TIER_C · monthly brief

MPP and Tempo force a multi-rail map

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

Why it matters

Watch whether agents actually present MPP credentials in the wild, with evidence.