# Access the Mastercard Checkout Solutions Onboarding Application
source: https://developer.mastercard.com/mastercard-checkout-solutions/tutorial/generate_test_dpas/step1/index.md

## Access the Mastercard Checkout Solutions Onboarding Application {#access-the-mastercard-checkout-solutions-onboarding-application}

1. Sign in to [Mastercard Connect](https://www.mastercardconnect.com)
2. Open the Sandbox version of the Mastercard Checkout Solutions onboarding application