MAKO is a stack of paid x402 endpoints that buyer agents call directly with USDC on Base mainnet. POST /api/assurance/validate binds Verifier preflight, buyer policy, hashed payment evidence, delivery validation, and recourse into a signed assurance receipt. POST /api/route composes Pulse reliability, Pricing Index fairness, Reputation Score operator trust, and route selection into a single buyer-agent decision.
POST /api/assurance/validate — preflight + delivery + dispute-ready receiptLive on Base mainnet (eip155:8453). Settlement asset: USDC at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. Receipt signer: 0x12BBC7Cde00eB800588243A0B3B4E8E802673BFf. Pay-to: 0x6e4DfBe49858E9Cb93162352D75DBD1E409A7737. Facilitator: Coinbase CDP /platform/v2/x402.
AsterPay integration reference: MAKO implements a signed extensions.reliability contract, and AsterPay's public signer registry listed MAKO Pulse when checked on 2026-07-22. A sampled demo 402 did not expose that field, so this does not establish universal deployment, customer status, traffic, or revenue. Evidence boundary.