Purpose

PalmPay Integration Guide (HTTP + Serial)

This is the single canonical integration document for both HTTP and Serial access.

This guide describes two supported access methods to the PalmPay payment API:

• HTTP API
• Serial API

Both methods use the same business routes and JSON contracts. Only the transport layer is different.

The API is used to:

• detect available payment systems and supported operations
• start QR/Palm payment flow
• poll payment status
• perform cancel/refund/final confirm
• ⬇️ Download palm_pay_integrator-http-api-v1.md