IntegrateIntegration ModesHeadless CheckoutSDK ReferenceInterfacesPurseHeadlessCheckoutV1ParamsOn this pagePurseHeadlessCheckoutV1ParamsInterface representing a V1 session for the Headless Checkout. Properties apiKey apiKey: string; API key for authentication entityId entityId: string; Unique identifier for the merchant entity environment environment: "development" | "test" | "sandbox" | "production"; Target environment for the checkout (e.g., 'sandbox', 'production') paymentSession paymentSession: PaymentSessionModel; Payment session data containing transaction details