{"uid":"cap_l9mXd-K9ksQMEyBD2589m","slug":"x402-defi-intel-transaction-simulator-599cc5ed","name":"x402-defi-intel Transaction Simulator","description":"Crypto-agent toolkit: cross-chain DeFi intelligence + execution helpers + retrieval for agents. 16 endpoints: funding, open interest, long/short, token-safety, yield, prices, gas, tx-simulate, approval-check, bridge-quote, governance-search, lending, liquidations, protocol-search, swap-quote, token-resolve. Pay-per-call via x402.","url":"https://cryptodefidataintel-production.up.railway.app/api/tx-simulate","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["chain","to"],"properties":{"to":{"type":"string"},"data":{"type":"string"},"from":{"type":"string"},"chain":{"type":"string"},"value":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{"chain":"base","gasCostEth":9e-7,"willRevert":false,"gasEstimate":46000,"revertReason":null},"signal":"will_succeed","insight":"Transaction would SUCCEED against current base state.","sources":["public-rpc"],"confidence":0.85}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_0BlMSzJ9BEAUFWfh7tUMT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Simulates an EVM transaction on a specified chain before execution to predict success, gas cost, and revert reason","exampleAgentPrompt":"Before I send this transaction, simulate it on Base for me — I'm calling contract 0x1234...abcd with calldata 0xa9059cbb...0001 from my wallet 0xabc...def with 0 ETH value — will it succeed or revert, and what will the gas cost be?","exampleUseCases":[{"title":"Dry-run token swap before executing","prompt":"Before I actually submit this swap, can you simulate it for me on Ethereum? I'm calling the Uniswap router at 0x68b3...e5f2 with my swap calldata from wallet 0xdef...789 — I want to know if it'll go through or revert, and roughly what the gas will cost me in ETH."},{"title":"Check if approval call will revert","prompt":"I'm about to send a token approval on Arbitrum to the AAVE lending pool at 0x794a...c31b from my wallet 0xabc...123 — can you dry-run it first and tell me whether it'll succeed, why it might revert, and how much gas I should expect?"},{"title":"Pre-flight check contract interaction","prompt":"I've got some calldata I want to send to a smart contract on Base — the target is 0x9f8f...4d2a, I'm sending from 0xfee...c0de with 0.05 ETH value — can you simulate it before I pull the trigger and give me the revert reason if it's going to fail?"}],"resultDescription":"Returns a signal ('will_succeed' or similar), a human-readable insight string, willRevert boolean, revertReason (if any), gasEstimate in gas units, gasCostEth in ETH, the chain name, confidence score, and data sources used (e.g. public-rpc).","failureModes":["Missing required 'chain' or 'to' parameter returns validation error","Unsupported chain name causes lookup failure","Malformed calldata may cause simulation to return revert with cryptic reason","Node RPC unavailability causes low confidence or error response","Very new or unverified contract addresses may produce unreliable results"],"whenToPreferThis":"Use this endpoint when an AI agent needs to pre-flight check an EVM transaction before actual on-chain submission — especially useful for DeFi operations like swaps, approvals, or contract calls where reverts are costly. Prefer over static analysis when you need real-time chain-state simulation with gas estimation and revert reason decoding.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:31:44.186Z","isFirstParty":false}