{"uid":"cap_CT-mxOIeux7Bys-Kia_fy","slug":"kair-os-trade-base-contract-inspector-edff28fd","name":"kair-os.trade Base Contract Inspector","description":"Inspect a Base address at a finalized block: bytecode fingerprint, EIP-1967 storage candidates, reported owner and ERC-165 interfaces. Returns raw evidence and unknowns; no security score or safety guarantee.","url":"https://kair-os.trade/base-contract/inspect?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Base mainnet address to inspect; no user RPC URL or explorer URL."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/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_2i-i7USSwc0AdrmRWDazQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Inspects a Base mainnet contract address to return bytecode fingerprint, EIP-1967 proxy storage slots, reported owner, and ERC-165 interfaces as raw on-chain evidence.","exampleAgentPrompt":"Can you inspect the Base contract at 0x4200000000000000000000000000000000000006 and tell me its bytecode fingerprint, whether it's an EIP-1967 proxy, who the reported owner is, and which ERC-165 interfaces it supports?","exampleUseCases":[{"title":"Proxy contract detection for DeFi integration","prompt":"I'm about to integrate with the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base — can you inspect it and tell me if it's an EIP-1967 proxy, what the implementation slot contains, and what interfaces it exposes?"},{"title":"Ownership verification before token approval","prompt":"Before I approve this token contract on Base at 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb, can you check who the reported owner is and give me its bytecode fingerprint and ERC-165 interfaces?"},{"title":"Unknown contract investigation","prompt":"I found this contract address 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on Base and have no idea what it is — can you inspect it and show me the raw on-chain evidence including bytecode hash, proxy storage slots, and supported interfaces?"}],"resultDescription":"Returns raw on-chain evidence including a bytecode fingerprint (hash/selector summary), EIP-1967 proxy storage slot candidates and their values, the reported owner address (if any), detected ERC-165 interface IDs, and any unknowns or unrecognized fields. Explicitly provides no security score or safety guarantee.","failureModes":["Address does not exist on Base mainnet — returns empty or null bytecode fields","Address is an EOA (not a contract) — bytecode fingerprint is empty, proxy/interface fields absent","Invalid address format — rejected by pattern validation before call","Network or RPC timeout — call fails with a service error","Block finalization delay — data reflects most recent finalized block, not latest pending state"],"whenToPreferThis":"Choose this endpoint when you need raw, structured on-chain facts about a Base mainnet contract — specifically bytecode identity, proxy architecture (EIP-1967), ownership, and interface support — without needing a trust score or security audit. Prefer it over block explorers when you need machine-readable JSON output suitable for agent pipelines. Best used as a reconnaissance step before interacting with an unknown contract.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:35:47.209Z","isFirstParty":false,"canonicalSlug":"kair-os-trade-base-contract-inspector-edff28fd"}