Use this API to cancel an existing Hosted Payment Page (HPP) payment link. Once cancelled, the HPP URL can no longer be used to complete a payment. **Before You Begin** To cancel an HPP transaction, you will need: - The `token` value from the HPP URL you want to cancel **Step 1: Get the Transaction Token** Locate the HPP URL generated when the payment link was created. Example HPP URL: `https://payment.ipospays.tech/payment?t=abc123xyz456` Copy the value that appears after `?t=`. In this example, that value is `abc123xyz456` — this identifies the HPP transaction that you want to cancel. **Step 2: Send the Cancel Request to the Cancel API** Pass that token as the `Authorization` header value. Cancelling a payment link is only possible while it is still pending (i.e. not yet paid and not already cancelled) — no request body is required.