post https://testsecure.peachpayments.com/checkout/initiate
Provide a redirect URL to the caller to redirect the user into the Checkout experience. The POST request contains the entityId, signature, purchase parameters, and any custom parameters that a merchant optionally sends. This allows the checkout instance to be created from a backend without requiring a "form post", or other similar method, from the frontend.
For more information, see the documentation.