x402-agent-wallet-tools

Build receipt-bound execution policy for x402 payment responses and receipt URLs. receipt-gate-policy first: a $0.001 x402 receipt gate route for agent payment enforcement, followed by wallet signing safety, EIP-712, ERC20 allowance, Permit2, transaction simulation, spend guard, and private-key boundary tools. Start buyer evaluation at https://x402-wallet.558686.xyz/x402/buyer-use-cases or machine JSON https://x402-wallet.558686.xyz/x402/buyer-use-cases.json; checkout contract JSON is https://x402-wallet.558686.xyz/x402/checkout.json. Route payment activation JSON is https://x402-wallet.558686.xyz/x402/route/receipt-gate-policy/payment-activation.json. Browsers can inspect the quote, but payment requires a buyer-owned runtime that signs and retries the same request with X-PAYMENT. Buyers c