{"uid":"cap_qImsfJ7hk5YYT005lNj49","slug":"multichain-rpc-token-balance-lookup-fe7502ed","name":"Multichain RPC Token Balance Lookup","description":"Cheap, factual EVM chain lookups priced per call in USDC. Base, Polygon, Arbitrum, Optimism and Ethereum.","url":"https://multichain-rpc.clankerceo.workers.dev/token-balance","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"enum":["http"],"type":"string"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"chain":{"type":"string"},"address":{"type":"string"}}}}},"output":{"type":"object","required":["type"],"properties":{"type":{"enum":["json"],"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"chain":"base","native":{"wei":"1000000","amount":"0.000001","symbol":"ETH"},"address":"0x…"}},"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_hsWP3U2H4a2D-sU4cNLnu","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 the ERC-20 token balance (and native coin balance) for a wallet address on a specified EVM chain","exampleAgentPrompt":"What's the ETH and token balance for wallet 0xAbC...123 on Base right now?","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Can you check how much USDC wallet 0x1234...abcd is holding on Arbitrum?"},{"title":"Pre-transfer balance verification","prompt":"Before I send tokens, confirm that 0xDeF...789 has at least 500 USDT on Polygon."},{"title":"Multichain wallet audit","prompt":"Look up the native ETH balance and any token holdings for address 0xABC...999 on Optimism so I can see what's in that wallet."}],"resultDescription":"A JSON object containing the chain name, the wallet address queried, and a native balance object with wei amount, human-readable decimal amount, and token symbol (e.g. ETH). For ERC-20 tokens, equivalent balance fields are returned for the specified token contract.","failureModes":["Invalid or malformed wallet address returns an error or empty result","Unsupported chain identifier returns an error — only Base, Polygon, Arbitrum, Optimism, and Ethereum are supported","Missing required query parameters (chain or address) returns a 400-level error","Network or RPC node timeout may return a 500-level error","Payment failure (insufficient USDC, x402 not supported by client) blocks the request entirely"],"whenToPreferThis":"Choose this endpoint when you need a fast, cheap, per-call token or native balance lookup across major EVM chains (Base, Polygon, Arbitrum, Optimism, Ethereum) without setting up your own RPC node. At $0.002 USDC per call with x402 micropayment support, it's ideal for AI agents that need on-demand, factual on-chain balance data without a monthly subscription. Prefer it over self-hosted RPC when minimizing infrastructure overhead matters, or over general Web3 APIs when you need a simple pay-per-use model.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:40:10.188Z","isFirstParty":false}