SoPay Payment API DocsMerchant Payment API · Integration Guides

Documentation for Payment Gateway API integrations—payin, payout, webhooks, and RSA2 signing across India, Thailand, Pakistan, China, and more markets.

Quick Start

Payment Gateway API

Signature Guide

What this site covers

SoPay Docs is a Payment API and Payment Gateway API reference for merchants—not a marketing site. You will find:

Merchant Collection API (Payin) — create orders and receive completion webhooks
Merchant Payout API — disburse to local beneficiaries
Signature verification — RSA2 for requests and callbacks
Merchant Callback API — idempotent webhook handling