{"uid":"cap_Q4bKYPhkE3aETfBoPAFiF","slug":"token-metadata-risk-inspector-base-eth-f8c3390e","name":"Token Metadata & Risk Inspector (Base/ETH)","description":"Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.","url":"https://kr-x402-mvp.kgy5612.workers.dev/v1/token-metadata?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"chain":{"enum":["base","eth"],"type":"string","description":"base (default) or eth mainnet"},"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","examples":["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"],"description":"Address to inspect"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"kind":"ERC20","next":["/crypto/token-risk?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","/crypto/allowance?owner=&spender="],"safe":null,"chain":"base","flags":["upgradeable_proxy","has_owner","admin_can_change_logic"],"owner":"0x...","proxy":{"type":"ZEPPELINOS_LEGACY","admin":"0x4fc7850364958d97b4d3f5a08f79db2493f8ca44","beacon":null,"is_proxy":true,"implementation":"0x2ce6311ddae708829bc0784c967b7d77d19fd779"},"token":{"name":"USD Coin","symbol":"USDC","decimals":6,"total_supply":4100000000},"address":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","summary":"ERC20 USDC behind ZEPPELINOS_LEGACY proxy, has owner","chain_id":8453,"checked_at":"2026-10-30T03:40:00Z","interfaces":{"erc165":false,"erc721":false,"erc1155":false},"is_contract":true,"native_balance":0,"code_size_bytes":1852,"owner_renounced":false}},"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_PGFf429Pf2g4znyYY6xJv","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":"Returns on-chain metadata for an ERC20 or contract address on Base or Ethereum, including token info, proxy type, ownership flags, and security risk signals.","exampleAgentPrompt":"Look up the token metadata for contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base — tell me the token name, symbol, whether it's a proxy, who owns it, and any security flags like upgradeability.","exampleUseCases":[{"title":"Vet unfamiliar token before trading","prompt":"Before I swap into this token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, can you check its metadata — is it a proxy contract, who owns it, and are there any admin risk flags I should know about?"},{"title":"Identify unknown contract address","prompt":"I just received tokens from contract 0x4200000000000000000000000000000000000006 on Base — what token is this, what are its decimals, and is it a standard ERC20 or something else?"},{"title":"Security audit of ETH mainnet token","prompt":"Can you pull the full on-chain metadata for the contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum mainnet and flag any upgradeability or ownership risks?"}],"resultDescription":"A JSON object containing the token kind (e.g. ERC20), token name, symbol, decimals, total supply, chain and chain ID, proxy details (type, admin, implementation address), owner address, security flags (e.g. upgradeable_proxy, has_owner, admin_can_change_logic), interface support (ERC165/721/1155), native balance, code size in bytes, whether owner is renounced, and suggested next endpoint calls.","failureModes":["Invalid address format (not a 0x + 40 hex chars) returns validation error","Address is an EOA (externally owned account), not a contract — is_contract may be false","Unsupported chain value returns error","Contract exists but has no token interface — token fields may be null","Network timeout or RPC unavailability causes 5xx","Payment failure via x402 if insufficient USDC balance on Base"],"whenToPreferThis":"Use this endpoint when an AI agent needs to classify, risk-score, or inspect a specific smart contract address before interacting with it — especially for ERC20 tokens on Base or Ethereum mainnet. Prefer this over generic block explorers when you need machine-readable, structured output about proxy architecture, ownership, and security flags without API keys, paying only per call via USDC on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:41:55.337Z","isFirstParty":false,"canonicalSlug":"token-metadata-risk-inspector-base-eth-f8c3390e"}