{"uid":"cap_1MxZ2Sz7ErTqRGS-A6mx0","slug":"synapse-api-base-token-metadata-lookup-754b57f4","name":"Synapse API — Base Token Metadata Lookup","description":"High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.","url":"https://synapse-api-brown.vercel.app/api/base/token/metadata?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"contractAddress":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_X1c0P8DbXoeUG1Z-tgA5q","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches on-chain token metadata (name, symbol, decimals, etc.) for a given ERC-20 or similar contract address on the Base blockchain network.","exampleAgentPrompt":"Can you pull the token metadata — name, symbol, and decimals — for the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base?","exampleUseCases":[{"title":"Identify unknown Base token","prompt":"I just received some tokens at contract address 0x4200000000000000000000000000000000000006 on Base — can you tell me what token this is, its symbol, and how many decimals it uses?"},{"title":"DeFi portfolio token enrichment","prompt":"I have a list of contract addresses from my Base wallet transactions. Can you look up the token name and symbol for 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb so I can label it correctly in my portfolio tracker?"},{"title":"Validate token contract before swap","prompt":"Before I swap into it, can you fetch the metadata for the token at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on Base so I can confirm the name and decimals are what the DEX says they are?"}],"resultDescription":"Returns on-chain metadata for the specified token contract on the Base network, typically including token name, symbol, number of decimals, and potentially total supply or other contract-level fields.","failureModes":["Invalid or malformed contract address returns an error","Contract address exists but is not a token contract (e.g. a plain EOA or non-ERC20 contract) may return empty or error","Network congestion or RPC issues may cause timeouts","Non-Base network addresses will not return correct metadata","Payment failure via x402 protocol blocks the request"],"whenToPreferThis":"Use this endpoint when you need fast, pay-per-call resolution of token metadata on the Base blockchain specifically, without needing to run your own node or maintain an API key with a traditional provider. Ideal for agents that only occasionally need token lookups and want to avoid subscription costs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T00:57:07.962Z","isFirstParty":false,"canonicalSlug":"synapse-api-base-token-metadata-lookup-754b57f4"}