📖 Payment API Integration Guide

This guide explains how to integrate the **Alipay Payment API**, including payment requests and callback handling.

📌 1. API Overview

This API allows merchants to accept payments through **Alipay**, process payment callbacks, and verify payment statuses.

Parameter	Type	Description
`email`	String	User email (used to link the order)
`amount`	Float	Payment amount (in US$)
`url`	String	Redirect URL after successful payment

Parameter	Type	Description
`email`	String	User email (used to link the order)
`amount`	Float	Payment amount (in US$)
`url`		Redirect URL after successful payment
`trade_no`	String	we give each tranctions an id and aftersales details
`custom_params`	String	payment password

GET https://p.zlib.store/pay?email=support@z-lib.fm&amount=1&url=https://z-library.sk

POST ?email=support@z-lib.fm&amount=1&url=https://z-library.sk&trade_no=20250309191532&password=waittoset

we charge at 20% for payments under 10$,10% for payments beyond 10$
we may change our rate if our cost changes, customers will have a week ahead to be notified.
We settle payments once a week, through USDT