x402 Agent Wallet Tools: Transaction Simulation Summary

Overview

Summarize transaction simulation outputs without broadcasting: status, gas, balance deltas, approvals, warnings, and sign-or-stop decision. receipt-gate-policy first: a $0.009 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. Browsers can inspect the quote, but payment requires a buyer-owned runtime that signs and retries the same request with X-PAYMENT. Buyers can download the route-specific first-payment client at https://x402-wallet.558686.xyz/x402/route/transaction-simulation-summary/first-payment-client.mjs, run node first-payment-client.mjs for quote-only checks, then opt into a buyer-owned x402 payment with PAY_REAL_X402=1. Copy-ready first paid request: curl -fsSL https://x402-wallet.558686.xyz/x402/route/transaction-simulation-summary/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm @x402/svm viem @solana/kit @scure/base && PAY_REAL_X402=1 EVM_PRIVATE_KEY=0x... node first-payment-client.mjs. Generic clients can also discover it from the live 402 response headers: X-First-Payment-Client, X-Download-Install-Then-Pay-Command, and Link rel=payment-client.

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