{"uid":"cap_V5VqrSg8qsqmY37aJogFK","slug":"fastapi-online-token-metadata-lookup-4a4defab","name":"fastapi.online — Token Metadata Lookup","description":"Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.","url":"https://api.fastapi.online/token-metadata","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"chain":{"enum":["ethereum","base","polygon","arbitrum","optimism"],"type":"string"},"address":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2Lq4tot8l8VNj5wMbVyj3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves on-chain metadata for a given token contract address on a specified EVM-compatible blockchain network.","exampleAgentPrompt":"Can you look up the token metadata for contract address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum — I want the name, symbol, and decimals.","exampleUseCases":[{"title":"Identify unknown token contract","prompt":"I found this contract address 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 on Polygon — can you tell me what token it is, its symbol, and how many decimals it uses?"},{"title":"DeFi portfolio enrichment","prompt":"I have a list of token addresses on Base and Arbitrum and I need the name and symbol for each one to label my portfolio — start with 0x4200000000000000000000000000000000000006 on Base."},{"title":"Validate token before swap","prompt":"Before I proceed with this swap, can you fetch the on-chain metadata for contract 0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9 on Arbitrum so I can confirm it's actually USDT?"}],"resultDescription":"Returns on-chain metadata for the specified token contract address, including the token name, symbol, number of decimals, and other contract-level details sourced directly from the specified EVM-compatible blockchain (Ethereum, Base, Polygon, Arbitrum, or Optimism).","failureModes":["Invalid or non-existent contract address returns an error or empty metadata","Unsupported chain value outside the allowed enum causes a validation error","Address is valid but is not a token contract (e.g. an EOA or non-ERC-20 contract), resulting in missing or null fields","Network connectivity issues with the target chain's RPC may cause timeouts","Payment failure or insufficient USDC balance blocks the call"],"whenToPreferThis":"Use this endpoint when you need lightweight, pay-per-call on-chain token metadata resolution across major EVM chains without signing up for a full RPC provider subscription. Ideal for agents that infrequently need token details, want anonymous crypto payment, and need coverage across Ethereum, Base, Polygon, Arbitrum, and Optimism in a single unified API.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T12:28:18.148Z","isFirstParty":false}