{"uid":"cap_o135M3sKhfz5iOF2xGhGA","slug":"contract-inspector-4c565aae","name":"Contract Inspector","description":"What is at an EVM address: wallet (with EIP-7702 delegate) or contract, bytecode size, token standard (ERC-20/721/1155), name, symbol, decimals, supply, owner() and proxy implementation. Use before interacting with an unknown address.","url":"https://bess-x402.onrender.com/v1/evm/contract?utm_source=zero.xyz","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"},"queryParams":{"type":"object","required":["address"],"properties":{"chain":{"type":"string","description":"ethereum, base, arbitrum, optimism or polygon"},"address":{"type":"string","description":"0x address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"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_QBmAmDGgRM67amhzN2i_B","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":"Inspects an EVM address to determine if it's a wallet or contract, its bytecode size, token standard (ERC-20/721/1155), name, symbol, decimals, supply, owner, and proxy implementation.","exampleAgentPrompt":"Before I interact with this address, can you inspect 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 on Ethereum and tell me if it's a wallet or contract, what token standard it uses, its name, symbol, decimals, and total supply?","exampleUseCases":[{"title":"Vetting unknown token contract","prompt":"Someone just sent me a token from address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum — can you check what it is, whether it's a real ERC-20, and what its name, symbol, and supply are?"},{"title":"Checking proxy contract implementation","prompt":"I need to know if the contract at 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D on Ethereum is a proxy, and if so what implementation it points to — also tell me if there's an owner set."},{"title":"Identifying NFT contract standard","prompt":"Is the contract at 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum an ERC-721 or ERC-1155? What's its name and symbol?"}],"resultDescription":"Returns a structured JSON object containing: address type (EOA wallet or contract), whether it has an EIP-7702 delegate, bytecode size in bytes, detected token standard (ERC-20, ERC-721, ERC-1155, or none), token name, symbol, decimals, total supply, owner() address if available, and proxy implementation address if the contract is a proxy.","failureModes":["Invalid or malformed 0x address returns an error","Unsupported chain name returns a validation error","Non-existent or zero-bytecode address may return minimal info with no token details","Contracts that don't implement standard interfaces may return null for name/symbol/supply","Network timeouts or RPC failures may cause 5xx errors","Unverified or non-standard proxy patterns may not have implementation detected"],"whenToPreferThis":"Use this endpoint when you need a comprehensive one-shot inspection of an unknown EVM address before interacting with it — it combines address type detection, token standard identification, and proxy resolution in a single call. Prefer it over chain-specific block explorers when you need programmatic access, or over raw RPC calls when you want pre-parsed token metadata without writing ABI decoding logic. Best suited for pre-interaction due-diligence flows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T00:33:40.735Z","isFirstParty":false,"canonicalSlug":"contract-inspector-4c565aae"}