Discover the pages of a site. Free 5 times a day per client address (at most 50 pages each) when the request carries no credential or key; then 0.05 USD per call. The page list is the response itself: nothing is recorded, so a lost response cannot be recovered and the charge stands.

What this call was charged. The amount is a decimal USD string ("0.10"); by contrast, the x-payment-info.amount advertised on each paid operation is USD cents as an integer string ("10"). A call settled from a prepaid balance carries rail "prepaid" and the remaining balance. A call paid with a Pro account’s key carries rail "subscription", the captured pages drawn from the included allowance (2 per live pair) and the pages left; its amount is what any leftover balance and overage paid, "0.00" when the allowance covered the call.