Create a Montonio sandbox account

Get free Montonio test keys and connect them to your store so you can try BLIK and card payments without real money.

A sandbox is a pretend version of Montonio. You can run test payments and no real money moves. You get sandbox keys as soon as you register – no contract needed.

1. Create the account

  1. Open the Montonio Partner System and register.
  2. Confirm your email and log in.

2. Copy your two keys

  1. In the Partner System open Home from the left-hand menu. If you have more than one store, pick the right one.
  2. Click Get API Keys.
  3. Under Sandbox API keys copy the Access key and the Secret key.

If your business is already active and you added a new store, go to Business settings → Stores, click the store name, then Go to API Keys, and copy the keys under Sandbox API keys.

3. Paste the keys into your store

  1. In your store admin open Add-ons → Montonio.
  2. Open the Test (sandbox) tab.
  3. Paste the Access key and the Secret key.
  4. Click Connect.
  5. Under At checkout turn on Show Montonio at checkout, plus the payment methods you want – Show embedded BLIK for PLN carts and Show embedded card fields for PLN and EUR carts.

Done. While your store is in test mode, checkout uses the Montonio sandbox.

Good to know

  • Your store checks the keys when you connect. If you pasted production keys into the test tab (or the other way round), it tells you and offers to save them in the right place.
  • You do not need to set a notification address in Montonio. Your store sends it with every payment.
  • BLIK works only for carts in PLN. Card payments work for PLN and EUR. Carts in other currencies fall back to your other payment methods.
  • Refunds are issued in Montonio, not in YNS – see Issue refunds and handle returns.
  • Before you start selling for real, open the Production tab, connect your live keys (in the Partner System they are under Live API Keys) and switch your store to live mode.