrapy.Request(
            url = 'https://moneyfacts.co.uk/umbraco/surface/CreditCardsFinder/GetTableItemsFor',
            callback = self.parse,
            method = "POST",
            headers = {
                'content-type': 'application/x-www-form-urlencoded',
                'x-requested-with': 'XMLHttpRequest'
                }
                 )
    def parse(self, response):
        cards = json.loads(response.body)