Editorial update and corrections
Added Cloudflare's August 4 wallet announcement as a watch item, with planned payment access distinguished from handle reservations. Revisited the Mastercard UK sandbox announcement and made its unconfirmed launch status explicit.
Removed the Similarweb UCP reference because the cited page returned 404 and its associated demand claim could no longer be verified. Added ACP/UCP acceptance tests, Shopify and WooCommerce evidence guidance, B2B catalog boundaries, and profile-specific readiness actions.
Replaced Visa's unavailable UK press-release URL with the same July 2 announcement in Visa UK's Mynewsdesk newsroom. The original publication date remains unchanged.
Corrected two SAP article dates to January 21 and January 22 using the dates displayed by SAP. Removed three undated documentation or product-page entries from the dated news feed; current Stripe and UCP documentation remains in the merchant guide references without an invented publication date.
The watchlist contains 19 entries, of which 18 point to first-party sources. This editorial date does not mean every historical entry was re-reviewed. See each entry's content review date in the source index.