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How-to guides
Pick the guide that matches what you are building. Each one walks the steps in order, marks what is required and what is optional, and links to the API reference for the detail.
A POS for many merchants (ISV)
How do I integrate my POS, used by many merchants, with card readers?
For: A software company (ISV) whose POS runs at many merchants, each with one or more card readers running the Merchant360 Payment App.
Key: One platform key (m360_isv_…) on your server. · 14 steps
A POS with no server (station keys)
How do I integrate when my POS calls Merchant360 straight from the store?
For: An ISV whose POS runs on the store PC with no server of its own in between.
Key: One station key (m360_stn_…) per register. · 9 steps
One merchant's own POS or software
How do I connect my own POS or back office to my card reader?
For: A merchant, or a developer working for one merchant.
Key: The merchant's own key (m360_live_…). · 10 steps
Your own app on the reader
How do I build my own payment app on a PAX reader (A920 MAX, A35) with Merchant360?
For: An Android developer building the merchant's app on the reader itself: its own screens for the order, the cart, sale, refund and void, with Merchant360 taking the card (for example a standalone app on an A920 MAX).
Key: No API key in your app. Your app is allowed on each reader by its package name and signing certificate; the reader's own Merchant360 login does the rest. · 14 steps
Online payments
How do I take card payments on my website or app?
For: A website, web app or mobile app taking cards with no reader.
Key: The merchant's key (m360_live_…), or a platform key with M360-On-Behalf-Of. · 5 steps