WebMCP checkout: guardrails before an agent pays
Shopify extended WebMCP support into checkout, so a browser-based agent can move from finding a product to paying for it with no human click. This episode asks what replaces that click. The position: the accuracy debate is a distraction. A confident wrong number, quantity, currency or a hallucinated shipping address, is the real exposure, and 95% accuracy across four hundred daily tasks still means twenty wrong transactions.
You walk away with three controls: server-side spending ceilings enforced at the payment layer, idempotency keys so retries cannot double an order, and confirmation gates…
The skinny
The skinny isn't ready yet — notes appear once the transcript is processed.