{"uid":"cap_zru5MVaxFdyJHdgjzu-61","slug":"rooms-by-aurmada-on-chain-address-lookup-590c88a3","name":"Rooms by Aurmada — On-Chain Address Lookup","description":"Rooms is one shared space for you, your people, and everyone's AI.","url":"https://rooms.aurmada.com/x402/v1/onchain/address?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"chain":{"enum":["base","ethereum"],"type":"string","description":"Chain (default base)."},"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"0x address."}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"usdc":{"raw":"2500000","balance":"2.5","contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","decimals":6},"block":"52400000","chain":"base","nonce":12,"native":{"wei":"1500000000000000000","symbol":"ETH","balance":"1.5"},"address":"0x3304E22DDaa22bCdC5fCa2269b418046aE7b566A","chain_id":8453,"is_contract":false,"code_size_bytes":0,"eip7702_delegated_to":null}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_30DPG_lqZCSsDaoOdWmW1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches native ETH balance, USDC balance, contract status (including EIP-7702 delegation), code size, and nonce for any address on Base or Ethereum at the latest block.","exampleAgentPrompt":"What's the ETH and USDC balance for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum, and is it a smart contract or a regular wallet?","exampleUseCases":[{"title":"Pre-transfer wallet sanity check","prompt":"Before I send funds, can you check if 0xAbCd1234AbCd1234AbCd1234AbCd1234AbCd1234 on Base is a smart contract or a plain wallet, and what its current ETH and USDC balances are?"},{"title":"Detect EIP-7702 account delegation","prompt":"Is 0x71C7656EC7ab88b098defB751B7401B5f6d8976F on Ethereum a regular EOA, a contract, or has it been delegated via EIP-7702? Show me its code size and nonce too."},{"title":"Portfolio balance snapshot","prompt":"Pull the live ETH and USDC balances for 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD on Base so I can see its current on-chain holdings."}],"resultDescription":"Returns the native ETH balance, USDC balance, a boolean indicating whether the address is a contract, whether it is an EIP-7702 delegated account, the bytecode size in bytes, and the current transaction nonce — all read live from public RPC nodes at the latest block on either Base or Ethereum.","failureModes":["Invalid address format (not a valid 0x hex address) returns a 400 error","Unsupported chain value returns an error — only 'base' and 'ethereum' are accepted","RPC node downtime or latency may cause timeouts or stale reads","Payment failure via x402 protocol results in a 402 response and no data returned","Address with no on-chain history may return zero balances and zero nonce"],"whenToPreferThis":"Choose this endpoint when you need a quick, all-in-one snapshot of an address's on-chain state — balances, contract status, EIP-7702 delegation, code size, and nonce — in a single call on Base or Ethereum. It is ideal for pre-flight checks before sending transactions, auditing wallet states, or detecting smart contract accounts without needing to set up your own RPC infrastructure.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T12:37:51.120Z","isFirstParty":false,"canonicalSlug":"rooms-by-aurmada-on-chain-address-lookup-590c88a3"}