{"uid":"cap_ARJSVuMnOAjEROWTxKJm_","slug":"x402-agent-wallet-tools-transaction-simulation-summary-d825de2a","name":"x402 Agent Wallet Tools – Transaction Simulation Summary","description":"A buyer-side control console for signature risk, EIP-712 review, transaction decoding, ERC20 allowance risk, Permit/Permit2 approvals, transaction simulation summaries, spend guard policy, receipt gate enforcement, and private-key boundaries.","url":"https://x402-wallet.558686.xyz/v1/tools/transaction-simulation-summary","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"ok":true,"tool":"transaction-simulation-summary","input":{"simulation":{"status":"success","gasUsed":21000,"assetChanges":[{"asset":"USDC","delta":"-0.01"}]}},"route":"/v1/tools/transaction-simulation-summary","result":{"summary":{},"findings":[],"riskLevel":"riskLevel_example","broadcasted":true,"assetChanges":[]},"project":"x402-agent-wallet-tools","deterministic":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.012","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.012/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.012","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.012","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2Wi79Rxy6Ui0Q0nMqnfPQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.012","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Analyzes a blockchain transaction simulation result and returns a human-readable summary, risk level, asset change breakdown, and safety findings for an AI agent's review before broadcasting.","exampleAgentPrompt":"Before I approve this transaction, analyze the simulation result for me: it succeeded, used 21000 gas, and the only asset change is USDC going down by 0.01 — give me a plain-English summary of what it does, the risk level, and any safety findings.","exampleUseCases":[{"title":"Pre-broadcast DeFi swap risk check","prompt":"I'm about to send a swap transaction. The simulation shows status 'success', 42000 gas used, and asset changes of ETH -0.5 and USDC +900. Summarize what this transaction will do and tell me the risk level before I approve it."},{"title":"Detecting unexpected token drain","prompt":"Check this simulation result for me — status is 'success', gas is 85000, and it shows WBTC decreasing by 0.1 and some unknown token increasing by 5000. Is this safe? Flag anything suspicious in the asset changes."},{"title":"Agent auto-approval policy enforcement","prompt":"My spending policy says I should only auto-approve low-risk transactions. This simulation has status 'success', 21000 gas, and a USDC delta of -0.012. What's the risk level and summary so I can decide whether to broadcast it automatically?"}],"resultDescription":"Returns a JSON object with: a human-readable summary of the transaction's effect, a list of findings (potential risks or anomalies), a risk level string (e.g. low/medium/high), a boolean indicating whether the transaction was/should be broadcast, and a parsed array of asset changes showing each token and its net delta.","failureModes":["Missing required simulation fields (status, gasUsed, assetChanges) returns a validation error","Malformed asset change entries (missing 'asset' or 'delta') may produce incomplete findings","Unknown or exotic asset symbols may not be decoded and appear as raw addresses","Simulation status other than 'success' (e.g. 'revert') may limit the summary detail","Service unavailability returns a non-200 HTTP error with no result object"],"whenToPreferThis":"Choose this endpoint when an AI agent has received a raw transaction simulation result (e.g. from a node RPC or simulation service) and needs a structured safety assessment and plain-English summary before deciding whether to sign or broadcast. It is ideal for agent-controlled wallets enforcing spend guard policies, ERC20 allowance review, or any pre-broadcast risk gate. Prefer it over generic transaction decoders when you also need a risk level classification and findings list in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:36:06.006Z","isFirstParty":false}