A cross-protocol agent payment and authorisation ledger

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A cross-protocol agent payment and authorisation ledger — the differentiator is that one wallet observes all three emerging rails simultaneously rather than one. AP2 path: per-agent ECDSA keypairs provisioned at signup, a public key endpoint for verifier resolution, MCP signing tools for intent, cart and payment mandates, an inbound payment endpoint performing full mandate-chain verification, plus beneficiary resolution, audit trail, key revocation and idempotency records. x402 path: HTTP 402 pay-per-request micro-settlements in USDC on Base via Coinbase CDP with gas sponsorship and per-agent caps enforced at the wallet layer rather than the application layer. ACP path: Shared Payment Token issuance in production with merchant-and-cart-scoped one-time card tokens and a VGS forward-proxy handling real card data for PCI purposes, with Stripe as the PSP intermediary. Around this sit agent-linked virtual cards with per-agent daily limits, an accountable ownership model organising agents under principals with ledger and payment activity review, and per-agent communication resources