{"uid":"cap_uv4yqmhOYIiMLh_K90aQ0","slug":"chainread-balance-9f531eb9","name":"ChainRead Balance","description":"Cheap EVM read utilities for AI agents on Base and Ethereum mainnet: gas and fees, blocks, balances, ERC-20 metadata, contract inspection, transaction status, ENS/Basename resolution, bulk balances. No API key: pay USDC on Base per call via x402.","url":"https://chainread.imac2014ville.workers.dev/balance?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"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"chain":{"enum":["base","ethereum"],"type":"string","description":"Chain to read (default base)"},"tokens":{"type":"array","items":{"type":"string"},"description":"ERC-20 addresses, max 20 (GET: comma-separated; default: common tokens)"},"address":{"type":"string","description":"Wallet or contract address (0x…)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"chain":"base","native":{"usd":3732000,"balance":"1523.4"},"tokens":[{"symbol":"USDC","balance":"5120.33","decimals":6}],"address":"0x4200000000000000000000000000000000000006"}},"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_d2AYS9LpBhEtAL7fpbYoa","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":"Fetches native ETH and ERC-20 token balances for a wallet or contract address on Base or Ethereum mainnet","exampleAgentPrompt":"What's the ETH balance and USDC balance for wallet 0x4200000000000000000000000000000000000006 on Base right now?","exampleUseCases":[{"title":"Portfolio snapshot before a trade","prompt":"Check how much ETH and USDC wallet 0xAbCd...1234 is holding on Base before I decide whether to swap."},{"title":"Verify airdrop recipient balance","prompt":"Can you confirm that address 0xDEAD...BEEF on Ethereum mainnet actually received the USDC airdrop — show me their current USDC and ETH balances?"},{"title":"Monitor a treasury wallet","prompt":"Look up the native ETH and top ERC-20 balances on Base for our treasury address 0x9876...5432 so I can report the current holdings."}],"resultDescription":"Returns a JSON object with the queried chain, the wallet address, the native ETH balance (as a string and in USD), and an array of ERC-20 token balances each including symbol, balance, and decimals.","failureModes":["Invalid or malformed address returns an error response","Unsupported chain value (not 'base' or 'ethereum') results in a validation error","More than 20 ERC-20 token addresses requested returns an error","Network or RPC timeout may return a failed response","Payment failure (insufficient USDC for x402 fee) blocks the request"],"whenToPreferThis":"Choose this endpoint when you need a cheap, no-API-key way to read native ETH and ERC-20 balances on Base or Ethereum mainnet. It supports bulk token lookups (up to 20 tokens) in a single call and returns USD-denominated native balance, making it ideal for agents that need quick portfolio snapshots or balance checks without setting up a full RPC provider subscription.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T12:36:04.932Z","isFirstParty":false,"canonicalSlug":"chainread-balance-9f531eb9"}