{"uid":"cap_YP--xRvZrRh60_HYZbV9Y","slug":"api-x402node-dev-76cd3b38","name":"Bitcoin Address Balance Lookup via Blockstream","description":"Bitcoin address balance and stats via blockstream.info (no key). Returns confirmed/unconfirmed sats and BTC, tx count. Use ?address=bc1... or 1.../3.... Built for AI agents tracking BTC wallets and treasury balances. Accepts payment on Base or Solana — either network works.","url":"https://api.x402node.dev/chain/btc-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"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"address":{"type":"string","description":"EVM/chain address (optional)"}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_RmOexevqvMc0bxCBirxgp","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns confirmed/unconfirmed satoshi and BTC balances plus transaction count for a given Bitcoin address using Blockstream.info","exampleAgentPrompt":"What's the current confirmed BTC balance and transaction count for the Bitcoin address bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh — show me both in sats and BTC?","exampleUseCases":null,"resultDescription":"Returns an object with confirmed balance in satoshis, unconfirmed balance in satoshis, confirmed BTC balance, unconfirmed BTC balance, and total transaction count for the queried Bitcoin address.","failureModes":["Invalid Bitcoin address format returns an error","Address not found on blockchain returns zero balances","Blockstream.info upstream outage causes timeout or 5xx error","Missing address parameter returns a bad request error","Mainnet-only — testnet addresses will not return valid data"],"whenToPreferThis":"Use this endpoint when you need a quick, no-API-key lookup of a Bitcoin address balance on mainnet, including both confirmed and unconfirmed UTXOs and tx count. Prefer this over self-hosted node queries when you don't have infrastructure, and over Etherscan-style services for BTC-specific lookups. Ideal for AI agents monitoring BTC treasuries or wallet activity.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:48:17.541Z","isFirstParty":false}