Two agents, one deal.

A buyer agent opens an AP2 IntentMandate, a seller agent counters with an A2A CartMandate + x402 payment-required, the merchant collapses to a UCP signed order, and the buyer settles with an AP2 PaymentMandate. Both agents reason via AIsa (gpt-4o-mini) — shipped in one Lovable build.

Built in 1 prompt · AIsa · UCP × A2A × AP2