{"slug":"simulate-cyberwarex-com-simulate-f42a37","title":"Simulate an EVM transaction before signing","host":"simulate.cyberwarex.com","method":"GET","resource":"https://simulate.cyberwarex.com/simulate","category":"other","description":"Simulate an EVM transaction before signing. Decodes the calldata into a named function with arguments and security risk flags, AND runs a keyless static eth_call preview to tell you whether the transaction would succeed or revert (with the decoded revert reason). Use it to catch a failing or malicio","price_listed":0.005,"price_asked":0.005,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":1270,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"chain":"base","data":"0xa9059cbb000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa960450000000000000000000000000000000000000000000000000000000005f5e100","from":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","to":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"additionalProperties":false,"properties":{"chain":{"default":"base","description":"EVM chain to simulate on.","enum":["base","ethereum","arbitrum","optimism","polygon","bsc"],"type":"string"},"data":{"description":"Transaction calldata (hex).","pattern":"^0x[a-fA-F0-9]*$","type":"string"},"from":{"description":"Sender address for the eth_call preview.","pattern":"^0x[a-fA-F0-9]{40}$","type":"string"},"to":{"description":"Target contract or account address.","pattern":"^0x[a-fA-F0-9]{40}$","type":"string"},"value":{"description":"Native value in wei (optional, decimal or 0x hex).","type":"string"}},"required":["to"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"asset_changes":{"description":"v2: needs a tracing RPC key.","type":"null"},"chain":{"type":"string"},"decoded":{"description":"function, signature, args.","type":"object"},"disclaimer":{"type":"string"},"note":{"type":"string"},"revert_reason":{"type":["string","null"]},"risk":{"description":"level (none|caution|danger) + flags.","type":"object"},"to":{"type":"string"},"would_succeed":{"type":["boolean","null"]}},"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-21","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.005,"price_match":true,"latency_ms":1270,"error":null}],"description_full":"Simulate an EVM transaction before signing. Decodes the calldata into a named function with arguments and security risk flags, AND runs a keyless static eth_call preview to tell you whether the transaction would succeed or revert (with the decoded revert reason). Use it to catch a failing or malicious transaction before you broadcast it. Read-only, no keys, no node infra. Asset-level change tracing is v2.","last_updated":"2026-10-21T06:05:25.846Z","schemes":["exact"]}