{"slug":"agent-pocket-network-v1-chain-simulation-67c2d1","title":"Pre-sign EVM transaction simulation","host":"agent.pocket.network","method":"POST","resource":"https://agent.pocket.network/v1/chain-simulation","category":"other","description":"Pre-sign EVM transaction simulation: an eth_call with state overrides previewing the revert reason and asset deltas before you sign. POST /v1/chain with the call {to, data, ...} and get the outcome as one JSON object. Deterministic per state instant. Pay per request in USDC; no account, no API key.","price_listed":0.005,"price_asked":0.005,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":957,"reported_calls_30d":5,"reported_payers_30d":2,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"data":"0x","to":"0xdAC17F958D2ee523a2206206994597C13D831ec7"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"description":"The call to simulate before signing.","properties":{"chain_id":{"description":"EVM chain id (default 1).","type":"integer"},"data":{"description":"Calldata, 0x-prefixed (0x for none).","type":"string"},"from":{"description":"Optional sender address.","type":"string"},"to":{"description":"Target contract address, 0x-prefixed.","type":"string"}},"required":["to"],"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"data":{"description":"For POST /v1/chain, a JSON object with the simulated outcome: success or revert reason, asset deltas, and the chain_id. The exact shape is the service's own and is not pinned here; errors return a JSON object with an `error` field, and the GET routes return their own small JSON documents.","type":"object"},"portal":{"properties":{"provenance":{"const":"third-party-supplier"},"schemaCheck":{"enum":["passed","undeclared","unchecked"]},"serviceId":{"const":"chain-simulation"}},"required":["provenance","serviceId","schemaCheck"],"type":"object"}},"required":["portal","data"],"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":957,"error":null}],"description_full":"Pre-sign EVM transaction simulation: an eth_call with state overrides previewing the revert reason and asset deltas before you sign. POST /v1/chain with the call {to, data, ...} and get the outcome as one JSON object. Deterministic per state instant. Pay per request in USDC; no account, no API key.","last_updated":"2026-09-24T09:32:10.226Z","schemes":["exact"]}