Universal Commerce Protocol (UCP)

A dated reading of what is claimed, reported, and independently verified in the current evidence.

Current reading

The readiness gap, in one scan

AI-assisted assembly · derived results

Evidence strength Critical

Decision

Human editorial judgment · 2026-06-28

Proceed with caution

Why: UCP is a Tier-3-backed open standard with very-high coalition support (a 10-member Tech Council now including Google, Shopify, Amazon, Meta, Microsoft, Salesforce, Stripe, Etsy, Target, Wayfair) and live checkout with marquee US retailers, directly intersecting our protocol layer. But the unresolved UCP/ACP/Amazon fragmentation and incomplete Lodging/Food specs mean committing engineering to a single stack now still risks rework.
Next: Track the ucp.dev Shopping spec (now v2026-04-08) and AP2 payment-handler interface against our UCP Credential Provider (Rule #29 protected); prototype a read-only catalog/checkout adapter behind a feature flag against the /.well-known/ucp discovery mechanism. Do NOT commit to UCP-vs-ACP exclusivity — design the adapter so both protocols can be served.

Constraints

No named blocker is present in the current public projection.

Evidence summary

AI-assisted assembly

Counts and dates only. Raw signals, private excerpts, trust records, and internal corpus material are not published here.

Publication record

Initial public reading

This is the initial public reading. No earlier readiness change is recorded.