Sandbox testing guide

MoonPay provides a dedicated sandbox environment designed for integration development and testing. Leveraging this sandbox helps you identify potential issues early, ensures compatibility, and minimizes risks during deployment.

Initialize the MoonPay Widget

Initialize the MoonPay widget using your test API key with our SDK or with a simple URL (https://buy-sandbox.moonpay.com/?apiKey=pk_test_INSERT_YOUR_API_KEY). Your API KEY can be found on the Developers Page in your MoonPay dashboard.

Create a Sandbox Test Account

Know Your Customer (KYC) information entered will not be verified and when asked for documents you can skip by clicking on the "Skip document submission" button. We recommend adding a US or UK address for sandbox accounts since these work best with our test credit cards.

Sandbox supports the following Testnet Tokens.

Bitcoin - Testnet3
Ethereum & ERC20 Tokens - Sepolia (ERC-20 token transfers will use our ERC-20 MoonPayToken
Solana - Testnet
Binance Coin - Testnet
TON - Testnet
Stellar - Testnet
Litecoin - Testnet

Adding a Payment Method

At the payment screen choose the debit/credit card option and enter one of the following test card numbers. Do not enter authentic payment card information, as this will result in a failed transaction.

Card Type	Card Number	Expiration	CVC code
MasterCard 3DS Challenge (USA)	5385 3083 6013 5181	12/2030	123
Visa 3DS Frictionless (UK)	4485 0403 7153 6584	12/2030	123
Visa 3DS Challenge (UK)	4242 4242 4242 4242	12/2030	123

Test Card for Declined Transactions

Card type	Card number	Expiration	CVC code
Visa Insufficient funds	4544 2491 6767 3670	12/2030	123

Test Card for Off-Ramp Payouts

Card type	Card number	Expiration	CVC code
Visa Direct payout	4000 0209 5159 5032	12/2030	123

Sandbox Failure Reasons

Transaction processing failed may happen when the testnet wallet is empty or you used the wrong card. Please reach out to your MoonPay representative.
Your Region is Not Supported means MoonPay may not support your country or the cryptocurrency is unsupported in your region. New York, USA is not supported in sandbox but is supported in production.
You've made too many actions or You can't perform this action means you have been rate limited. This happens when we detect unusual behavior and is not uncommon for partners to experience this while testing. The recommendation is to wait ~20 minutes before trying again.
Account is restricted or blocked may happen if you are using a production MoonPay user account in sandbox or entered otherwise triggered one of our automated flags for suspicious behavior.