# Pre-requisites
source: https://developer.mastercard.com/mdes-digital-card-art-service/documentation/testing/pre-requisite/index.md

1. Refer to the MDES Digital Card Art Service [API specification](https://developer.mastercard.com/mdes-digital-card-art-service/documentation/api-reference/index.md).
2. Download the sandbox encryption certificate: [public-key-certificate.crt](https://static.developer.mastercard.com/content/mdes-digital-card-art-service/uploads/public-key-certificate.crt) (2KB).
3. Use the static publicKeyFingerprint value `710498B6F697B1ED8E5EB264E96D335763F7C02B` along with the encryption certificate.