{"uid":"cap_W34P_Q7BJlodGyxfO2t5N","slug":"base-token-check-by-lin-desk-895972ac","name":"Base Token Check by LIN Desk","description":"Use when an agent needs a quick ERC-20 contract check on Base before trading or accepting a token: name/symbol/decimals/total supply, owner and whether ownership is renounced, EIP-1967 / legacy proxy (upgradeable) detection, flags. $0.003 per call, USDC on Base (x402). Read-only; not security advice. Non-contract addresses and upstream errors are not charged.","url":"https://lin-desk-x402.lindesk.workers.dev/v1/base/token?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"ERC-20 contract address on Base mainnet"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"name":{"type":["string","null"]},"erc20":{"type":"boolean"},"flags":{"type":"array"},"owner":{"type":["string","null"]},"proxy":{"type":"object"},"symbol":{"type":["string","null"]},"address":{"type":"string"},"decimals":{"type":["integer","null"]},"total_supply":{"type":["string","null"]},"ownership_renounced":{"type":["boolean","null"]}}}}}}},"responseSchema":{"type":"json","example":{"name":"USD Coin","as_of":1791020283,"chain":"base","erc20":true,"flags":["upgradeable_proxy_zeppelinos","has_owner"],"owner":"0x3abd6f64a422225e61e435bae41db12096106df7","proxy":{"eip1967_admin":null,"eip1967_implementation":null,"zeppelinos_implementation":"0x2ce6311ddae708829bc0784c967b7d77d19fd779"},"cached":false,"symbol":"USDC","address":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","chain_id":8453,"decimals":6,"is_contract":true,"block_number":52115468,"total_supply":"4372296189.660356","bytecode_bytes":1852,"total_supply_raw":"4372296189660356","ownership_renounced":false}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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_5oSl0W8UO2EnX0zuFl6yt","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":"Checks an ERC-20 token contract on Base mainnet for name, symbol, decimals, total supply, owner, proxy/upgradeability status, and risk flags.","exampleAgentPrompt":"Before I buy this token, can you check the contract at 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 on Base — I want to know if it's a real ERC-20, who owns it, whether ownership is renounced, and if it's an upgradeable proxy?","exampleUseCases":[{"title":"Pre-trade token safety check","prompt":"I'm about to buy a token at 0x4200000000000000000000000000000000000006 on Base — can you pull its name, symbol, total supply, and tell me if the contract is upgradeable or if ownership has been renounced?"},{"title":"DeFi bot proxy detection","prompt":"Check whether the contract 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 on Base is an upgradeable proxy — I need to know the EIP-1967 implementation address and whether it uses ZeppelinOS before my bot interacts with it."},{"title":"Token listing due diligence","prompt":"We're considering listing a new Base token at address 0x50c5725949a6f0c72e6c4a641f24049a917db0cb — please fetch its on-chain name, symbol, decimals, owner, and any proxy or risk flags so I can review it."}],"resultDescription":"A JSON object containing: token name, symbol, decimals, total supply (human-readable and raw), owner address, ownership_renounced boolean, proxy details (EIP-1967 admin/implementation, ZeppelinOS implementation), is_contract boolean, risk flags array (e.g. 'upgradeable_proxy_zeppelinos', 'has_owner'), chain, chain_id, block_number, bytecode_bytes, and a cached boolean indicating whether the result was served from cache.","failureModes":["Non-contract address supplied — returns an is_contract:false result but is not charged","Upstream RPC error — returns an error response, not charged","Invalid address format — rejected by input validation before the call is made","Token does not implement standard ERC-20 interface — erc20 field returns false","Rate limiting or network timeout from the Base RPC provider"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a cheap, fast, read-only on-chain check of an ERC-20 contract on Base mainnet before trading, listing, or accepting a token. It is specifically valuable for detecting upgradeable proxy patterns (EIP-1967 and ZeppelinOS) and renounced ownership — signals not available from simple token metadata APIs. Prefer it over general blockchain explorers when you need structured, machine-readable output with risk flags at low cost ($0.003/call via x402 USDC on Base) and no API key setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T12:32:17.078Z","isFirstParty":false,"canonicalSlug":"base-token-check-by-lin-desk-895972ac"}