Paying Correctly Is Not the Same as Buying the Right Product, Warns Shopping Agent Guide
A shopping agent can complete a valid payment yet still buy the wrong item, such as a larger variant or the wrong quantity, while treating a displayed price as the final total. The article argues that a reliable purchasing system needs buyer intent, exact product selection, an accepted quote and order, and a payment authorization limited to a specific policy. Search results count only as possible selections, and unknown facts like shipping charges should be resolved or flagged rather than assumed. It also recommends treating merchant listings as untrusted data that cannot override budgets or payment instructions. The piece uses the WebAZ x402 Direct Pay flow as an example of a non-custodial, server-defined payment requirement, noting that settlement verification does not confirm seller legitimacy or guarantee delivery.
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