How to Install CorePOS on a Standalone Pax POS Device (A920Pro, A77, and similar)

Software & Hardware Covered

CorePOS can run on a Pax device in two ways:

Standalone — The Pax device handles the full POS functions (sales, inventory, barcode scanning, dual pricing, etc.) and payment acceptance (plus receipt printing on models that have a printer).
Payment terminal attachment — The Pax is connected to another POS (for example, a Sunmi) and primarily handles card payments.
Note: This guide covers the standalone use case only! If your Pax device is attached to a Sunmi POS (or another system) rather than used standalone, follow the separate attachment/integration instructions instead of the steps above.

Open the App Market (also called Pax Store) on the device.
- If the App Market opens normally, your device is provisioned and ready.
- If you cannot open the App Market or you get an error, the device is not yet provisioned. Contact CSI Works support at 619-246-8236 (or email info@csiworks.net) for provisioning help.

On your Pax device, open the App Market.
Search for CorePOS (you can also search for “CSI Works”).
You will usually see two versions:
- CorePOS (production) — install this one
- CorePOS Sandbox — do not install the sandbox version for live use
Tap Install on the production CorePOS app and wait for the download and installation to finish.
Once installed, open the CorePOS app.

After the app is installed, you need login credentials:

Merchants: After opening the app you can sign up for merchant account which will start 30 day trial and then you'll have an option and guidance to upgrade to paid subscription.
Agents / ISOs: After opening the app you can use the Demo Sign Up option to create a free demo account for demonstrations.

Once you have your username and password, log in on the device. This completes the basic setup.

Pax A920Pro — Full standalone POS: barcode scanning (front and rear cameras), receipt printing, and card payments.
Pax A77 — Full standalone POS for software and payments + barcode scanning, but no built-in receipt printer. Use an external printer if you need paper receipts.

Both devices support the same CorePOS software features (dual pricing, inventory, taxes, tips, offline mode, App Market add-ons, etc.).

You can now process sales, accept payments, scan barcodes, and (on the A920Pro) print receipts.
Additional features and apps (Inventory++, Variable Price Barcode Parser, Age Verification, Mix & Match, etc.) can be installed later from the same App Market or from within CorePOS.
Payment processing is processor-agnostic. Depending on your setup you may also need a BroadPOS (or Magensa) payment app pushed to the device — contact CSI Works or your processor if payments are not yet active.