{"uid":"cap_vzfr2g1NZrJf_96u4Zk09","slug":"2s-io-bitcoin-utxo-lookup-06fa4fb5","name":"2s.io Bitcoin UTXO Lookup","description":"Unspent transaction outputs (UTXOs) for a Bitcoin address (free/keyless): each with txid, output index, value (sats + BTC), confirmation status, and block height. Sorted largest-first. For coin selection, balance verification, and wallet tooling.","url":"https://2s.io/api/crypto/btc-utxos","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"const":"http"},"method":{"const":"GET"},"queryParams":{"type":"object","required":["address"],"properties":{"limit":{"type":"integer","maximum":500,"minimum":1},"address":{"type":"string","maxLength":100,"minLength":20}},"additionalProperties":false}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0036","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":"$0.0036/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0036","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0036","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-6VxM65nsjCphCje92WkR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0036","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns all unspent transaction outputs (UTXOs) for a Bitcoin address, sorted largest-first, with txid, output index, value in sats and BTC, confirmation status, and block height.","exampleAgentPrompt":"Can you pull the UTXOs for the Bitcoin address bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh and show me which ones are confirmed, sorted by size?","exampleUseCases":null,"resultDescription":"A list of UTXOs for the requested Bitcoin address, each containing the transaction ID (txid), output index (vout), value in both satoshis and BTC, confirmation status (confirmed/unconfirmed), and block height. Results are sorted largest-value-first, limited to up to 500 entries.","failureModes":["Invalid or malformed Bitcoin address returns an error response","Address with no UTXOs returns an empty list","Limit parameter out of range (below 1 or above 500) causes a validation error","Network or upstream blockchain data source unavailability causes a 5xx error","Payment failure or insufficient USDC balance blocks the request (x402 payment required)"],"whenToPreferThis":"Use this endpoint when you need UTXO-level detail for a Bitcoin address — especially for coin selection, building raw transactions, or verifying spendable balance at the output level. Prefer this over balance-only endpoints when you need individual output metadata like txid, vout, confirmation status, and block height.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:01:02.277Z","isFirstParty":false}