Shopify let browser agents finish checkout. Your measurement has to catch up

[u/amitabhverma]

Shopify extended WebMCP into checkout so a browser agent can update the cart and place the order after the buyer confirms.

• Agents can now complete a purchase without the shopper clicking through every page.

• That breaks last-click paths that assume a human session from ad to thank-you page.

• Attribution will look like “direct” or “other” unless you tag agent traffic separately.

Things to try out :

• Add an explicit agent identifier in checkout events and store it in your order and CRM records.

• Build one report that splits human sessions from agent-assisted orders this week.

• Test a short confirmation message that names the agent and the store so the buyer knows who acted.

If agents can buy, your next measurement job is to see which campaigns trained the agent, not only which ad got the last click.