{"uid":"cap_G9kth4dyxkn5ARCay2Cyx","slug":"santyvv-data-chain-balance-lookup-c0046d6f","name":"santyvv-data Chain Balance Lookup","description":"Market and on-chain data, paid per call in USDC on Base through the x402 protocol. No accounts, no API keys. Sources are public data providers; the value added here is keyless access, edge caching, multi-source fallback and normalised responses.","url":"https://x402.santyvv.com/api/chain/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","properties":{}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_nefPoKrRHHj0vSff8s7h_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the on-chain token or native asset balance for a blockchain address, paid per call in USDC via the x402 protocol.","exampleAgentPrompt":"What's the current on-chain balance for wallet address 0xAbCd...1234 on Base?","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Can you look up the on-chain balance for wallet 0x1234...abcd on Base and tell me how much it holds?"},{"title":"Pre-transaction funding check","prompt":"Before I send a payment, check whether wallet 0xDead...Beef has enough native balance on Base to cover the transaction."},{"title":"Airdrop eligibility verification","prompt":"I need to verify the current token balance of address 0xFeed...C0de on-chain — can you fetch that for me without me needing to set up an API key?"}],"resultDescription":"A normalised JSON response containing the on-chain balance (amount and token/asset type) for the queried address on the specified chain, sourced from public blockchain data with multi-source fallback and edge caching.","failureModes":["Invalid or malformed wallet address returns an error response","Unsupported chain identifier results in a 400-level error","Payment failure via x402 (insufficient USDC or wallet issue) blocks the request","RPC/data provider outage on all fallback sources may cause a temporary unavailability","Rate or network issues at the edge cache may introduce stale or delayed data"],"whenToPreferThis":"Choose this endpoint when you need keyless, on-demand on-chain balance lookups without setting up an account or API key, and you are willing to pay $0.01 USDC per call via the x402 micropayment protocol. Ideal for agents that need occasional balance checks without committing to a subscription, or when you want normalised multi-chain responses with built-in fallback.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:37:37.176Z","isFirstParty":false,"canonicalSlug":"santyvv-data-chain-balance-lookup-c0046d6f"}