{"uid":"cap_au4lESFmKWxwPpvxE-neg","slug":"base-address-inspector-05e5c419","name":"Base Address Inspector","description":"Inspect any Base address: EOA vs contract vs EIP-7702 delegated, ETH balance, nonce, proxy implementation (EIP-1967/1167/zos), and ERC-20 name/symbol/decimals/supply.","url":"https://automaton-tx-explainer.vercel.app/v1/base/address?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Base address (EOA or contract)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"type":"contract","erc20":{"name":"USD Coin","symbol":"USDC","decimals":6},"proxy":{"standard":"EIP-1967","implementation":"0x..."},"summary":"contract (EIP-1967 proxy) · ERC-20 USDC · 0 ETH","ethBalance":"0"}},"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_tuk0M6ZfJZqEtlZ1Xfoh9","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 a Base mainnet address and returns its type, token standards, proxy details, ETH balance, and a human-readable summary.","exampleAgentPrompt":"What kind of address is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Base mainnet — is it a contract or a wallet, and if it's a contract, what token does it represent and is it a proxy?","exampleUseCases":[{"title":"Identify unknown contract before interacting","prompt":"Before I approve a transaction, can you inspect 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base and tell me if it's a known token contract, whether it's a proxy, and what the implementation address is?"},{"title":"Verify token contract metadata","prompt":"I want to confirm that the contract at 0x2Ae3F1Ec7F1F5012CFEab0185bfc7aa3cf0DEc22 on Base is the USDC ERC-20 token — can you check its name, symbol, and decimals?"},{"title":"Distinguish wallet from contract for airdrop list","prompt":"I have a list of Base addresses and need to know if 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 is a regular wallet or a smart contract before I send tokens to it."}],"resultDescription":"Returns a JSON object containing the address type (EOA or contract), optional ERC-20 metadata (name, symbol, decimals), optional proxy information (standard and implementation address), the ETH balance in wei, and a concise human-readable summary string combining all findings.","failureModes":["Invalid address format (not matching ^0x[0-9a-fA-F]{40}$) — request rejected before payment","Address not found or RPC node unavailable — upstream error","Payment failure via x402 — 402 response if USDC payment not completed","Rate limiting or Vercel cold-start latency causing timeout"],"whenToPreferThis":"Choose this endpoint when you need a quick, structured breakdown of any Base mainnet address — whether it's an EOA, a token contract, or a proxy — including balance and ERC-20 metadata, all in a single call. Prefer it over raw RPC calls when you want a pre-parsed, human-readable summary without writing custom ABI decoding logic.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T06:30:12.889Z","isFirstParty":false,"canonicalSlug":"base-address-inspector-05e5c419"}