{"uid":"cap_Fa4JJCRkHnixyWQ5Huu-r","slug":"base-contract-technical-profiler-b5501f9b","name":"Base Contract Technical Profiler","description":"Technical profile of a contract on Base: bytecode size, proxy detection (EIP-1167 / EIP-1967 implementation and admin) and owner(). This is NOT a security audit.","url":"https://auditor-x402.onrender.com/api/contract-profile?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string","description":"Address (0x...) to inspect"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1CB8YkpBe-1pc24A2leiT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns bytecode size, proxy type detection (EIP-1167/EIP-1967 implementation and admin slots), and owner() for a given contract address on Base mainnet.","exampleAgentPrompt":"Can you pull the technical profile for the contract at 0x4200000000000000000000000000000000000006 on Base — I want to know its bytecode size, whether it's a proxy, and who the owner is?","exampleUseCases":[{"title":"Identify proxy pattern before integration","prompt":"I'm about to integrate with the contract at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on Base — can you check if it's a transparent proxy, UUPS, or minimal clone, and tell me what the implementation address is?"},{"title":"Verify contract ownership for due diligence","prompt":"Who owns the contract at 0x2626664c2603336E57B271c5C0b26F421741e481 on Base? I need to confirm ownership before we proceed with an audit."},{"title":"Detect clone factory deployments","prompt":"Is the contract at 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD on Base an EIP-1167 minimal proxy clone? If so, what's the master implementation it points to?"}],"resultDescription":"Returns a structured technical profile including: bytecode size in bytes, whether the contract is an EIP-1167 minimal proxy (and its target), whether it is an EIP-1967 proxy (with implementation and admin slot values if present), and the result of calling owner() on the contract. This is structural metadata, not a security audit.","failureModes":["Invalid or non-existent contract address returns an error or empty profile","Address is an EOA (externally owned account) — bytecode size will be 0 and proxy fields absent","Contract does not implement owner() — that field will be null or omitted","Non-Base addresses (Ethereum mainnet, L2s) will not return valid data","Network congestion may cause slow or failed RPC reads","Payment failure (insufficient USDC or x402 misconfiguration) returns 402"],"whenToPreferThis":"Choose this endpoint when you need fast, low-cost structural inspection of a Base mainnet contract — specifically proxy pattern detection and ownership — without running a full security audit. Ideal for pre-integration due diligence, understanding upgrade patterns, or confirming ownership chains. Prefer this over manual RPC calls or block explorers when you need programmatic, structured output in an agent workflow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T12:35:59.971Z","isFirstParty":false,"canonicalSlug":"base-contract-technical-profiler-b5501f9b"}