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.

Sandbox on-ramp widget

You can test our on-ramp widget below:

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 token and testnet support

Our sandbox environment supports the following tokens and testnets:

Add 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.

Test Card for Declined Transactions

Test Card for Off-Ramp Payouts

Returning testnet tokens

After testing, please return testnet coins to us at the wallet addresses below.

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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.

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Empty testnet wallet

An empty testnet wallet will result in a Transaction processing failed error when you and other developers try to complete transactions. You may top up the wallet with your own testnet coins or use any available online faucet to top up Sepolia ETH.