Setup Guide

Step-by-step guides for each stamp method. Most methods take just a few minutes to set up.

Setting Up QR Scan

QR scan is the default method and works out of the box. Your staff scans the QR code from the customer's card on the Summa scan page in the browser.

  1. Log into your shop dashboard and go to Settings.
  2. Under "Input Method", select QR Scan (it’s active by default).
  3. Open the Summa scan page in the browser on the device behind the counter — this can be a tablet, phone, or laptop.
  4. When a customer pays, they show their card on their phone. Tap "Scan" and point the camera at the QR code.
  5. The stamp is added instantly. The customer sees the confirmation on their card.

You can enable "Auto-accrual" — this adds the stamp immediately after scanning, without an extra confirmation step.

Setting Up NFC Stamps

An NFC stamp is a small sticker on a physical stamp or keychain. Your staff holds it to the customer’s phone — the stamp is added automatically.

  1. Order an NTAG215 NFC sticker — available online from about €1 each. Other NFC tags (NTAG213, NTAG216) work too.
  2. Download an NFC writer app (e.g. "NFC Tools" for iOS/Android, free).
  3. In Summa, open the "Programs" page and click on your program. In the "Tap" tab you'll find the NFC URL — this is the URL that gets written to the NFC sticker.
  4. Open the NFC writer app, select "Write URL", and paste the Tap URL. Hold the NFC sticker to your phone — done, the sticker is programmed.
  5. Attach the sticker to a stamp, keychain, or small card. Your staff holds it to the customer’s phone at checkout.

Order 2-3 stickers — one for testing and a spare. The stickers are durable but will eventually wear out with heavy use.

Don’t place the NFC sticker freely on the counter — customers could stamp themselves. The stamp must stay in your staff’s hands.

Setting Up PIN Entry

PIN entry requires no accessories — no NFC sticker, no scanner, no extra device. The customer reads out their four-character code and your staff types it in.

  1. Log into your shop dashboard and go to Settings.
  2. Under "Input method", select Stamp code.
  3. That’s it — your shop is now configured for PIN entry.
  4. At checkout, the customer reads out their code (e.g. "K7PX"). The code is shown on their digital card.
  5. Your staff enters the code on the Summa scan page. The stamp is matched to the right card.

PIN entry is great for getting started — you can switch to QR scan or NFC anytime without customers losing their cards.

Setting Up Receipt Stamps

Receipt stamps are the only fully automated method — your POS system handles everything. This requires one-time technical setup (API integration), but after that it runs with zero staff effort.

  1. Create an API key: Go to Settings → API Keys, enter a label (e.g. "POS system"), and click Create.
  2. Copy the key immediately — it’s only shown once. Store it securely in your POS system’s configuration.
  3. Configure your POS system: after each completed sale, it should send an HTTP request to the Summa API. See the API Reference for details.
  4. The API returns a URL. Your POS system prints this URL as a QR code on the receipt.
  5. Test the integration: make a test sale and check that the QR code appears on the receipt. Scan it with your phone — you should land on the stamp page.
curl -X POST https://your-domain.com/api/receipt-stamp \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{}'

Test with curl first before building the POS integration — this way you can verify that the API key and network work.

The API key gives access to your shop — treat it like a password. Use a separate key for each integration, so you can revoke individual keys if needed.

API Reference →