SumUp Payment Test

Connection is saved once. Change the checkout amount anytime without touching your API key.

Sandbox tip: In SumUp sandbox, charging exactly 11.00 EUR always fails (use any other amount to test success).

SumUp connection

Saved on this server. Update only when you change API key or merchant code.

Merchant code

Used for every checkout. Stored in data/credentials.json.

SumUp API key

From SumUp → Settings → Developer → API keys. Must start with sup_sk_.

Checkout amount

Change before each test payment. Does not affect your saved API key.

Amount

Currency

Description (optional)

Go to payment page