{"uid":"cap_HAp8zYYj0QRCXIj19kQb0","slug":"sift-web-tools-evm-contract-inspector-f8ae94a6","name":"Sift Web Tools – EVM Contract Inspector","description":"Contract check: proxy type, implementation, owner, verified source, capability flags. Inspects any EVM contract: detects EIP-1967 and EIP-1167 proxies and their implementation, reads the owner, checks Sourcify verification, and lists capabilities (mint, pause, blacklist, burn, upgrade) from the logic contract's bytecode.","url":"https://sift.srv1996466.hstgr.cloud/v1/crypto/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":"Chain (default base)"},"address":{"type":"string","description":"Contract address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"owner":null,"features":{"can_mint":true},"is_proxy":true,"proxy_kind":"EIP-1967 transparent/UUPS proxy","source_verified":true}},"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_wqHEOf1K9P2ZlyPx8AiRg","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 any EVM smart contract to detect proxy type (EIP-1967/EIP-1167), implementation address, owner, Sourcify verification status, and capability flags (mint, pause, blacklist, burn, upgrade).","exampleAgentPrompt":"Can you check this contract on Base — 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — and tell me if it's a proxy, who owns it, whether it's source-verified on Sourcify, and whether it has mint or upgrade capabilities?","exampleUseCases":[{"title":"DeFi contract safety audit","prompt":"Before I interact with this contract at 0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9 on Ethereum mainnet, can you tell me if it's a proxy, what the implementation is, who owns it, and whether it has any dangerous capabilities like blacklisting or pausing?"},{"title":"Proxy implementation discovery","prompt":"I'm auditing this contract — 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48 on base — can you detect whether it's an EIP-1967 or EIP-1167 proxy and resolve its actual implementation address?"},{"title":"Token contract capability check","prompt":"Can you scan this token contract 0x6B175474E89094C44Da98b954EedeAC495271d0F on base and tell me if it has mint, burn, pause, or upgrade functions I should be aware of, and whether the source code is verified?"}],"resultDescription":"Returns a JSON object containing: is_proxy (boolean), proxy_kind (e.g. 'EIP-1967 transparent/UUPS proxy'), implementation address if proxied, owner address (or null), source_verified (boolean from Sourcify), and features object with boolean flags for can_mint, can_pause, can_blacklist, can_burn, and can_upgrade.","failureModes":["Invalid or non-existent contract address returns an error or empty result","Unsupported chain identifier causes a bad request response","Contract with no detectable proxy pattern returns is_proxy: false with no implementation","Unverified contracts may have incomplete capability detection since bytecode analysis is approximate","Network timeouts or RPC failures on the target chain may return a 503 or error response","Non-contract address (EOA wallet) may return null or error for contract-specific fields"],"whenToPreferThis":"Choose this endpoint when you need a fast, comprehensive contract security snapshot — especially when you want proxy detection, owner lookup, and capability flags in a single call rather than querying multiple on-chain methods or block explorers. It is particularly useful for pre-interaction due diligence on DeFi protocols, token contracts, or any upgradeable contract pattern. Prefer it over raw RPC calls when you need Sourcify verification status bundled with bytecode capability analysis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:32:46.259Z","isFirstParty":false,"canonicalSlug":"sift-web-tools-evm-contract-inspector-f8ae94a6"}