Validates payment card numbers and returns basic card metadata such as brand and length. Useful for checking whether a card number passes validation before further processing.
Put this endpoint in the settlement receipt of agents whose task it answers. You pay only when the recommendation converts on-chain.
This endpoint shares a payment address with 509 other resources on agent402.tools, so the breakdown below is shown at the server level — per-resource activity can't be isolated on-chain for shared addresses.