{"uid":"cap_Qc5dZW5CRXB228eMFhiAL","slug":"saylor-innovations-evm-contract-introspection-base-1276ca2b","name":"Saylor Innovations EVM Contract Introspection (Base)","description":"EVM Contract Introspection (base). Base contract introspection: contract vs wallet (incl. EIP-7702 delegation), bytecode size, proxy detection (EIP-1967 implementation/admin/beacon and legacy OpenZeppelin slots) and ERC-20 name, symbol, decimals and total supply.","url":"https://saylorinnovations.com/api/evm/base/contract/:address?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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_YUx6GSF2bNUZNOGlr49Iz","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches on-chain smart contract data for a given contract address on the Base EVM network","exampleAgentPrompt":"Can you pull up the on-chain contract details for the Base network address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want to know what kind of contract it is and see its metadata?","exampleUseCases":[{"title":"DeFi protocol contract audit","prompt":"Look up the smart contract at 0x4200000000000000000000000000000000000006 on Base and tell me what kind of contract it is, including any metadata or ABI info you can find."},{"title":"Verifying a token contract address","prompt":"I got a token contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base — can you introspect it and confirm it's a legitimate ERC-20 token contract?"},{"title":"Investigating unknown contract deployment","prompt":"There's been some activity on Base at address 0x3154Cf16ccdb4C6d922629664174b904d80F2C35 — fetch the on-chain contract data so I can figure out what's deployed there."}],"resultDescription":"Returns on-chain contract data for the specified Base network address, including contract bytecode, ABI, deployment metadata, and potentially contract type or interface details extracted from the chain.","failureModes":["Invalid or malformed contract address returns a 400 error","Address exists but is an EOA (not a contract) — may return empty bytecode or an error","Contract not deployed on Base network — returns 404 or empty result","Network congestion or RPC timeout causes delayed or failed response","Rate limiting if called excessively without payment credentials"],"whenToPreferThis":"Use this endpoint when you specifically need to introspect smart contracts deployed on the Base EVM network (Coinbase's L2). Prefer this over generic blockchain explorers when you want structured, programmatic contract data in an API response without scraping. It is particularly useful for agents that need to verify contract legitimacy, extract ABI, or check deployment details as part of an automated workflow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-03T00:48:43.887Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-evm-contract-introspection-base-1276ca2b"}