{"uid":"cap_a0b8Z03KdkYtOL87gWEql","slug":"btc-address-balance-utxo-lookup-62c66c8f","name":"BTC Address Balance & UTXO Lookup","description":"Balance and unspent outputs for a Bitcoin address. Returns confirmed and mempool balance, funded and spent totals, transaction count and a capped UTXO set for a legacy, p2sh or bech32 address. Informational, not advice.","url":"https://payai.agentstools.dev/btc/address","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","description":"Bitcoin mainnet address (legacy 1.., p2sh 3.., or bech32 bc1..)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"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_JhrpmuhtVvhWQ0EqeAyNL","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 confirmed and mempool balance, funded/spent totals, transaction count, and a capped UTXO set for a Bitcoin address (legacy, P2SH, or bech32).","exampleAgentPrompt":"What's the current confirmed and mempool balance for Bitcoin address bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh, and can you also show me its UTXO set?","exampleUseCases":[{"title":"Verify payment received on-chain","prompt":"Can you check whether Bitcoin address 1A1zP1eP5QGefi2DMPTfTL5SLmv7Divf Na has received any confirmed funds yet, and what the current balance is?"},{"title":"DeFi app wallet balance display","prompt":"Fetch the confirmed balance, mempool balance, and total funded amount for the bech32 address bc1q34aq5drpuwy3wgl9lhup9892qp6svr8ldzyy38 so I can display it in my dashboard."},{"title":"Audit UTXO set before coin selection","prompt":"Pull the full UTXO set and transaction count for Bitcoin address 3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy — I need to figure out which outputs are available to spend."}],"resultDescription":"Returns a JSON object containing the confirmed on-chain balance, mempool (unconfirmed) balance, total funded amount, total spent amount, transaction count, and a capped list of unspent transaction outputs (UTXOs) for the queried Bitcoin mainnet address.","failureModes":["Invalid or malformed Bitcoin address returns an error","Testnet addresses are not supported (mainnet only)","UTXO set is capped — addresses with extremely large UTXO counts may return truncated results","Network or upstream node downtime may cause timeouts","Missing required 'address' query parameter returns a 400-level error"],"whenToPreferThis":"Choose this endpoint when you need a quick, pay-per-call lookup of a Bitcoin address's balance and UTXO set without running your own Bitcoin node or subscribing to a full blockchain data provider. Ideal for agents that need on-demand, real-time Bitcoin wallet inspection for any legacy, P2SH, or bech32 address, especially when low-volume spot checks are needed rather than bulk historical data processing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T07:09:09.579Z","isFirstParty":false}