{"uid":"cap_E1sQ9QaYawzGs4qygVLVc","slug":"contract-creator-lookup-369c96a8","name":"Contract Creator Lookup","description":"Deployer address and creation transaction for a contract address, from Etherscan's V2 API -- who deployed it and when, pairs naturally with /contract-source. A non-contract or unrecorded address returns found=false rather than an error. $0.01/call.","url":"https://www.x402financialdata.com/contract-creator/:address","method":"GET","headers":{},"bodySchema":{"type":"object","$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","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","description":"EVM contract address"}}},"queryParams":{"type":"object","required":[],"properties":{"chain":{"enum":["eth"],"type":"string","description":"Which chain to query. Only 'eth' is supported right now."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_lDV11QcVV2c_R-n4CRmNV","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the deployer address and creation transaction hash for a given Ethereum contract address using Etherscan's V2 API","exampleAgentPrompt":"Who deployed the Ethereum contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48? I want the deployer address and the transaction that created it.","exampleUseCases":[{"title":"Audit DeFi protocol origin","prompt":"Can you tell me who originally deployed the Uniswap V2 router contract at 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D on Ethereum? I need the deployer wallet and the creation transaction hash."},{"title":"Verify NFT contract ownership","prompt":"I'm looking at this NFT collection contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D — can you find out which wallet deployed it and what transaction created it?"},{"title":"Due diligence on unknown token","prompt":"Before I interact with this token contract at 0x6B175474E89094C44Da98b954EedeAC495271d0F, can you look up who deployed it on Ethereum and when the creation transaction happened?"}],"resultDescription":"Returns a JSON object containing a 'found' boolean, the deployer wallet address, and the creation transaction hash. If the address is not a contract or the creation record is not available in Etherscan's database, 'found' is false rather than returning an error.","failureModes":["Address is not a contract (EOA wallet) — returns found=false","Contract exists but creation record not indexed by Etherscan — returns found=false","Invalid Ethereum address format — likely 400 error","Chain parameter set to unsupported network (only 'eth' supported) — error response","Network timeout or Etherscan API unavailability — upstream error"],"whenToPreferThis":"Use this endpoint when you need to identify who deployed a specific Ethereum smart contract and obtain the exact creation transaction, especially as a complement to /contract-source for full contract provenance. Prefer this over general blockchain explorers when you need a programmatic, pay-per-call solution without managing API keys. Best suited for due diligence, audit workflows, or enriching contract metadata pipelines.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T06:52:37.117Z","isFirstParty":false}