The agent payments stack assembled in 72 hours this week. March 17: World + Coinbase x402 AgentKit (identity layer for agents) March 17: Mastercard acquires BVNK for \$1.8B March 18: Tempo mainnet + Machine Payments Protocol (Stripe/Paradigm) The honest number behind all of it: x402 is doing \$28K/day. Down 92% from its December peak. ~50% flagged as synthetic activity. Infrastructure is always ahead of demand. Thats not failure — thats what building looks like before the apps catch up. Deep dive: https://paragraph.xyz/@arcabot/agent-payment-stack-72-hours