{"uid":"cap_ZjfW_zPbD_ChvAFXatSEY","slug":"multichain-rpc-erc-20-token-balance-lookup-b7695e7d","name":"Multichain RPC – ERC-20 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/erc20-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_VuZlevEtunJTJ7Kqo3pi4","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 for a given wallet address on Base, Polygon, Arbitrum, Optimism, or Ethereum.","exampleAgentPrompt":"What's the USDC balance for wallet 0xAbC123...def on Base right now?","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Can you check how much USDT the wallet 0x4f3edf983AC636a65a842CE7C78d9aa706d3b113 holds on Polygon?"},{"title":"Airdrop eligibility verification","prompt":"I need to verify whether the wallet 0xDEADbEEf...1234 holds at least 100 ARB tokens on Arbitrum before I approve this airdrop claim."},{"title":"Cross-chain token reconciliation","prompt":"Pull the USDC balances for address 0x1234...abcd on both Base and Optimism so I can compare them side by side."}],"resultDescription":"Returns a JSON object containing the chain name, the queried wallet address, and the native or ERC-20 token balance expressed in both raw wei and human-readable decimal form along with the token symbol.","failureModes":["Invalid or malformed wallet address returns an error or empty result","Unsupported chain name returns an error — only Base, Polygon, Arbitrum, Optimism, Ethereum are supported","Missing required query parameters (chain or address) results in a 400-level error","Underlying RPC node unavailable may return a 5xx or timeout","Payment not included or insufficient USDC causes a 402 Payment Required response"],"whenToPreferThis":"Choose this endpoint when you need a quick, cheap per-call ERC-20 token balance lookup across the five most popular EVM chains (Base, Polygon, Arbitrum, Optimism, Ethereum) without provisioning your own RPC infrastructure. At $0.002 USDC per call it is well-suited for agents that need frequent, lightweight balance checks without a long-term API subscription. Prefer it over native ETH balance endpoints when the target asset is an ERC-20 token.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:41:16.482Z","isFirstParty":false}