{"uid":"cap_CP8sW3O2Ku6dXWwxkmkBH","slug":"fastpath-api-bitcoin-utxo-lookup-by-address-4ccbd7c5","name":"FastPath API – Bitcoin UTXO Lookup by Address","description":"FastPath translates Ethereum-style JSON-RPC requests into Bitcoin data, fee intelligence, mempool insight, and Core v31 package signals. Paid by x402.","url":"https://api.nativebtc.org/v1/utxos/%7Baddress%7D","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"utxos":[{"txid":"81c97a6c5b98a1019095de132727cda868694fb5d92534ebb07e475619e38325","vout":0,"value":125000}],"address":"bc1qexample...","success":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_lBVdfnnJ-z2782QxQO6Nn","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the unspent transaction outputs (UTXOs) for a given Bitcoin address, paid via x402 micropayment.","exampleAgentPrompt":"Can you pull up all the unspent transaction outputs (UTXOs) for Bitcoin address bc1qexample... so I can see what's spendable there?","exampleUseCases":[{"title":"Pre-transaction UTXO inspection","prompt":"Before I build a Bitcoin transaction, show me all the UTXOs available at bc1qmywalletaddress so I know which inputs I can use."},{"title":"Wallet balance verification","prompt":"List all unspent outputs for the Bitcoin address bc1q9xyzabc123 so I can verify the total spendable balance across UTXOs."},{"title":"UTXO monitoring for payment receipt","prompt":"Check the UTXOs for bc1qreceiveaddress456 and tell me if any new unspent outputs have appeared since I sent a payment there."}],"resultDescription":"A JSON object containing a list of UTXOs for the queried Bitcoin address, where each UTXO includes the transaction ID (txid), output index (vout), and value in satoshis. Also includes the queried address and a success flag.","failureModes":["Invalid or malformed Bitcoin address returns an error or empty UTXO list","Address with no transaction history returns an empty UTXOs array","Network or node connectivity issues may cause timeouts","x402 payment failure or insufficient funds results in HTTP 402 and no data returned","Rate limiting if too many requests are made in quick succession"],"whenToPreferThis":"Choose this endpoint when you need the raw UTXO set for a specific Bitcoin address — especially useful for transaction construction, wallet balance checks, or UTXO-level auditing. It is particularly suited to Ethereum-tooling-familiar developers who want Bitcoin data in a familiar JSON-RPC-adjacent style. Use this over general blockchain explorers when you need structured, machine-readable UTXO data with micropayment access (x402) and no API key setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:41:40.284Z","isFirstParty":false}