{"uid":"cap_I72duu9xA4PER4x-cAAjf","slug":"skills-onesource-io-4a1c9f57","name":"Ethereum eth_call Simulator (skills.onesource.io)","description":"Simulate a read-only Ethereum contract call via eth_call - no transaction sent","url":"https://skills.onesource.io/api/chain/call","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"to":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"},"data":{"type":"string","pattern":"^0x[a-fA-F0-9]+$"},"from":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"},"value":{"type":"string","pattern":"^0x[a-fA-F0-9]+$"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005000","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.005000/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_JSmEuqakEg3UQpA2M9PAt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Simulates a read-only Ethereum smart contract call via eth_call without sending a transaction to the chain","exampleAgentPrompt":"Simulate a read-only eth_call to Ethereum contract 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 with calldata 0x70a08231000000000000000000000000d8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — no transaction, just return the result bytes.","exampleUseCases":null,"resultDescription":"Returns ABI-encoded bytes representing the return value of the simulated contract call, as if the function were executed on-chain at the current block without broadcasting a transaction or consuming real gas.","failureModes":["Invalid contract address format returns 400 validation error","Malformed calldata hex string returns 400 validation error","Contract reverts during simulation — returns revert reason or empty data","Contract does not exist at the given address — returns 0x or error","RPC node unavailable or rate-limited — returns 5xx error","Insufficient USDC balance for x402 payment — payment gateway rejection"],"whenToPreferThis":"Use this endpoint when you need to read on-chain Ethereum contract state or simulate a function call without sending a real transaction. Ideal for querying view/pure functions, checking balances, resolving on-chain mappings, or validating calldata before broadcasting. Prefer over alternatives when you need a raw eth_call with full control over to, data, from, and value fields rather than a higher-level abstraction.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:34:29.809Z","isFirstParty":false}