Corrections log

7 November 2026 — primary-source review of stages, timeline and protocol map

Visa Intelligent Commerce stage (What’s live, homepage table, protocol map): was “live”, since “unverified”, judged “on the strength of Visa's reported US transactions and the June 2026 general availability of the Connect on-ramp”. Now: “pilot”, since 2025-12-18. Visa’s own releases describe pilots: hundreds of agent-initiated transactions with partners and US pilots in closed beta (18 December 2025), Connect announced in pilot (8 April 2026), and a “first live pilot” with BILL and Billtrust (20 October 2026). No Visa source found states general availability; the June 2026 Connect claim came from a newsletter and is not stated in Visa’s 10 June 2026 release. The undated protocol-map signal “Visa reports Intelligent Commerce live in the United States” was replaced by the dated 18 December 2025 signal. Sources: Visa, 18 Dec 2025, Visa, 8 Apr 2026, Visa, 10 Jun 2026, Visa, 20 Oct 2026.

Mastercard Agent Pay for Machines stage history (What’s live, timeline): was “pilot” from 2026-06-10 (“Launched with 30+ initial participants; end-to-end pilots with Cloudflare, Coinbase, Base, Ant International, BVNK and AIsa”), and the 10 June 2026 timeline event was staged “product”. Now: “announced” on 2026-06-10, because the launch release names participants but no completed pilots; “pilot” with date “unverified”, because the end-to-end pilots are first reported in Mastercard’s 20 October 2026 brief; early-access from 2026-10-20 unchanged. Sources: Mastercard, 10 Jun 2026, Mastercard, 20 Oct 2026.

Mastercard Agent Pay live date (What’s live, homepage table, protocol map): was “Full US availability for cardholders” in November 2025 (version “US general availability”), sourced to a secondary explainer. Now: “All US cardholders scheduled to be enabled by mid-November 2025” (version “US enablement”), sourced to Mastercard and to the CEO’s 30 October 2025 remarks. Stage live since 2025-11 (month precision) unchanged; no primary source confirming completion was found, and the record says so. Sources: Mastercard, 30 Sep 2025, Digital Commerce 360, 31 Oct 2025.

PayPal and Agent Pay (protocol map): was “PayPal joins the acceptance side, covering PayPal-accepting merchants.” Now: “Mastercard and PayPal announce that Agent Pay will be integrated into PayPal’s wallet and that PayPal will pilot the Mastercard Agent Pay Acceptance Framework.” Sources: Mastercard, 27 Oct 2025.

Mastercard Agent Pay Trust Framework (What’s live, homepage table, protocol map, Agent Pay for Machines article): was “white paper ‘Trust for agentic commerce’” with “five pillars (identity, intent, controls, trusted execution, intelligence)”. Now: a framework that “brings together identity, intent, controls, execution and intelligence”, as worded in Mastercard’s release. The white-paper title was not confirmed in a primary source. Sources: Mastercard, 30 Sep 2026.

AP2 v0.2 (timeline, 101, AP2 article): was “AP2 v0.2 released and donated to the FIDO Alliance; 60+ organisations involved”. Now: the 60+ organisations are attributed to AP2’s September 2025 announcement; Google’s April 2026 post gives no count. Google and FIDO sources added. Sources: Google, 28 Apr 2026, FIDO Alliance, 28 Apr 2026, Google Cloud, 16 Sep 2025.

Amex Agent Purchase Protection (liability): was “It protects eligible cardholders from charges tied to the error of a registered AI agent”. Now: “It is a commitment: Amex says it will protect eligible cardholders …”, with terms and conditions not published and the Agent Registration service described as in development. Sources: American Express, 14 Apr 2026.

UCP checkout (glossary, protocol map): was “UCP-powered checkout went live in US Search and the Gemini app on 15 October 2026”, region “United States (checkout live)”. Now: “Google’s Universal Cart, with checkout tied to UCP, began rolling out to US users in Search and the Gemini app on 15 October 2026”, region “United States (Universal Cart rolling out)”; coverage says Google links to retailers for checkout. Sources: TechCrunch, 15 Oct 2026.

Instant Checkout scale-back date (protocol map): was dated 2026-03-04. Now: 2026-03 (month precision): OpenAI’s statement was reported on 6 March 2026; the exact day was not confirmed. Sources: Digital Commerce 360, 6 Mar 2026.

MPP Visa card extension (protocol map): was dated “unverified”. Now: 2026-03-18: Visa contributed card-payment specifications at MPP’s launch. The Stripe and Lightspark extensions remain undated. Sources: Fortune, 18 Mar 2026.

Timeline additions: was 14 events. Now 21: added ACP and Instant Checkout (29 September 2025), Trusted Agent Protocol (14 October 2025), Visa pilot transactions (18 December 2025), UCP (11 January 2026), MPP (18 March 2026), Amex Agent Purchase Protection (14 April 2026) and the Universal Cart US rollout (15 October 2026), each from a primary release or dated coverage linked on the timeline. No earlier event was removed.

Homepage dates: was a Recent updates list out of order (26 Oct 2026 listed below 28 Apr 2026), next to a table “as of 27 October 2026”. Now: updates are listed newest first, and the table carries the dataset’s generated date. Both original dates were correct: the site launched on 26 October 2026 and was expanded with datasets on 27 October 2026.

27 October 2026 — 101 protocol attributions

MPP: was “Stripe’s protocol for machine payments.” Now: “Stripe and Tempo’s protocol for machine payments.” Sources attribute MPP jointly to Stripe and Tempo (Tempo is the payments-focused blockchain incubated by Stripe and Paradigm).

ACP: was “OpenAI’s protocol for agent commerce.” Now: “OpenAI and Stripe’s protocol for agent commerce.” Sources attribute ACP jointly to OpenAI and Stripe.