One published number. $X / Ns.

Why one number

Pay-per-call billing goes wrong when the rule has exceptions nobody wrote down. "Billable unless it's a wrong number, unless the agent says it was short, unless the buyer disputes." Every exception becomes a ticket, and every ticket is margin you spend arguing.

SendAvata publishes the rule on the line itself: $X / Ns. Price and qualifying time. A call that reaches N seconds of bridged talk time is billed at $X and the charge is final. A call that doesn't reach N is free. Agents see this before they join the line, on every shift, and on every receipt.

What still gets disputed

Real defects: robocalls, wrong numbers, technical failures where the bridge dropped. Agents open a dispute from the call itself within 72 hours; you (or your rules) resolve it; credits post straight back to the wallet. Because the qualifying rule is unambiguous, disputes stay rare and specific.

Tiers and priority

Longer qualifying time means fewer billable calls at a higher price. Publish a ladder on a line — say 30s at one price, 60s at another — and let agents pick the rung they want. Prepaid tiers let an agent buy a block of calls up front at a lower per-call rate and jump the queue for that line.

The ledger

Every wallet movement — top-up, charge, credit, refund, tier purchase — is a row in your workspace ledger. The operator console reconciles it against settled calls continuously; if a terminal call hasn't settled, you see it on the overview before anyone asks.