{"uid":"cap_Tf-IMpZ8jOFeAw2gyB5Lq","slug":"plainchain-wallet-balances-api-34ef976a","name":"Plainchain Wallet Balances API","description":"Gas, balances, token data, address type, approvals, transaction decoding, x402 receipt verification and verifiable randomness on Base, Arbitrum, Ethereum and Optimism. No API key: pay $0.001-$0.01 per call in USDC on Base via x402.","url":"https://plainchain.appin60.com/v1/balances?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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":{"type":"string","description":"base (default), arbitrum, ethereum or optimism; chain ids 8453, 42161, 1, 10 also work"},"tokens":{"type":"string","description":"optional comma-separated extra ERC-20 addresses"},"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"wallet address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"chain":"Base","native":{"usd":31.08,"symbol":"ETH","balance":"0.0123"},"tokens":[{"usd":152.4,"token":"0x8335...","symbol":"USDC","balance":"152.4"}],"address":"0x...","totalUsd":183.48}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001942","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":"$0.001942/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001942","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001942","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_AMJ8Sz3oFzRG4Ni4SYRaT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001942","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns native ETH and ERC-20 token balances (with USD values) for a given wallet address on Base, Arbitrum, Ethereum, or Optimism","exampleAgentPrompt":"What's the current ETH and USDC balance for wallet 0xAbC1234...5678 on Base, and what's the total USD value?","exampleUseCases":[{"title":"Pre-transaction balance check","prompt":"Before I send that payment, can you check how much ETH and USDC wallet 0x1234...abcd has right now on Base so I know if there's enough to cover it?"},{"title":"DeFi portfolio snapshot","prompt":"Give me a full breakdown of all token balances and their USD values for address 0xDEAD...BEEF on Arbitrum — I want to see ETH plus any ERC-20s."},{"title":"Multi-token wallet monitoring","prompt":"Check the wallet 0xaaaa...bbbb on Ethereum and include balances for these extra tokens: 0x6b17...1d0f and 0x2260...1e0c — I need the USD totals for each."}],"resultDescription":"A JSON object containing the chain name, native ETH balance with symbol and USD value, an array of ERC-20 token balances each with token address, symbol, balance, and USD value, the queried address, and a totalUsd figure summing all holdings.","failureModes":["Invalid or malformed wallet address (must match 0x + 40 hex chars) returns an error","Unsupported chain identifier returns an error","Invalid extra token address in 'tokens' parameter causes lookup failure","Insufficient USDC payment via x402 results in 402 Payment Required response","Network/RPC issues on the target chain may cause timeouts or partial data"],"whenToPreferThis":"Use this endpoint when you need a quick, pay-per-call (no API key) multi-token balance snapshot for a wallet on Base, Arbitrum, Ethereum, or Optimism with USD values included. Prefer it over free RPCs when you need USD-denominated totals without doing your own price lookups, and when operating in an x402-compatible agent that can pay micro-amounts in USDC on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-14T06:41:37.359Z","isFirstParty":false,"canonicalSlug":"plainchain-wallet-balances-api-34ef976a"}