{"uid":"cap_bwTGTeP5KyBdNQIp1d5dD","slug":"xx402-base-chain-contract-inspector-3e08f7af","name":"xx402 Base Chain Contract Inspector","description":"Paid Base token, wallet, DeFi, chain-read, x402 buyer/seller discovery, and specialized Bitcoin 15-minute Up/Down prediction-market data packets for autonomous agents and risk tools.","url":"https://x402.xx402.icu/api/base-chain/contract?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"keys":["summary","decision","account","contract","proxy_slots","next_products","priority_queue","risk_breakdown","review_queue","avoid_queue","bucket_counts","source_status","sources"],"type":"json"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_qs_RGxq0i8qwLMnoc3Wed","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Inspects a Base/EVM address to determine if it is a contract, detect proxy patterns, and return risk/decision signals for autonomous agents.","exampleAgentPrompt":"Can you check whether the Base address 0xba76c7ECa175f67cFcE475c09498f840176bf497 is a contract, detect any proxy patterns, and give me a risk decision on whether it's safe to interact with?","exampleUseCases":[{"title":"DeFi protocol due diligence","prompt":"Before my agent sends funds to 0xba76c7ECa175f67cFcE475c09498f840176bf497 on Base, check if it's a legitimate deployed contract and flag any proxy upgrade risks or avoid signals."},{"title":"Automated contract risk screening","prompt":"Screen the Base contract at 0x1234567890abcdef1234567890abcdef12345678 — tell me whether it lands in the priority, review, or avoid bucket and summarize the risk breakdown."},{"title":"Proxy pattern detection for audit","prompt":"I need to know if the smart contract at 0xAbCdEf0123456789AbCdEf0123456789AbCdEf01 on Base uses a proxy pattern — show me the proxy slots and any upgrade hints so I can flag it for a manual audit."}],"resultDescription":"Returns a JSON object with keys including: summary (human-readable verdict), decision (safe/review/avoid signal), account and contract metadata, detected proxy_slots, next_products recommendations, priority_queue/review_queue/avoid_queue classification lists, risk_breakdown details, bucket_counts, source_status, and raw sources used for the assessment.","failureModes":["Invalid address format (non-0x or wrong length) — schema validation error","Address is an EOA with no contract code — returns summary indicating no contract deployed","RPC or chain-read failure — source_status may show degraded or partial data","Payment not processed (x402 flow incomplete) — 402 Payment Required response","Rate limiting or service unavailability — 5xx error"],"whenToPreferThis":"Choose this endpoint when you need to quickly determine whether a Base/EVM address has deployed contract code, detect proxy upgrade patterns, and receive a structured risk decision (priority/review/avoid) before interacting with or routing funds to that address. Prefer it over generic block explorers when you need machine-readable risk signals and queue classifications suitable for autonomous agent decision-making.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T22:28:06.349Z","isFirstParty":false,"canonicalSlug":"xx402-base-chain-contract-inspector-3e08f7af"}