# Self-Hosted Checkout Page The Self-Hosted Checkout Page in the sandbox is a simplified version of the production checkout experience. It is designed to demonstrate the essential capabilities of the Tietoevry E-commerce Gateway (EGW) across multiple payment processing types. This page is hosted by the Gateway and embedded or redirected from the merchant’s site during the checkout process. In sandbox mode, it includes limited functionality but still reflects the typical customer experience flow. ### Available Payment Methods The sandbox checkout supports three payment options, each simulating real transaction behavior: 1. [Click-to-Pay](/payment-method/digital-wallets/click-to-pay.md) (Mastercard only) - A secure, card-on-file payment experience based on network tokenization and cardholder recognition. 2. Card Payments (Mastercard demo only) - Traditional card entry with CVV and expiry date, using dummy credentials. 3. A2A via PSD2 Channel (demo bank) - Account-to-account payments through a PSD2-compliant simulated bank flow. {% hint style="success" %} These options cover the core processing types—card-based, token-based, and bank-based—allowing you to validate EGW’s capability in handling various transaction paths. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://doc.ecomm.api.tietoevry.com/e-commerce-payment-gateway/sandbox-guide/self-hosted-checkout-page.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.