Monthly archive
Event dates in this month are historical. zFinia publication dates remain the retrospective dates on each record.
TIER_C · monthly brief · Public record
Tempo mainnet and Stripe’s MPP made it indefensible to cover only Coinbase x402. Incumbent payments firms now had an HTTP 402 story that settles into existing merchant balances.
Event 28 March 2026 · source 7 September 2026 · zFinia published 7 September 2026 · retrospective
TIER_A · official announcement · Public record
On 18 March 2026 Tempo announced public mainnet RPC and introduced MPP, co-authored with Stripe. MPP lets an agent request a resource, receive a 402 challenge, authorize payment, and receive the resource. Tempo says Visa, Stripe and Lightspark have extended MPP across cards, platform methods and Lightning. Stripe’s own blog presents MPP as an open standard for agent payments, including settlement into existing Stripe balances.
Event 18 March 2026 · source 18 March 2026 · zFinia published 7 September 2026 · retrospective
TIER_A · official announcement · Public record
Stripe published MPP as an open standard co-authored with Tempo. Agents request an API, MCP server or HTTP resource; the service returns a payment request; the agent authorizes; Stripe businesses see the payment like any other PaymentIntent. Stripe also states payment support for both MPP and x402 inside a broader agentic commerce stack.
Event 18 March 2026 · source 18 March 2026 · zFinia published 7 September 2026 · retrospective
TIER_B · analysis seed · Public record
Across Visa Intelligent Commerce, x402 and MPP, the shared design is: the human sets a budget and allowed counterparties; the agent spends inside that envelope; settlement is a stable unit or a card token. The protocols disagree on rail, not on the control problem.
Event 18 March 2026 · source 18 March 2026 · zFinia published 7 September 2026 · retrospective
TIER_A · company move · Public record
Through 2025–2026, incumbent payments and model vendors published overlapping agent-commerce interfaces. Stripe describes an Agentic Commerce Protocol alongside MPP and x402 support. Visa shipped Intelligent Commerce. The overlapping vocabulary is a classification problem for buyers and a coverage obligation for zFinia.
Event 18 March 2026 · source 18 March 2026 · zFinia published 7 September 2026 · retrospective
TIER_A · official announcement · Public record
Tempo’s mainnet note lists Mastercard among partners working on mainnet payment use cases, and says MPP is extensible to card networks. This is partnership language, not a settlement-volume disclosure. zFinia files it as TIER_B/A official corporate communication depending on the primary source.
Event 18 March 2026 · source 18 March 2026 · zFinia published 7 September 2026 · retrospective