{"uid":"cap_gUVz-exHQTQIyeitomNc7","slug":"aether-base-contract-onchain-data-lookup-8890db38","name":"Aether Base Contract Onchain Data Lookup","description":"Pay-per-call Base onchain data, token risk verdicts and x402 payability audits over x402 (USDC on Base).","url":"https://aether-x402.vercel.app/v1/base/contract?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"}}},"responseSchema":{"type":"json","example":{"proxy":{"implementation":"0x..."},"codeBytes":1234,"standards":["erc20"],"isContract":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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_SYf8-VvwTdEnlL4u6LHZ7","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":"Fetches onchain metadata and risk signals for a contract address on Base, including proxy details, code size, ERC standards, and x402 payability audit results.","exampleAgentPrompt":"Can you look up the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base and tell me whether it's a proxy, what ERC standards it implements, and whether it looks risky to interact with?","exampleUseCases":[{"title":"Token risk check before DeFi trade","prompt":"Before I swap into this token at 0x4200000000000000000000000000000000000006 on Base, can you check if it's a legitimate ERC20 contract and whether there are any risk flags I should know about?"},{"title":"Proxy contract implementation audit","prompt":"I need to know if the contract at 0x2Ae3F1Ec7F1F5012CFEab0185bfc7aa3cf0DEc22 on Base is a proxy — if so, what's the actual implementation address behind it?"},{"title":"x402 payability verification for agent integration","prompt":"Can you audit whether the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base is x402-payable, so I know if my agent can use it for micropayments?"}],"resultDescription":"A JSON object containing: proxy details (implementation address if applicable), codeBytes (size of contract bytecode), standards array (e.g. ['erc20']), and isContract boolean. May also include token risk verdict and x402 payability audit flags depending on the endpoint variant.","failureModes":["Invalid address format (not a valid 0x hex address) returns validation error","Address is an EOA (not a contract) — isContract returns false with no further data","Contract not deployed on Base network — returns empty or error response","Network or RPC issues causing timeouts","Payment failure via x402 if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need onchain ground-truth data about a specific Base network contract address — especially for token risk assessment, proxy detection, ERC standard identification, or verifying x402 payability. It is purpose-built for Base and pays per call via USDC over x402, making it suitable for agent-native workflows without API key management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:42:33.980Z","isFirstParty":false,"canonicalSlug":"aether-base-contract-onchain-data-lookup-8890db38"}