{"slug":"agent402-tools-api-tx-simulate-00bcb3","title":"Dry-run a prospective smart-contract call or transaction without broadcasting it","host":"agent402.tools","method":"POST","resource":"https://agent402.tools/api/tx-simulate","category":"market","description":"Dry-run a prospective smart-contract call or transaction without broadcasting it: executes eth_call and eth_estimateGas against the latest block over the same keyless multi-endpoint public RPC pool as /api/evm-rpc (ethereum, base, polygon, arbitrum, optimism). Returns the return data and a gas estim","price_listed":0.005,"price_asked":0.005,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":920,"reported_calls_30d":6,"reported_payers_30d":1,"networks":["algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=","eip155:10","eip155:1329","eip155:137","eip155:143","eip155:42161","eip155:42220","eip155:43114","eip155:4663","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","stellar:pubnet"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"data":"0x70a08231000000000000000000000000abf4fabd7c416fb67202e5f9002389fc75e2a9d0","network":"base","to":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"data":{"description":"0x-prefixed calldata (default 0x - plain value transfer).","type":"string"},"from":{"description":"Optional sender address (default zero address).","type":"string"},"network":{"description":"ethereum / base / polygon / arbitrum / optimism (default base).","type":"string"},"to":{"description":"0x-prefixed 40-char target contract/account address.","type":"string"},"value":{"description":"Optional value in wei - decimal string or 0x hex (default 0).","type":"string"}},"required":["to"]},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"gasEstimate":{"type":"integer"},"network":{"type":"string"},"returnData":{"type":"string"},"revertReason":{},"success":{"type":"boolean"}},"required":["network","success","returnData","gasEstimate"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.005,"price_match":true,"latency_ms":920,"error":null}],"description_full":"Dry-run a prospective smart-contract call or transaction without broadcasting it: executes eth_call and eth_estimateGas against the latest block over the same keyless multi-endpoint public RPC pool as /api/evm-rpc (ethereum, base, polygon, arbitrum, optimism). Returns the return data and a gas estimate on success, or {success:false} with the revert reason when the call would fail. Strictly read-only - nothing is signed or broadcast.","last_updated":"2026-09-22T11:56:28.203Z","schemes":["exact","upto"]}