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MERCHANT CORE · SIMPLE SETUP

Install it. Activate it. Set up your business.

The normal desktop path is designed for business owners—not server administrators. Advanced hosting and Docker instructions are separated below for IT-managed deployments.

Buy once$25,000 one-time

Perpetual use of the purchased Merchant Core release and entitlement scope.

Lease$1,497 setup + $297/month

Production use while the paid term remains active.

Desktop downloadsWindows · macOS · Linux

Same Merchant Core features on each supported desktop platform.

Most buyers should choose Desktop / local setup

You can run local POS, Owner/Admin Control Center, products, staff, and employee time clock without Docker or a public server. The desktop application creates its secure local runtime automatically.

Choose hosted/hybrid only when you need remote/shared access, multi-location access through one Internet-facing backend, or public emailed invoice payment links.

Ask Number Chest to set up hostingI need setup help

1. Download the version for your computer

After payment, your secure Number Chest purchase page shows Windows, macOS, and Linux downloads. Choose the computer you are installing now.

2. Install and open Merchant Core

Windows: run the .exe installer. macOS: open the DMG and drag Merchant Core to Applications. Linux: allow the AppImage to run as an application, then open it.

3. Paste your activation key

Merchant Core opens an activation screen the first time it starts. Copy the MC- activation key from your Number Chest purchase page, paste it, and choose Activate and continue.

4. Complete the business setup checklist

Enter your business name, legal company name, owner/admin contact, and sales-tax percentage. Then follow the on-screen checklist for products, payments/deposits, employees, and the time clock.

5. Send one test invoice and go live

Before the first real sale, run a controlled POS payment, verify the deposit destination, clock an employee in and out, send a test invoice, and open its secure payment link.

Payments and bank deposits — plain-language setup

Complete bank verification directly with your supported payment provider first. Merchant Core stores the provider account reference, account type, last four digits, and verification state. Do not enter a routing number, full bank-account number, card number, or CVV into Merchant Core configuration.

For a standard desktop deployment, Number Chest or your payment-provider onboarding team can supply the references you need. The Owner/Admin screen labels exactly where they go.

Advanced IT instructions — hosted/hybrid Merchant Core

These settings are for an administrator or managed-hosting operator. Normal desktop buyers do not need them.

Run the Merchant Core API on a persistent HTTPS Node.js runtime with production storage/database authority. The desktop wrapper points to that service through MERCHANTCORE_REMOTE_ORIGIN.

  • SYSTEM_HMAC_SECRET — unique production secret.
  • PAYOS_ADMIN_API_KEY — production admin/payment authority key.
  • PAYOS_WEBHOOK_SECRET — verifies inbound payment webhooks.
  • MERCHANTCORE_PUBLIC_BASE_URL — HTTPS public origin used in customer invoice-payment links.
  • MERCHANTCORE_INVOICE_EMAIL_WEBHOOK_URL — transactional-email handoff endpoint.
  • MERCHANTCORE_REMOTE_ORIGIN — hosted API origin used by the desktop wrapper.

Keep production credentials outside source control and rotate any secret that was exposed in plaintext.

Advanced IT instructions — self-hosted Docker image

Use Docker delivery only for a hosted/self-hosted Merchant Core backend. Download the image matching the server CPU: linux/amd64 or linux/arm64.

Verify the downloaded archive before loading it:

shasum -a 256 -c merchant-core-1.6.0-r14-linux-amd64.docker.tar.gz.sha256
gzip -t merchant-core-1.6.0-r14-linux-amd64.docker.tar.gz
gunzip -c merchant-core-1.6.0-r14-linux-amd64.docker.tar.gz | docker load

Then use the supplied release compose file and environment template. Confirm /ready before placing the API behind HTTPS.

Before accepting the first live customer payment

  • Your Merchant Core activation screen reports success.
  • Business name and receipt/invoice branding are correct.
  • Payment provider and deposit destination show verified.
  • A controlled POS payment completes successfully.
  • An employee can clock in and out with their PIN.
  • A test invoice can be sent and its secure payment link opens correctly.
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