Payment system for worpdress without woocommerce?

Question

Electronic commerce

I am an individual and cannot find a payment system that can be easily integrated into a WordPress site without the WooCommerce plugin. Since I just need a form of payment, without a store. The user simply enters the amount himself, the order number and clicks pay. Without any baskets and so on.
Tell me please

Answer 1

I recommend Shopify https://apps.shopify.com/shopify-for-wordpress

Answer 2

Yandex money. The Internet has a script for http payment notifications.